Abstract: Disclosed herein is a high efficiency apparatus for treating nitrogen and phosphorous in sewage. The apparatus includes a sludge denitrification tank supplying sludge to an anaerobic tank.

Abstract: This invention presents a newly discovered, novel strain of Bacillus bacteria that produces lipase enzymes for the degradation of oleaginous materials such as fats, greases and cooking oils, protease enzymes to degrade proteins and amylases to break down starch. This novel strain and the enzymes produced thereby have a number of applications, including wastewater treatments, agricultural uses, laundry and dish detergents, drain cleaners and spot removers, among others.

Abstract: An improved method for in situ microbial filter bioremediation having increasingly operational longevity of an in situ microbial filter emplaced into an aquifer. A method for generating a microbial filter of sufficient catalytic density and thickness, which has increased replenishment interval, improved bacteria attachment and detachment characteristics and the endogenous stability under in situ conditions. A system for in situ field water remediation.

Abstract: The present invention comprises a method for biological oxidation of nitrogen in water, e.g., wastewater, nitrification, by using ammonia-rich water for the selection and enrichment of nitrifying micro-organisms in a separate aerated reaction volume, where organic matter already has been reduced. The nitrifying micro-organisms will get a competing edge compared to other species, as they are being able to obtain energy from the oxidation of ammonia into nitrate. The method can be applied to the activated sludge process by the introduction of a sludge aeration zone on the recycled sludge, and also be combined with a sludge anoxic zone, for denitrification, enabling a more reliable operation of biological nitrogen as well as phosphorus removal, by maximal use of reaction volumes with lower detention time and lower costs. It can also be applied to a fixed bed process.

Abstract: A wastewater treatment apparatus for removing nitrogen and phosphorus contained in wastewater, and a method therefor. The wastewater treatment apparatus includes an anaerobic/anoxic reaction tank having multiple compartments partitioned by a plurality of partitions, each compartment receiving wastewater and a carbon source; an aeration tank for removing phosphorus by luxury uptake of phosphorus from the treated wastewater flowed from the last compartment of the anaerobic/anoxic reaction tank, using oxygen as an electron acceptor; and a settling tank for settling a sludge from the treated wastewater passed from the aeration tank, and returning the settled sludge into the anaerobic/anoxic reaction tank. The wastewater treatment apparatus can increase removal efficiencies of nitrogen and phosphorus contained in the wastewater, even at a low temperature. Also, the retention time in the reaction tank is reduced, so the size of the reaction tank is reduced, thereby lowering construction costs.

Abstract: A wastewater treatment device is provided, comprising a first chamber having an influent line for delivering untreated wastewater into the first chamber, wherein the first chamber further includes a first plurality of vertically staggered contact screens below the influent line; a second chamber, fluidically connected to the first chamber by a first transfer conduit for delivering wastewater from the first chamber into the second chamber, wherein the second chamber further includes a second plurality of contact screens; a third chamber, fluidically connected to the second chamber by a second transfer conduit for delivering wastewater from the second chamber into the third chamber, wherein the third chamber further includes an alkaline polish medium; an aeration device disposed within the first chamber for distributing air into the wastewater in the first chamber; and a bioliquid distribution device, fluidically connected to the influent line, comprising a liquid containing select bacteriological and enzymatic

Abstract: A vessel (10) for placement on a land site for treatment of wastewater, in which an inlet (22) communicates wastewater, grit, and suspended solids into a grit collecting chamber (24) for settling grit particulates therefrom. An aeration zone (34) receives air from nozzles (37) for facilitating biological digestion of the suspended solids and conversion to activated sludge. The activated sludge communicates through an airlift (70) to a mixing chamber (30) which also receives wastewater with suspended solids from the grit collecting chamber. The air from the nozzles (37) creates an upflow of wastewater and activated sludge to secondary clarifiers (42) having sludge receiving plates (48) on which the sludge settles, accumulates, and falls from, resulting in treated water in the upper portions of the secondary clarifier (42). The treated water discharges in a trough (62) from the vessel (10). A method of sanitary treating of wastewater is disclosed.

Abstract: A biological treatment of wastewater from intermittent and/or sporadic sources is described. The process includes the step of: maintaining treated wastewater effluent and biomass in a quiescent state without stirring, aeration or agitation during biomass starvation wherein said biomass retains the capacity for biological wastewater treatment following the period of prolonged biomass starvation.

Abstract: The present invention is generally directed to a process and system for treating animal waste. More particularly, the present invention is directed to a process and system for treating animal waste effluent with ozone to decompose the organic material within and improve the odor of the animal waste. The process of the present invention also reduces biochemical oxygen demand, chemical oxygen demand, total bacterial content and coliform bacterial count of the animal waste. The process of this present invention comprises collecting an animal waste solution, containing a mixture of water and animal fecal material; contacting the waste solution with ozone in an amount sufficient to oxidize at least a portion of the organic material contained within; and feeding the ozone treated waste solution to a solids separating device prior to collecting the waste solution in a biobasin or, alternatively, recycling the ozone treated waste solution for use as a source of irrigation or flushwater.

