In Bed Form Patents (Class 210/617)
  • Patent number: 10239774
    Abstract: The field of advanced wastewater treatment, and more specifically, to a natural pyrrhotite biofilter and a method for utilizing same to synchronously remove nitrate-nitrogen and phosphorus from water is provided. The method includes the following steps: (1) preparation of the packing material and construction of the biofilter; (2) start-up of the biofilter; (3) operation of the biofilter. The method disclosed in the present invention on the one hand takes pyrrhotite as the electron donor to help sulfur-based autotrophic denitrifying bacteria reduce nitrates into nitrogen gas, and on the other hand utilizes pyrrhotite and its oxidates to eliminate phosphorus through adsorption and chemical precipitation. Therefore, this method realizes synchronous removal of nitrate-nitrogen and phosphorus in water.
    Type: Grant
    Filed: June 28, 2014
    Date of Patent: March 26, 2019
    Inventors: Ruihua Li, Junsong Hu, Qianqian Sun, Xiaomei Zhang, Zhuo Liu, Xinmin Zhan, Aimin Li
  • Patent number: 10207942
    Abstract: An object is to provide a pretreatment device of seawater capable of growing and maintaining a biofilm in a good state on each of a plurality of filters connected in series, by supplying nutrients appropriately to the filters. A pretreatment device of seawater is used in removing salt from the seawater to obtain freshwater, and includes: a supply duct (21) through which the seawater is to be supplied; a plurality of filters (16) including a particulate filtering material and a biofilm; connecting tubes (23) which connect the plurality of filters in series; a plurality of bypass tubes (24) each of which connects corresponding one of the plurality of filters to the supply duct; and a plurality of regulating valves (26) each of which is disposed in corresponding one of the plurality of bypass tubes to regulate a flow rate.
    Type: Grant
    Filed: July 29, 2014
    Date of Patent: February 19, 2019
    Inventors: Masayuki Tabata, Yoshiaki Ito, Katsunori Matsui, Kiichi Tokunaga, Hideo Iwahashi
  • Patent number: 10179895
    Abstract: A process and apparatus for converting sequestered carbon to fuel, such as methane, and/or materials, such as fermentation substrates, biopolymers, bioplastics, oils, pigments, fibers, proteins, vitamins, fertilizers and animal feed. The apparatus comprises a deep well carbon-sequestering bioreactor coaxially located within a deep well anaerobic bioreactor. Carbon is sequestered into a photosynthetic biomass or a heterotrophic biomass, which is subsequently digested by an anaerobic biomass containing methanogenic microbes, whereby methane is a digestion product.
    Type: Grant
    Filed: October 19, 2015
    Date of Patent: January 15, 2019
    Inventors: Prasad S Kodukula, Charles R Stack
  • Patent number: 9994471
    Abstract: An improved livestock wastewater treatment system for treating wastewater produced by a confined animal feeding operation (CAFO) facility to reclaim water and solids from the wastewater, and to reduce the environmental footprint of the CAFO facility is provided. The treatment system combines both mechanical and chemical water treating and includes separation of liquids from solids, collection of the separated solids at various stages, and treatment of the remaining liquid so that it can be reclaimed. Methods of treating livestock wastewater with the livestock wastewater treatment system is also provided.
    Type: Grant
    Filed: May 5, 2009
    Date of Patent: June 12, 2018
    Assignee: IWR Technologies Ltd.
    Inventors: Ross Thurston, Karen Schuett
  • Patent number: 9717219
    Abstract: The invention relates to a water inlet arrangement for the use in fish tanks in aquaculture, including a pipe to feed water into the tank, the pipe having a plurality of openings and, for a better adjustment of the flow, a surrounding second element having a plurality of openings and/or a fixed or adjustable shield are provided.
    Type: Grant
    Filed: February 7, 2014
    Date of Patent: August 1, 2017
    Assignee: Linde Aktiengesellschaft
    Inventors: Karsten Glomset, Kenneth Glomset, Ove Gjelstenli
  • Patent number: 9540266
    Abstract: Moving bed media serving as a growth surface for bacteria that remove soluble carbonaceous BOD, soluble inorganic ammonia nitrogen, phosphorous, nitrate nitrogen or nitrite nitrogen from wastewater are contained in a variable liquid depth, variable volume, hydraulic flow equalization basin. The equalization basin can be divided into different treatment sections by installing separator screens. Fat accumulation on the moving media, which could cause the media to float or in some other way cause the media to be ineffective, can be prevented by a fat, oil, and grease removal process in a dissolved air flotation cell upstream of the flow equalization basin containing the moving bed media. The moving bed media are retained in the basin by a suitable media screen as the liquid level and volume increases or decreases in the basin depending upon the effluent pumping rate vs. the influent flow rate.
