Abstract: An efficient combined advanced treatment method of electroplating wastewater is disclosed, which belongs to the technical field of electroplating wastewater treatment. The method includes: after pretreatments including cyanide breaking, dechromization and coagulating sedimentation, introducing the electroplating wastewater to a contact oxidation tank for biochemical treatment, and settling the effluent from the contact oxidation tank down in an inclined pipe of a secondary sedimentation tank to realize the separation of the sludge from water; charging the effluent to a coagulating sedimentation tank, and undergoing coagulating sedimentation with the aid of a flocculant and a coagulant aid added; feeding the effluent, as an influent, to a resin adsorption tank for adsorption with a magnetic resin; and after passing through a filter, flowing the effluent after adsorption to a fixed bed resin adsorption unit, so as to realize the discharge up to standard and recycle of the effluent.

Abstract: Technique to provide an abrasive regeneration method which, from a used abrasive slurry, can recover an abrasive by an efficient method and can thereafter obtain a high-purity regenerated abrasive by a simple method. This abrasive regeneration method uses an abrasive comprising at least one type of abrasive selected from diamond, boron nitride, silicon carbide, alumina, alumina zirconia and zirconium oxide. The abrasive regeneration involves a slurry recovery step (A) for recovering an abrasive slurry discharged from a polishing machine, a separation and concentration step (B) for adding an alkaline earth metal salt as an inorganic salt to the recovered abrasive slurry to aggregate the abrasive, and separating and concentrating the abrasive from a mother liquor, and an abrasive recovery step (C) for recovering the separated and concentrated abrasive.

Abstract: An aeration control valve system may be used with a water treatment system to control aeration and flow of water in accordance with various operating cycles. The aeration control valve system causes air to be pumped or drawn into the water treatment system during an air charge cycle to provide an air charge for aerating the water to facilitate water treatment. The aeration control valve system releases the air during an air release cycle without requiring a backwash cycle. In one embodiment, the aeration control valve system includes a control valve unit configured for connection to a brine tank but instead fluidly coupled to an air intake inlet and an air release outlet for supplying and releasing air, respectively, when the valve cycle actuator is in the brine position and brine tank fill position, respectively.

Abstract: A hydrothermal conversion process includes a mixing step wherein an aqueous slurry of a solid feedstock material with a steam stream to produce a reaction mixture having a temperature of at least 160° C. and which is at a pressure sufficient to keep water as a subcooled liquid. The process is fast and effective, requires only simple equipment and is highly energy-efficient. The process is also readily scalable, can be operated continuously or semi-continuously and can be tailored to produce carbonized solids or liquefaction products, all of which typically have increased economic value compared with the starting materials.

Abstract: The present invention provides an aeration lateral system designated to be site specific for new septic disposal areas or retro fitting to existing septic disposal areas to break up the biological clogging slug mat at the interface of the wastewater and imported sand or native soil fill under or adjacent to disposal areas of a typical septic system. The lateral system provides uniform or other site specific distribution of fluids about the bio-mat of a wastewater disposal area, with lateral spacing and hole spacing varying based on the type of disposal area being utilized. The lateral system can also be utilized to provide continuous low volume air supply system to a wastewater disposal area or peat filter module. The air lateral installation includes methods to minimize airflow disturbance of the soil and methods to prevent air leakage.

Abstract: A method for sequestrating carbon dioxide in the ocean of the present invention coverts carbon dioxide into a high concentration of bicarbonate ions by using a neutralization method using calcium oxide commonly contained in alkaline industrial waste, prepares elution water for stably containing bicarbonate ions even when making contact with the atmosphere through aeration, and discharges the elution water into an area of the ocean of a relatively shallow depth to sequestrate carbon dioxide. According to the present invention, the present invention is a carbon dioxide storage method which uses alkaline industrial waste to carry out carbon dioxide ocean sequestration at relatively low cost, and can sequestrate carbon dioxide for a long time while minimizing bad environmental influences such as ocean acidification and the like, and is thus environmentally friendly.

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.

Abstract: The filter comprises a case and a removing cap mechanically connected by vertical uprights as well as cylindrical filtering net placed between the case and the cap. The case is made as a truncated perforated hollow cone, and a non square full slot along its big bass periphery. The slot forms a continuous contour to place the filtering net end. The uprights are attached to the cap by a set of screws. This version makes the filter durable, reliable and repairable.

Abstract: The described implementations relate to water denitrification. One method obtains nitrate levels in influent and effluent of a moving bed media filter and determines carbon levels in the effluent. The method also doses carbon feedstock into the influent based on both the nitrate levels and the carbon levels.

Abstract: In particular, in alternative embodiments, the invention provides for a method to recover silicofluoride and phosphate species from wastewaters, or barometric condenser waters, that are typically utilized in wet-process phosphoric acid facilities. The species are recovered via a continuous ion exchange approach that allows for economic recovery of the materials and especially with the silicofluoride component allows for the production of valuable industrial materials such as hydrofluoric acid and other fluoride salts as well as industrial-grade precipitated silica materials. Return of the treated waste water to the phos-acid plant allows for optimization of reagent usage.

