Abstract: A method of treating wastewater includes removing BOD and ammonium from the wastewater. The wastewater is directed into a tank where it is mixed with mixed liquor or activated sludge from an activated sludge wastewater treatment system. The mixture of wastewater and mixed liquor or activated sludge forms a mixed liquor stream. The mixed liquor stream is directed to a ballasted flocculation system where suspended solids is removed from the wastewater. This produces a clarified effluent that is directed to a zeolite tank. Clarified wastewater from the ballasted flocculation system is directed into the zeolite tank and mixed with zeolite. Zeolite is effective to remove ammonium from the wastewater. Thus, the process as a whole is effective in removing suspended solids, soluble BOD as a result of mixing the mixed liquor or activated sludge with the wastewater, and ammonium.

Abstract: Described herein are compounds and compositions useful for removing contaminants from water, as well as methods for making and using the compounds and compositions. In one aspect, the compositions contain a source of gallium ions and a polysaccharide such as chitosan, which are inexpensive and safe for the environment.

Abstract: A wastewater treatment system is provided having a reactor, first and second bio media and an aeration system. The first bio medium is located proximate an inlet end of the reactor and extends vertically between a top water level and the reactor's floor. The second bio medium is located proximate an outlet end of the reactor and extends vertically between a bottom water level and the reactor's floor. The media are adapted for retaining solids within the reactor as clarified water is withdrawn after treatment. The first bio media is further adapted to act as a baffle thereby causing wastewater to flow generally uniformly into a primary reactor zone. The aeration system includes a plurality of diffusers, some of which may be located adjacent or underneath the bio media and are adapted for promoting the shaking the bio media when activated in order dislodge excessive biomass therefrom.

Abstract: The invention relates to a method for treating wastewater containing hydrocarbons, in particular hydrocarbons from the group of compounds referred to as BTEX, comprising benzene, toluene, ethylbenzene and xylene aromatic compounds, said wastewater being in particular from the production or conditioning of natural gas, wherein, according to the method, the wastewater is subjected to stripping by the natural gas such that the hydrocarbon pollution is not only removed from the water by means of being transferred to the gas, but also eliminated during the subsequent combustion of the gas. The wastewater to be treated has a soluble BTEX content that is no higher than 1,200 ppm, preferably no higher than 900 ppm, and the weight ratio of the stripping gas to the treated water is less than 10%, the water being discharged from the stripper having a soluble BTEX content that is no higher than 30 ppm.

Abstract: Various embodiments of a modular catch basin for implementation in a high performance bioswale are disclosed. The modular catch basin containing bio-media in bio-media filters to treat urban run-off. Method of installing and maintaining the modular catch basin are also disclosed.

Abstract: The disclosure is directed to compositions, kits, and methods for performing colorimetric analysis. A composition for a colorimetric assay can be prepared that includes an aromatic amine chromogenic substrate and a zwitterionic solubilization reagent that is N,N,N-trimethylglycine (betaine). The zwitterionic solubilization reagent is highly useful as a non-encapsulating solubilization reagent and provided faster kinetics and increased dye content of an aromatic amine chromogenic substrate in an enzymatic reaction. In turn, this can result in improvements in detection of an analyte in a sample and also can increase the sample throughput. The aromatic amine chromogenic substrate and N,N,N-trimethylglycine solubilization reagent can be used in assays such as ELISAs in order to provide a more accurate and faster detection of analytes in a biological sample.

Abstract: A filter element has a pleated composite and first and second end elements mounted to opposite first and second ends of the filter element. The pleated composite has a filter medium layer and a grooved mesh drainage layer pleated with the filter medium layer. The grooved mesh drainage layer has a plurality of strands and a plurality of grooves formed in the strands. The grooved mesh drainage layer directs fluid via the grooves to or from the filter medium layer and the filter medium layer removes one or more substances from fluid flowing through the filter medium layer.

Abstract: The inventive process scheme and its various embodiments described herein will comprise filtering a selenium containing water by reverse osmosis or nanofiltration to produce a primary permeate stream at least meeting the water stream effluent discharge requirements of the location and a concentrate stream containing the removed selenium and other species, a RO or NF concentrate treatment specific to the case which will treat and reduce the selenium content of the concentrate, optionally in conjunction with a sulfate removal process, and result in a highly concentrated sludge or other output, and a selenium depleted aqueous overflow stream, a portion of which will be combined with the primary permeate stream so that the selenium content of the combined stream does not exceed the local requirement, and the reminder of the selenium depleted aqueous overflow stream will be returned to be combined with the selenium containing water entering the inlet of the primary reverse osmosis treatment.

Abstract: A coupling bioreactor in the form of a tower type seal structure filled with a suspended carrier. A water inlet pipe, an air inlet pipe, and a first microporous aerator are arranged at the bottom of the coupling reactor. The water inlet pipe is connected to a water distributor. The air inlet pipe is connected to the first microporous aerator. A gas inlet pipe and a second microporous aerator are arranged at the middle part of the coupling bioreactor and are connected with each other. An annular overflow weir is arranged at the upper part of the coupling bioreactor and is connected to a water outlet pipe. A gas outlet pipe is arranged at the top of the coupling bioreactor. The ratio of the height to the diameter of the coupling bioreactor is between 3 and 10.