    Type: Grant
    Filed: September 17, 2014
    Date of Patent: January 10, 2017
    Inventor: John H. Reid
  • Patent number: 9284204
    Abstract: The invention relates to a process for the biological purification of coking plant wastewater that is loaded with nitrogen compounds, cyanides, phenols and sulphides. The coking plant wastewater, for removal of pollutants that inhibit a nitrification, is fed together with a biomass-containing stream of matter to a detoxification reactor that has a gas-treatment zone and a reaction zone. The feed mixture supplied to the detoxification reactor is exposed in the gas-treatment zone to a gaseous oxidizing agent. A stream of matter enriched with the oxidizing agent is fed to the reaction zone in which cyanides and other pollutants inhibiting the nitrification are biodegraded. A stream of matter is withdrawn from the reaction zone and returned to the detoxification reactor. In addition, a wastewater stream from the detoxification reactor is separated by a membrane filtration into a biomass-containing retentate stream and a purified permeate stream.
    Type: Grant
    Filed: April 2, 2012
    Date of Patent: March 15, 2016
    Inventor: Holger Thielert
  • Patent number: 9150468
    Abstract: Disclosed is a method of producing an organic compound. The method uses a metathesis catalyst in a coupling reaction of an olefin. The method comprises the steps of introducing the olefin into a container; either placing the container under vacuum or bubbling a gas through the olefin; adding an additive with the olefin; mixing the olefin and the additive, the mixing creating a mixture; adding an amount of the metathesis catalyst to the mixture, the amount being less than about 100 ppm by weight of the mixture; and optionally heating the mixture to a temperature, the temperature being greater than room temperature.
    Type: Grant
    Filed: September 28, 2011
    Date of Patent: October 6, 2015
    Assignee: Nalco Company
    Inventors: Bryan M Schertzer, Karol L. Grela, Justyna Czaban
  • Patent number: 9096448
    Abstract: Anaerobic treatment of water is performed under anaerobic conditions with a biofilm formed on a surface of a fluid non-biological carrier in a reaction vessel. Stable high-load treatment is performed by preventing the blockage of the reaction vessel caused by the flotation and adhesion of the non-biological carrier in the reaction vessel and effectively recovering the settleability of the carrier floating owing to adhering air bubbles by simple means. A reaction vessel is charged with a fluid non-biological carrier having a size in the range of 1.0 to 5.0 mm and a settling velocity in the range of 200 to 500 m/h. Part of the carrier that has floated and flowed out of the reaction vessel is fed downward through a pipe having a vertical height of 50 cm or more so as to remove air bubbles adhering to the carrier and is returned to the reaction vessel.
    Type: Grant
    Filed: November 17, 2011
    Date of Patent: August 4, 2015
    Inventors: Takaaki Tokutomi, Hideaki Shinto
  • Patent number: 9043997
    Abstract: An external filter for an aquarium includes a canister filter having a filter assembly removably oriented therein. The filter assembly includes at least two stacked trays releasably secured together in series. The stacked trays include a compartment for holding filter media. In one embodiment, the trays are releasably secured together with a strap. In one embodiment, the filter assembly also includes a handle. In one example, the strap forms a portion of the handle.
    Type: Grant
    Filed: February 22, 2012
    Date of Patent: June 2, 2015
    Assignee: Spectrum Brands, Inc.
    Inventors: Mark Gerard Agresta, Joseph Christopher Carley
  • Publication number: 20150136694
    Abstract: Water treatment and remediation processes for hormones and/or endocrine disrupting chemicals are disclosed. A bioreactor apparatus is provided having hormone degrading microbes suitable for forming a biofilm for such remediation processes wherein the water containing the hormones and/or endocrine disrupting chemicals provide a substrate for the biofilm. Methods of regenerating the bioreactors and filters for water treatment are disclosed. Additional applications of use for the water treatment and remediation include, for example, agricultural applications and consumer applications. Methods of employing the bioreactors and filters, methods of regenerating the bioreactor, kits, and assays for specific hormones and/or endocrine disrupting chemicals are also disclosed.
    Type: Application
    Filed: November 18, 2013
    Publication date: May 21, 2015
    Inventor: Renee Loretta LaFond
  • Patent number: 9011689
    Abstract: An artificial recharge system and method for recharging an aquifer. The artificial recharge system includes a constructed wetland, a settling pond, and a porous recharge reservoir. The constructed wetland receives water from a surface water source and has aquatic vegetation used to remove sediments and chemicals from the water. The settling pond receives the water from the constructed wetland and provides additional sediment removal. The porous recharge reservoir, which is hydraulically connected to the aquifer, receives the water from the settling pond. The water flows by gravity from the porous recharge reservoir to the aquifer. A backflush tube installed within a sand layer in the porous recharge reservoir is used to remove sediment and particulates from the sand layer.
    Type: Grant
    Filed: July 31, 2012
    Date of Patent: April 21, 2015
    Assignee: The United States of America, as represented by the Secretary of the Department of the Interior
    Inventor: John B. Czarnecki
  • Publication number: 20150041393
    Abstract: Introducing a high surface area media into a sewage treatment process to improve and increase capacity of a given process. The high surface area media can be dispersed at strategic locations in a new or existing attached growth wastewater treatment plant so as to provide additional sites for biological growth and improved wastewater renovation.