Abstract: Described herein is a liquid filtration device is disclosed a vessel for treating an aqueous liquid, wherein the vessel contains a filtration medium and wherein the filtration medium comprises a metal sulfide, wherein the sulfur in the form of a metal sulfide is at least 0.5% by weight of the filtration media.

Abstract: The invention provides methods and compositions for reducing the malodorous sulfide gas released by a wastewater treatment system. The method preserves the vitality of waste consuming organisms within the system. The method comprises the steps of: determining the SRP PAA demand of the system, determining the aerobic PAA demand of the system, and adding a composition in an amount such that it is in excess of the SRP PAA demand but is below the aerobic PAA demand. Even though the composition increases the amount of sulfates within the wastewater it reduces the amount of SRP which prevents the malodorous sulfite gas release. The composition comprises at least one percarboxyacid.

Abstract: An aspect of the present invention is generally directed toward an appliance that includes a water source inlet that receives intake water from a water source and a water outlet proximate a water dispensing location on a door of the appliance in fluid communication with one another via one or more water conduits spaced within the appliance. The appliance also includes a removable water filter and dispenser assembly configured to be removably engaged and disengaged with the water outlet of the appliance by hand without the use of tools. The removable water filter and dispenser assembly includes: (1) a housing that includes at least one water treatment media; and (2) a treated water dispensing outlet configured to deliver water treated by the at least one water treatment media for use or consumption.

Abstract: Disclosed is a process for the safe and efficient generation of chlorine dioxide while achieving a variable chlorine dioxide mass flow rate with a turn-down to turn-up ratio of at least 1 to 200. The process allows for a single chlorine dioxide generating system to safely provide variable mass flow rate of chlorine dioxide to applications that have wide ranging chlorine dioxide demand, like those experienced in oil and gas applications.

Abstract: The present invention is directed to a method for the treatment of an environmental medium contaminated with arsenic, comprising treating such medium with an effective amount of persulfate and zero valent iron.

Abstract: Embodiments relate to systems and methods for treating produced water and other contaminated water that can be customized or adapted to particular characteristics of the water and/or its contaminants or other contents while minimizing costs related to treating the water. In an embodiment, a method of treating produced water comprises degrading solid particles in the produced water using beneficial bacteria; filtering solid particles from the produced water; reducing pathogenic bacteria in the produced water by introducing ozone into the produced water; reducing contaminants in the produced water by passing the produced water through at least one filter; reducing salts in the produced water using a reverse osmosis system; and providing treated produced water.

Abstract: A method of treating suspended solids and heavy metal ions in sewage includes (step 1) adding an iron sulfate reagent to a portion of sewage to be treated such that suspended solids therein undergo preliminary precipitation, and then separating the portion of sewage into primarily treated sewage with low turbidity and low density sludge (LDS); (step 2) filling a tank with the LDS, wherein the tank comprises a first inlet and a first outlet above the first inlet; and (step 3) conveying the other portion of sewage to be treated or the preliminarily treated sewage to the tank through the first inlet such that the sewage percolates though the LDS in the tank to fluidize the LDS and bind the suspended solid to the LDS, and in consequence, after percolating through the sludge, the treated sewage exits the tank through the outlet effluent.

Abstract: The invention relates to a water treatment device comprising a mixing tank comprising an inlet path (12) for an effluent to be treated, an optional inlet path (13) for reagents, a stirring source (14) for generating a turbulent stir in a given volume of said tank, an extraction path (15) for discharging sludge, and an extraction path (16) for treated effluent, and further comprising above and adjacent to the given volume, but below the treated-effluent outlet path, a settling structure (17) comprising a plurality of ducts extending from the bottom to the top and arranged in the form of a baffle so that no particle can flow through said layer along a rectilinear path.

Abstract: A method for processing raw liquid manure and/or fermentation residues involves providing raw liquid manure and/or fermentation residues, purifying the raw liquid manure and/or fermentation residues in a first purification stage so as to form a first solid phase and a first purified liquid phase, pre-conditioning the first purified liquid phase in order to separate ultrafine particles from the first purified liquid phase, and purifying the first purified liquid phase in a second purification stage so as to form a second solid phase and a second purified liquid phase.

Abstract: A method for treating water using a salt desorption process of gas hydrates according to the present invention includes: (a) introducing water containing impurities and a plurality of guest gases into a reactor; (b) forming gas hydrates by causing the water and the plurality of guest gases to react under a first condition; and (c) dissociating a gas hydrate of one guest gas from among the plurality of guest gases by changing the first condition to a second condition, wherein the first condition refers to temperature and pressure conditions under which all of the plurality of guest gases form gas hydrates and the second condition refers to temperature and pressure conditions under which the gas hydrate of the one guest gas from the mixed gas hydrates is dissociated.