Abstract: There is disclosed a unique water treatment system which incorporates a unique primary valve. The primary valve comprises an interconnected first part and second part. The first part attaches to a water source and provides untreated water to water treatment units which are controlled by the second part of the primary valve. Untreated water flows to a first water treatment unit and subsequently through a valve to the second part of the primary valve and to use or to a second water treatment unit. From the second water treatment unit the water flows to the second part of the primary valve and to use. The second part of the primary valve has a unique bore and slideable shaft valve structure. The water treatment units can purify the water and/or add substances to the water.

Abstract: A filter arrangement for threadably securing to a filter head includes a housing having a surrounding wall defining an interior volume, an open mouth providing access to the interior volume and an end opposite of the open mouth. The surrounding wall has an exterior and an interior. A filter media construction is operably held within the interior volume. A sleeve, distinct from the housing, is secured to the exterior of the surrounding wall adjacent to the housing mouth and extending partially along the surrounding wall. The sleeve has an exterior and an interior. The exterior of the sleeve defines mounting threads constructed and arranged to removably mount with the filter head, when the filter arrangement is secured to the filter head. The interior of the sleeve is against the exterior of the surrounding wall. A first seal member is oriented against the sleeve to create a seal with a filter head, when the filter arrangement is secured to the filter head.

Abstract: A filter arrangement for threadably securing to a filter head includes a housing having a surrounding wall defining an interior volume, an open mouth providing access to the interior volume and an end opposite of the open mouth. The surrounding wall has an exterior and an interior. A filter media construction is operably held within the interior volume. A sleeve, distinct from the housing, is secured to the exterior of the surrounding wall adjacent to the housing mouth and extending partially along the surrounding wall. The sleeve has an exterior and an interior. The exterior of the sleeve defines mounting threads constructed and arranged to removably mount with the filter head, when the filter arrangement is secured to the filter head. The interior of the sleeve is against the exterior of the surrounding wall. A first seal member is oriented against the sleeve to create a seal with a filter head, when the filter arrangement is secured to the filter head.

Abstract: The present invention provides a method of detecting or measuring trans-Resveratrol (tRV) in a sample, comprising: contacting a sample to be tested with an antibody against tRV, or an antigen binding fragment of such an antibody; and detecting or measuring any tRV bound by the antibody or antibody fragment. The invention also provides an antibody against trans-Resveratrol.

Abstract: A single step pretreatment of wastewater or recreational water is provided comprising treatment with nanocomposites consisting of an anchoring particle such as a clay mineral and one or more polymers.

Abstract: There is disclosed a trash rake system for use in clearing debris from an intake screen of an intake trash rack of a water intake port of a water use facility. The intake screen is configured to collect debris transported by water, for example, a river, to prevent the debris from entering the intake port of the water use facility. The trash rake system includes a track system, a movable support structure, a rack and pinion drive mechanism, and a controller configured to receive signals from an encoder on a drive motor and a proximity sensor system.

Abstract: Methods, devices and kits for the physical separation of plankton into its component parts utilizing phototactic behavior are described. The methods utilize positive phototactic behavior and negative contrast orientation of the zooplankton for maximal in situ separation of phytoplankton and zooplankton for use in further studies and evaluation of separation efficiency. The devices provide effective conditions for use in the separation of plankton into component parts.

Abstract: In one embodiment, a method includes gasifying a fuel source using a first oxygen stream supplied from an air separation unit (ASU), discharging a gasifier blowdown from a gasification and scrubbing system configured to gasify the fuel source, generating a grey water from the gasifier blowdown, and biologically treating the grey water in a reactor using a second oxygen stream supplied by the ASU.

Abstract: A washing method of red mud that is produced when an alumina-containing ore having a goethite to hematite mass ratio of 60/40 (goethite/hematite) or more in the iron component thereof is heat-treated with an alkaline solution at a temperature of 110° C. to 160° C. to obtain an aluminate liquor, including: mixing the red mud with a diluting fluid to obtain suspension that has an aluminum concentration of 95 g/L or less in terms of Al2O3; adding a flocculant to the suspension, wherein, the flocculant includes a polymer having a repeating unit derived from (meth)acrylic acid or a salt thereof and being substantially free from a repeating unit derived from vinylhydroxamic acid compound or a salt thereof; and settling and separating the red mud so as to wash the red mud.

Abstract: A method of controlling sulfides in water systems is disclosed which includes injecting 9,10 anthraquinone into the water system and injecting a nitrate or nitrite into the water system.

Abstract: Apparatus and process is provided for hydrolyzing sludge from water treatment and for conditioning the hydrolyzed sludge for optimal anaerobic digestion. Methods provided include dewatering to produce dewatered sludge, hydrolyzing the dewatered sludge in a steam fed process, preheating the dewatered sludge before hydrolysis with sludge-to-sludge heat transfer, and cooling and diluting the sludge using sludge-to-water heat transfer and water injection, and anaerobically digesting the hydrolyzed sludge. Apparatus provided includes a generally vertically oriented counterflow sludge-to-sludge heat exchanger, a hydrolysis reactor and associated source of steam, sludge-to-water heat exchangers, and a dilution unit. Temperature and pressure sensors are configured to command various variable flow pumps and valves for controlling the process.