    Type: Application
    Filed: August 20, 2014
    Publication date: February 12, 2015
    Inventor: William G. Smith
  • Patent number: 8940170
    Abstract: A dual-chambered horizontal flow water treatment system and method provides a first chamber with a first filtration system connected with a second chamber with a second filtration system in a horizontal orientation, such that influent water first passes through the first chamber and then passes through the second chamber. The influent water moves through the first chamber and second chamber in a horizontal flow path to provide for pre-filtering with the first filtration system before traveling through granular media in the second filtration system.
    Type: Grant
    Filed: September 23, 2011
    Date of Patent: January 27, 2015
    Assignee: Modular Wetland Systems, Inc.
    Inventors: Greg B. Kent, Zach J. Kent
  • Patent number: 8936725
    Abstract: Constructed wetland wastewater treatment equipment under low temperature for continuous operation which includes: three-section substrates filled in a constructed wetland, ventilation pipes being arranged in the substrates, a height of a bed of the constructed wetland being higher than a height of the substrates; a double wall being filled with an organic substance used as a barrier at periphery of the constructed wetland; a water distributing pipe disposed at a top of the three-section substrates and a water collecting pipe disposed at a bottom of the three-section substrates; and a water inlet pipe connected to an upper portion at one end of the three-section substrates and a water outlet pipe connected to a lower portion at the other end of the three-section substrates, a water outlet of the water outlet pipe being higher than the height of the bed of the constructed wetland.
    Type: Grant
    Filed: June 7, 2012
    Date of Patent: January 20, 2015
    Assignee: Chinese Research Academy of Environmental Sciences
    Inventors: Beidou Xi, Lieyu Zhang, Jixi Gao, Jinbiao Wang, Xunfeng Xia, Qigong Xu
  • Patent number: 8926844
    Abstract: Systems and methods for reducing an amount of unwanted living organisms within an algae cultivation fluid are provided herein. According to some embodiments, methods may include subjecting the algae cultivation fluid to an amount of cavitation, the amount of cavitation being defined by a pressure differential between a downstream pressure and a vapor pressure, the pressure differential divided by half of a product of a fluid density multiplied by a square of a velocity of an apparatus throat.
    Type: Grant
    Filed: March 29, 2011
    Date of Patent: January 6, 2015
    Assignee: Aurora Algae, Inc.
    Inventors: Mehran Parsheh, Megan Hippler, Shahrokh A Naieni, Guido Radaelli
  • Patent number: 8900456
    Abstract: A method of treating wastewater containing an organic compound includes feeding wastewater to an anoxic tank, adding compounds containing nitrogen and phosphorus components to wastewater, performing anaerobic treatment on wastewater, and discharging treated wastewater as pre-treated water; introducing pre-treated water into an anaerobic treatment tank, performing anaerobic treatment on pre-treated water, thereby decomposing the organic compound into organic compounds of smaller molecular size and a mixture gas containing methane and carbon dioxide, and discharging treated water as primary water; introducing primary water into an aerobic treatment tank, performing aerobic treatment on primary water, and discharging treated water through a solid-liquid separator as secondary water; and introducing at least a part of secondary water into a reverse osmosis membrane separation unit, and separating part of secondary water into RO permeated water and RO concentrated brine, wherein at least a part of RO concentrated
    Type: Grant
    Filed: September 1, 2010
    Date of Patent: December 2, 2014
    Assignees: Chiyoda Corporation, Toray Industries, Inc.
    Inventors: Masayo Shinohara, Kazuhige Kawamura, Hiromi Satoh, Toshinobu Imahama, Atsushi Kitanaka, Masahide Taniguchi
  • Patent number: 8889007
    Abstract: The present invention is a wastewater treatment system utilizing a recirculating filter system comprising sand, gravel, or synthetic media. Septic effluent is continuously, or approximately continuously, dosed under pressure to the treatment media through pressure compensating drip irrigation emitters. The system comprises a commonly known septic tank and recirculation tank. Septic tank effluent is collected in the recirculation tank, from which it is continually dosed by means of a pump to the top of the treatment media of the recirculating filter through pressure compensating drip emitters. Continuous dosing of diluted residential septic tank effluent through drip irrigation emitters provides a slow consistent application of liquid rich in organic material and pathogens over the treatment media. The treated effluent is then recirculated if water is low or went to final disposal.
    Type: Grant
    Filed: July 13, 2011
    Date of Patent: November 18, 2014
    Inventors: David Mark Lowe, Richard D. Eldredge
  • Publication number: 20140246369
    Abstract: A process and system for treating wastewater is described. The invention degrades sludge produced by treatment of the wastewater to reduce or eliminate the need for sludge dewatering and disposal. The invention also reduces the amount of nutrient additives required to sustain the aerobic wastewater treatment process. In one embodiment the invention includes the steps of (a) providing an aerobic treatment system receiving a supply of the wastewater; (b) treating a supply of the sludge to rupture microbial cells present therein to produce treated sludge having an increased liquid:solid ratio and an increased degradation potential in comparison to untreated sludge; (c) conveying a supply of the treated sludge to the aerobic treatment system; and (d) substantially degrading the supply of treated sludge in the aerobic treatment system. The treated sludge may optionally be subjected to anaerobic digestion prior to delivery to the aerobic treatment system.