Abstract: A filler-packing apparatus comprises a bundled filler-receiving space assembly, a movable bottom stopper assembly having bottom stoppers which are insertable into bottom openings of the filler-receiving spaces of said assembly, and top stoppers which are respectively insertable into top openings of the filler-receiving spaces and enabling packing filler in a plurality of columns in a short period of time. A filler-packing method uses this apparatus and thereby enables packing of the filler into the filler-receiving spaces in short period of time uniformly. An assembly of columns is uniformly packed with a filler and assembled by using the filler-packing apparatus and the filler-packing method.

Abstract: An anaerobic process for digesting organic waste solids to produce residual solids having low levels of pathogens so as to meet regulatory Class A requirements involves a pasteurization step to reduce pathogen levels and digestion of the pasteurized material to reduce the solids volume.

Abstract: An apparatus for aerating water contained at a dam site includes a force main pipe for receiving water from a dam site water reservoir therethrough and a dam aeration assembly in communication with the force main pipe. The dam aeration assembly, via an array of aerators, aerates water delivered from the force main pipe and introduces the aerated water into a dam site discharge waterway.

Abstract: A method of determining denitrification time for at least a portion of wastewater in a wastewater treatment process including isolating a wastewater sample from the wastewater in the wastewater treatment process; detecting changes in fluorescence emitted by NADH from microorganisms contained within the sample; detecting changes in pH of the sample; analyzing the changes in NADH and pH and establishing that the sample is denitrified at a point where NADH shifts from a steady state or a decreasing state to an increasing state and, substantially simultaneously, the pH shifts from a steady state or an increasing state to a decreasing state; and calculating elapsed time between when the sample was taken and when the sample was denitrified to determine the denitrification time for the portion of the wastewater treatment process.

Abstract: A process of treating a liquid waste containing organic matters, which includes contacting, in a digestion zone maintained in anaerobic conditions, the liquid waste with bacterial granules of (a) acid fermentation bacteria and/or methane-producing bacteria and (b) phototrophic bacteria, while irradiating the bacterial granules with light, to digest the organic matters and to proliferate the phototrophic bacteria.

Abstract: A wastewater treatment system which comprises a tank having defined therein an aerobic treatment zone and a suspended micromedia zone. One embodiment further includes an anaerobic treatment zone. The suspended micromedia zone includes a separating media. Substantially continuous aeration is provided to energize the separating media and cause it to be stirred up into a water column within the tank. The air flow provides partial suspension of the separating media and imparts continual upward motion to the wastewater in such zone. A chimney is provided above a portion of the suspended micromedia zone and extends above the aerobic treatment zone. The mixed liquid and air rising due to the aerator air flow travels within the chimney into the aerobic treatment zone. Some separating media also travels within the chimney into the aerobic treatment zone. Aerobic bacteria is provided in the aerobic treatment zone external of the chimney.

Abstract: A self-contained wastewater treatment system is provided, comprising a vessel having a bottom, side walls and a lid defining a hollow interior for containing wastewater, the vessel being adapted for installation underground; an influent line; an effluent line; and a baffle disposed within the interior, generally between the influent line and the effluent line and extending transversely toward opposing side walls of the vessel. The baffle includes a bottom edge separated by a predetermined distance from the bottom of the vessel to define a flow opening. The position of the baffle defines an upstream aeration chamber and a downstream clarifier chamber within the vessel. The side walls include a downstream end wall, the downstream end wall having a lower inclined wall which intersects the bottom of the vessel adjacent the flow opening.

Abstract: An alternating anaerobic contact system for treating wastewater through an apparatus including one enclosed vessel partitioned into two or more enclosed chambers wherein each chamber is flow connected to other chambers by conduits or an apparatus including two or more enclosed vessels wherein each vessel is flow connected to other vessels by conduits. Each apparatus comprises at least one conduit which allows for (1) an anaerobic liquor to flow between a pair of chambers or vessels and (2) for treated wastewater to be separated and collected from the anaerobic liquor. Each apparatus overcomes the degassification problems common to anaerobic contact processing by assuring that the partial pressures of each chamber or vessel remain consistent. Each apparatus, furthermore, performs the settling stage of anaerobic contact processing in either a separate chamber or vessel thereby eliminating the need for external tankage, pumps, and piping.

Abstract: A composition for treating nutrient deficient wastewater from a paper-making process, which eliminates the use of conventional treatments and efficiently provides essential nutrients for biologically degrading organic pollutants, comprising urea and phosphoric acid. A method for treating nitrogen and phosphorus deficient wastewater with a treatment composition of urea and phosphoric acid in varying concentrations depending on the nitrogen and phosphorus content of the wastewater.

Abstract: Process for removing nitrogenous compounds, in particular nitrates, and for remineralizing water with a low mineral content, characterized in that the removal of the nitrogenous compounds and at least partial remineralization of the untreated water are carried out simultaneously by biological treatment, in the same reactor. The denitrified and remineralized water is then subjected to coagulation, flocculation and clarification treatments.

Abstract: A process for the separation of a mixture of waste. In order to improve such a process, the mixture is treated biologically, namely composted and/or stabilized under forced ventilation. The components of the mixture are subsequently separated into a combustible fraction and a non-combustible fraction, whereby the non-combustible fraction contains less than 5% organic substances.