    Type: Application
    Filed: March 1, 2013
    Publication date: September 4, 2014
    Inventors: Robert John Stephenson, Scott Christopher Laliberte, Preston Yee Ming Hoy, Patrick William George Neill
  • Patent number: 8821728
    Abstract: A system of treating high nitrogen content waste water is disclosed, where the system includes a precipitation and conditioning subsystem, an ammonia stripper subsystem, and a denitrification subsystem. The system is adapted to reduce nitrogen contamination to level below about 10 ppm and in certain embodiments below 3 ppm.
    Type: Grant
    Filed: September 20, 2013
    Date of Patent: September 2, 2014
    Inventors: Randy A. Galgon, Allen Ray Stickney, Richard B. Steinberg
  • Patent number: 8784660
    Abstract: In some embodiments, a wastewater treatment system may reduce contaminants in water. A system may include one or more bioreactors which include a substrate that supports a biofilm. The bacteria used to form the biofilm may be selected to maximize the reduction of contaminants in water. Various components of the wastewater treatment system may be optimized to improve the efficiency and energy consumption of the wastewater system.
    Type: Grant
    Filed: November 8, 2012
    Date of Patent: July 22, 2014
    Assignee: Sam Houston State University
    Inventors: Phillip Grisham, Michael D. Rainone
  • Publication number: 20140197099
    Abstract: A facility and a method for treating high strength wastewater include a plurality of beds having layers of granular and textile material through which the wastewater flows for reduction of BOD and COD. The wastewater is conducted to and from the beds using piping networks. Distribution conduits and drain conduits are arranged within the bed. Wastewater flow is controlled by valves remotely actuated via a control system.
    Type: Application
    Filed: January 10, 2014
    Publication date: July 17, 2014
    Inventors: Karen Mancl, Ryan Kopp, Rashmi S. Gaur, Olli H. Tuovinen
  • Patent number: 8778135
    Abstract: A circular utilization method in pulping and papermaking processes with straw Primary pulp is obtained by digesting straw raw material according to the ammonium sulfite method. Concentrated black liquor is extruded from the primary pulp; paper pulp and diluted black liquor. The concentrated black liquor and the diluted black liquor are mixed, and a contaminated condensate is obtained. A residual concentrate or the concentrated black liquor is used for preparing a fertilizer. The contaminated condensate is mixed with one or more of the waste material obtained from stock preparation, a crop byproduct or organic waste, and substrate or fertilizer is obtained by fermenting the nitrogen source of the contaminated condensate or ammonium sulfite, or using the contaminated condensate for desulfurizing flue gas. Ammonia and flue gas are reacted to obtain the ammonium sulfite as a digestion agent; and water from recycling is used in corresponding phases of the pulping process.
    Type: Grant
    Filed: March 11, 2011
    Date of Patent: July 15, 2014
    Assignee: Shandong Tralin Paper Co., Ltd.
    Inventors: Hongfa Li, Mingxin Song, Songtao Chen, Jihui Yang, Liangjin Guo
  • Patent number: 8771515
    Abstract: A horizontal flow water treatment method and wetland biofilter apparatus provides a chamber with impermeable outer walls spaced away from permeable interior walls of a media filtration bed such that a catch basin is formed between the outer walls and the interior walls. The catch basin creates an open area around the perimeter of the interior walls for influent water to fill within the open area on all sides before penetrating the filtration media, providing a large surface area for influent water to interact with the media filtration bed. The influent water enters the catch basin in a horizontal flow path to provide for pre-settling of particulates before making contact with the filtration media. The biofilter design increases the available surface area of the media filtration bed by up to four times for a given volume of water, and thereby minimizes the loading or infiltration rate on the media filtration bed.
    Type: Grant
    Filed: November 5, 2012
    Date of Patent: July 8, 2014
    Assignee: Modular Wetland Systems, Inc.
    Inventors: Greg B Kent, Zach J Kent
  • Patent number: 8764986
    Abstract: A system and method are provided for removal of undesirable substances from a body of liquid. The system can include an aeration structure having a continuously inclined surface configured to provide an interaction of air bubbles against substantially an entire length of the continuously inclined surface while the air bubbles are moving toward a top of the body of liquid. The continuously inclined surface can be substantially submerged in the body of liquid. A bio-film of diverse bacteria colonies is disposed on the continuously inclined surface, and a high surface area-to-volume structure is located in proximity to the aeration structure, upon which a bio-film of bacteria colonies can be formed.
    Type: Grant
    Filed: December 22, 2009
    Date of Patent: July 1, 2014
    Assignee: University of Utah Research Foundation
    Inventors: Kraig Johnson, Lawrence D. Reaveley, Fred Jaeger, Hua Xu, Joyce A. Okey
  • Patent number: 8765449
    Abstract: A three stage, multiple phase anaerobic digestion system and method designed to separate the biological phases, optimize microbial activity in each phase, and significantly increase system reliability and energy production. The system physically separates the biological phases of anaerobic digestion based on particle size, particle density, and solubility of metabolic products. The system allows a complex multi-phased biological system to develop without the need for excessive control or operator intervention.
    Type: Grant
    Filed: July 31, 2009
    Date of Patent: July 1, 2014
    Assignee: Advanced Bio Energy Development LLC
    Inventor: William C Stewart
  • Patent number: 8753512
    Abstract: An anoxic packed-bed biological and chemical system for removing nitrates/perchlorate from water includes a vessel having a distribution plate that partitions the vessel into a lower influent-receiving chamber and an upper biological and chemical denitrification chamber. A granular media is supported by the distribution plate to provide a packed bed that has sites for biological growth. A recycle system recycles partially treated water into the closed lower end of the vessel for upflow through the distribution plate.
    Type: Grant
    Filed: March 12, 2013
    Date of Patent: June 17, 2014
    Inventor: George Slajchert
  • Patent number: 8721886
    Abstract: Provided are an apparatus and a method for river water purification using a treatment soil layer and a permeable filtering medium layer. The river water purification apparatus includes a treatment soil layer and a permeable filtering medium layer which are sequentially and alternately stacked. The treatment soil layer includes a plurality of unit soil layers which are arranged at intervals. A reservoir part which stores a predetermined amount of river water and supplies the river water to an inside of the unit soil layer is provided in an upper end part of the unit soil layer. The permeable filtering medium layer has a higher hydraulic conductivity than that of the treatment soil layer. The river water purification apparatus increases a treatment flux of river water regardless of a coefficient of water permeability of soil and effectively removes nitrogen, phosphorus and nutrient salts by stably forming an anaerobic condition.
    Type: Grant
    Filed: November 2, 2010
    Date of Patent: May 13, 2014
    Assignee: Korea Institute of Science and Technology
    Inventors: Kyu Hong Ahn, Kyung Guen Song, Kang Woo Cho, Dong-Won Ki, Jin Woo Cho, Se Yeon Won, Hae Seok Oh, Ki Pal Kim
  • Patent number: 8721888
    Abstract: A wastewater treatment method using annularly arranged microorganism carriers in a reaction tank, which defines therein an upper reaction area, a lower reaction area and a passage area surrounded by the microorganism carriers and kept in communication between the upper reaction area and the lower reaction area. Microorganisms including nitrifying bacteria and autotrophic denitrifying bacteria are attached to the surface of each microorganisms carriers and suspending in the water of the reaction tank for causing Anammox reaction to convert NH4+ and NO2? in wastewater into nitrogen gas, achieving removal of total nitrogen compounds from water. The microorganism carriers are used to retain microorganisms in the reaction tank, enhancing the treatment efficiency.
    Type: Grant
    Filed: September 1, 2011
    Date of Patent: May 13, 2014
    Assignees: Leaderman & Associates Co., Ltd., National Chiao Tung University
    Inventors: Der-Ming Lee, Ming-Kuei Chiang, Chin-Te Chen, Keng-Chuan Sung, Jih-Gaw Lin, Sin-Han Su
  • Patent number: 8715503
    Abstract: In some embodiments, a wastewater treatment system may reduce contaminants in water. A system may include one or more bioreactors which include a substrate that supports a biofilm. The bacteria used to form the biofilm may be selected to maximize the reduction of contaminants in water. Various components of the wastewater treatment system may be optimized to improve the efficiency and energy consumption of the wastewater system.
    Type: Grant
    Filed: November 8, 2012
    Date of Patent: May 6, 2014
    Assignee: Sam Houston State University
    Inventors: R. Gavin Jones, Kenneth Wilson, Sabin Holland, Michael D. Rainone
  • Patent number: 8685235
    Abstract: An integrated sewage biochemical treatment plant containing mechanical treatment devices, a sewage-and-sludge mixing chamber with a circulation pump and a combined biological treatment device, includes a plane feed biofilter, a spray line, collecting trays and drain collectors connected to water-jet aeratic columns sunk in the aeration zones, and aftertreatment devices. The combined biological treatment device whose capacity is 5 to 15,000 m3/day has a biofilters spray line that includes trays with emptying fittings and reflecting disks, the distance from the trays emptying fittings upper ends to the disk reflectors is 0.8 to 2 m, and the distance between the trays centers and the distance between the trays fittings axes is 0.6 to 1.8 m.
    Type: Grant
    Filed: March 14, 2011
    Date of Patent: April 1, 2014
    Inventor: Vladimir Petrovich Kolesnikov
  • Patent number: 8652329
    Abstract: In a sewage disposal system, a de-nitrification station is configured as a heap of foam cubes located in an airtight enclosure from which oxygen is excluded. Carbon is added to the incoming nitrified water. The heap of foam cubes is arranged as a free-draining trickle filter, but here under asphyxiant conditions in the enclosure. Anaerobic microbiological reactions reduce the nitrate to nitrogen gas. Effluent from the de-nitrifier is polished by feeding back a fraction of the effluent through the aeration station from which the nitrate water is derived, or a separate polishing station can be provided.
    Type: Grant
    Filed: November 30, 2009
    Date of Patent: February 18, 2014
    Assignee: Rowanwood IP Inc.
    Inventor: E. Craig Jowett
  • Publication number: 20130334135
    Abstract: Recalcitrant chemical oxygen demand (COD) of a liquid is reduced in a water treatment system. The method includes pretreating the liquid in a pretreatment unit to remove indigenous bacteria or microbes to a population level below which the indigenous organisms can interfere with the screened and externally introduced microorganisms. The liquid is then provided to a reactor that has a filter bed formed with a carrier material. Special microbes are screened and used to colonize the carrier material to remove recalcitrant COD. A biofilm is cultured on the surface of the carrier material to immobilize the screened microbes in the reactor. The method further includes percolating the liquid from the pretreatment unit through the filter bed colonized with the screened microbes to degrade at least part of the recalcitrant COD under aerobic conditions.
    Type: Application
    Filed: March 7, 2011
    Publication date: December 19, 2013
    Inventors: Sijing Wang, Zhonghong Cheng, Weiqing Xu
  • Patent number: 8603329
    Abstract: A wastewater treatment apparatus of the present invention is configured to biologically filter wastewater through multimedia by consecutively performing two stages (the first and second stages) for a multimedia biological filtration process. A carbon source and coagulant are respectively injected during the first and second multimedia biological filtration processes. The first stage multimedia biological filtration process is carried out in anoxic conditions and the second stage multimedia biological filtration process is carried out in aerobic conditions. The media for the first and second stage biological filtration processes are arranged in large-middle-middle large-small size. Thus, the present invention can secure excellent treated water while minimizing loss of water-head by maximizing reflux capability of solids.
    Type: Grant
    Filed: April 27, 2009
    Date of Patent: December 10, 2013
    Assignee: Bookang Tech Co., Ltd.
    Inventors: Dae Hwan Rhu, Yeong Ki Yeo, Se Wook Seo, Yong June Yune, Bong Choel Choi, Byung Suk Lee, Hwa Sun Lee
  • Publication number: 20130313190
    Abstract: A desalination system (100) having an intake unit (110) providing seawater to a pre-treatment unit (120) connected to a reverse osmosis (RO) desalination unit (130) and a post treatment unit (150). The desalination system (100) is configured to operate without any external addition of chemicals to simplify logistics and regulation concerns. The units of the system are configured to prevent biofouling, scaling and corrosion by mechanical and biological means including high flow speeds, biological flocculation of colloids, and making the water entering the RO units inhospitable to bacteria and other organisms that cause biofouling, hence preventing their settlement and removing them with the brine. Recovery rate is lowered and energy is recovered to increase the energetic efficiency and minerals that are added to the product water are taken from the brine.
    Type: Application
    Filed: October 24, 2011
    Publication date: November 28, 2013
    Applicant: I.D.E. TECHNOLOGIES LTD
    Inventors: Amnon Levy, Boris Liberman, Gal Greenberg
  • Publication number: 20130247832
    Abstract: A biofilter is provided. The biofilter comprises a housing; an inlet defining an upstream end of the housing; an outlet defining a downstream end of the housing; a chamber comprising an upstream opening and a downstream opening, the chamber configured to contain a filtration medium; and a counter flow generator for generating a counter flow of water in an upstream direction in the chamber. Related methods and systems are also provided.
    Type: Application
    Filed: January 11, 2013
    Publication date: September 26, 2013
    Inventors: John Leslie HOLDER, Robert Scott MCKINLEY
  • Patent number: 8535533
    Abstract: The invention provides a bioretention system comprising one or more chambers and a high flow bypass system with top and bottom weirs for water filtration and storm water flow management. The invention also provides methods that are useful for managing storm water flow and inhibiting the flow of pollutants, debris, and other contaminants into drainage systems.
    Type: Grant
    Filed: December 22, 2010
    Date of Patent: September 17, 2013
    Assignee: KriStar Enterprises, Inc.
    Inventor: Douglas Allard
  • Patent number: 8524084
    Abstract: A wastewater treatment system includes wastewater having nitrogen-containing compounds, an anoxic zone having denitrifying bacteria, and an aerobic zone having nitrifying bacteria. The anoxic zone is coupled to the aerobic zone, and wastewater flows from the anoxic to the aerobic zone or vice versa. A fluidized bed heat exchanger configured to accept heat from a heat engine and to transfer the heat from the heat engine to the wastewater is positioned in the aerobic zone or the anoxic zone. The fluidized bed heat exchanger includes particulate media, and fluidization of the particulate media scrubs bacterial growth from portions of the fluidized bed heat exchanger. Treating wastewater can include flowing wastewater having nitrogen-containing compounds into a biological reactor having an anoxic zone and an aerobic zone, and heating the wastewater with heat from a heat engine to facilitate denitrification reactions in the anoxic zone and nitrification reactions in the aerobic zone.
    Type: Grant
    Filed: December 20, 2012
    Date of Patent: September 3, 2013
    Inventor: Alexander Fassbender
  • Patent number: 8491789
    Abstract: Disclosed herein are systems and process integrating the chemical-free oxidation of a photocatalytic decontamination process with a biological decontamination system to eliminate the THM and HAA precursors in drinking water. In one embodiment, a system may comprise a source providing fluid media contaminated with toxic natural organic matter, and a photocatalytic decontamination subsystem configured to oxidize the toxic natural organic matter via a photocatalytic process into non-toxic natural organic matter having a molecular weight low enough for biodegrading said non-toxic matter. The system may include a biological decontamination subsystem configured to immediately receive the contaminated fluid output from the photocatalytic decontamination subsystem, and employing a biological agent to biologically degrade the low-molecular weight non-toxic natural organic matter in the contaminated fluid to a concentration sufficient to prevent the formation of trihalomethanes or haloacetic acids.
    Type: Grant
    Filed: July 30, 2010
    Date of Patent: July 23, 2013
    Inventors: Brian E. Butters, Anthony L. Powell
  • Patent number: 8480902
    Abstract: A method of prevention of acid rock drainage excludes oxygen from waste rocks that contain ferrous sulfides by building an oxygen bio-barrier over exposed surfaces of the waste rock. The bio-barrier may be formed by applying a slurry to the rock. The slurry may contain several components such as microbial material, one or more nutrients, water or another fluid, and optionally water-absorbent material. The microbial material may include bacteria, algae, fungi or a combination thereof. Additionally, the slurry may contain one or more acid-neutralizing compounds, one or more cellulose-containing substances, and one or more UV protecting agents.
    Type: Grant
    Filed: July 2, 2010
    Date of Patent: July 9, 2013
    Assignee: Allegheny-Singer Research Institute
    Inventors: James Christopher Post, Garth David Ehrlich, John William Costerton
  • Publication number: 20130153492
    Abstract: The invention provides a system for treatment of wastewater. A pumping system pumps wastewater from a source basin to a recipient basin, while a conduit allows gravitational flow of water from a source basin to a recipient basin when the pumping system is inactive. A controller activates the pumping system to pump wastewater from the source basin to a recipient basin when a wastewater level in the source basin is at a first predetermined height or when a rate of gravitational flow wastewater from the source basin to the recipient basin is below a first predetermined flow rate. The controller also turns off the pumping system when the water level in the source basin is at a source basin minimal level and the water level in the recipient basin is at a recipient basin maximal level. The invention also provides a method for operating a wastewater treatment of the invention, and a pumping system for use in the system of the invention.
    Type: Application
    Filed: August 24, 2011
    Publication date: June 20, 2013
    Inventor: Gadi Amitai
  • Patent number: 8460547
    Abstract: The present invention refers to a hollow microsphere having a porous circumferential wall comprised of nanofilaments.
    Type: Grant
    Filed: July 14, 2008
    Date of Patent: June 11, 2013
    Assignees: Nanyang Technological University, The Board of Trustees of the Leland Stanford Junior University
    Inventors: Delai Darren Sun, Pei Fung Lee, Xiwang Zhang, Jianhong Du, James O. Leckie
  • Patent number: 8454831
    Abstract: A method for treating wastewater comprises biologically treating the wastewater in a fixed-biomass biological reactor and then treating the wastewater in a ballasted flocculation system. The ballasted flocculation system produces a clarified effluent and sludge containing inert granular material having biomass accumulated thereon and suspended solids. The inert granular material having biomass accumulated thereon is separated from the suspended solids and then cleaned with a cleaning solution. After separating the biomass from the cleaned inert granular material, the cleaned inert granular material is recycled for use in the ballasted flocculation system.
    Type: Grant
    Filed: March 8, 2011
    Date of Patent: June 4, 2013
    Assignee: Veolia Water Solutions & Technologies Support
    Inventors: Phillippe Sauvignet, Kashi Banerjee, Charles D. Blumenschein
  • Patent number: 8431025
    Abstract: The present invention provides an apparatus and method for biologically treating fluids, in particular municipal or industrial wastewater or the like, the apparatus comprising a pair of reservoirs each containing growth medium having a biofilm thereon, the apparatus being arranged to pump the wastewater from one reservoir to another such as to alternatively expose the biofilms within the reservoirs to air and wastewater, thus making it possible to achieve sequential aerobic, anoxic and anaerobic conditions in the biofilms.
    Type: Grant
    Filed: July 7, 2005
    Date of Patent: April 30, 2013
    Assignee: National University of Ireland
    Inventors: Michael Rodgers, Edmond O'Reilly, Xinmin Zhan, Rose C. Mulqueen
  • Patent number: 8425776
    Abstract: A method of in situ treatment of wastewater that is contaminated with a heavy metal may include passing a flow of contaminated wastewater through a reactor vessel. The reactor vessel may contain a plurality of biofilm retaining structures. Each of the structures may at least be partially coated with a biofilm. Additionally, the biofilm may include a plurality of bacteria retained in a matrix and the matrix may include DNA, protein and carbohydrates produced by the bacteria.
    Type: Grant
    Filed: June 22, 2010
    Date of Patent: April 23, 2013
    Assignee: Allegheny-Singer Research Institute
    Inventors: James Christopher Post, Garth David Ehrlich, John William Costerton
  • Patent number: 8425775
    Abstract: A method of in situ treatment of fracture fluid that is contaminated with a heavy metal may include passing a flow of contaminated fracture fluid through a reactor vessel. The reactor vessel may contain a plurality of biofilm retaining structures. Each of the structures may at least be partially coated with a biofilm. Additionally, the biofilm may include a plurality of bacteria retained in a matrix and the matrix may include DNA, protein and carbohydrates produced by the bacteria.
    Type: Grant
    Filed: June 22, 2010
    Date of Patent: April 23, 2013
    Assignee: Allegheny-Singer Research Institute
    Inventors: James Christopher Post, Garth David Ehrlich, John William Costerton
  • Patent number: 8404111
    Abstract: A fluidized membrane bioreactor comprising a bioreactor including biochemically active organisms; fluidized particles which is a support media to be attached by the organisms; and membranes which permit treated water to pass through except the organisms, wherein the fluidized particles are in direct contact with the membranes. The membranes are installed internally or externally to the bioreactor. The particles may be granular activated carbon or other suitable materials. The fluidized particles serve not only as support media for microorganisms, but also as media for sorption or otherwise retention of matter that can cause membrane fouling and as an abrasive material for cleaning the membrane surface.
    Type: Grant
    Filed: January 19, 2012
    Date of Patent: March 26, 2013
    Assignee: INHA Industry Partnership Institute
    Inventors: Jae-Ho Bae, Jeong-Hwan Kim, Perry L. McCarty
  • Patent number: 8404210
    Abstract: An iron composition having a plurality of elemental components is disclosed. The major component is an iron component of at least about 68% to about 92% iron by weight. Other components by weight include manganese; cerium; carbon; phosphorous; sulfur; aluminum; silicon; chromium; copper; and zinc. Combined with layers of sand, brick chips and/or charcoal, the iron composition can be used to create a water filter for filtering inorganic arsenic species and soluble metal ions out of water. To enhance hydrous ferric oxide complexation and precipitation, the iron composition may be treated with food grade acids or a water mixture.
    Type: Grant
    Filed: January 29, 2008
    Date of Patent: March 26, 2013
    Assignee: George Mason Research Foundation, Inc.
    Inventor: Abul Hussam
  • Patent number: 8394272
    Abstract: This invention relates to a method that uses heterothrophic ammonia oxidation bacteria (HAOB) to remove carbon and nitrogen pollutants in wastewater. The method includes the cultivation of the heterotropic bacteria in an activated sludge environment and the removal of carbon and nitrogen from the wastewater. According to the physiological characteristics of HAOB and the principles of combined oxidation of carbon and nitrogen, the method is able to achieve simultaneous removal of carbon and nitrogen under the condition that the cells do not grow. The process is able to be carried out in the temperature range of 6-40° C. No excess sludge is produced in the process. The invention is able to control the process and product composition of anaerobic ammonia oxidation through the control of organic carbon source, and is able to realize zero-accumulation of NO3?N in the nitrification process. The invention can fully utilize existing activated sludge systems to remove carbon and nitrogen.
    Type: Grant
    Filed: August 8, 2007
    Date of Patent: March 12, 2013
    Inventor: Guanghao Peng
  • Patent number: 8388844
    Abstract: Systems and methods are provided for intimately coupling advanced oxidation process (AOP) with biodegradation for the treatment of contaminated water. The system comprises a particulate bed having carrier particles that have a microbial film effective for biodegrading contaminants in the contaminated water. An advanced oxidation reagent is irradiated by a radiation source to provide an advanced oxidation reagent effective for oxidizing recalcitrant compounds in the contaminated water to form biodegradable byproducts. The microbial film is effective for biodegrading the byproducts substantially immediately after they are produced. The carrier particles are also effective for protecting the microbial film from the radiation and/or the recalcitrant compounds.
    Type: Grant
    Filed: August 8, 2008
    Date of Patent: March 5, 2013
    Assignee: Arizona Board of Regents for and on behalf of Arizona State University
    Inventors: Michael Marsolek, Bruce E. Rittmann