Abstract: In a wastewater treatment process or other water treatment process, wherein ceramic membranes are employed to filter liquid not being treated in a biological process, ozone gas is injected and dissolved into the membrane influent for the purpose of preventing fouling of the membranes, while also enhancing pathogen removal. Ozone concentration as injected is at a concentration greater than 2 mg/l, preferably at least about 5 mg/l.

Abstract: Phagotrophic algae are used in connection with aerobic or anaerobic digestion of solids, especially waste activated sludge (WAS), to more efficiently digest solids and to meet, over a shorter period of time, volatile solids standards and specific oxygen uptake rate requirements as well as pathogen reduction requirements.

Abstract: Phagotrophic algae are used in connection with aerobic or anaerobic digestion of solids, especially waste activated sludge (WAS), to more efficiently digest solids and to meet, over a shorter period of time, volatile solids standards and specific oxygen uptake rate requirements as well as pathogen reduction requirements.

Abstract: In a wastewater treatment plant, the liquid side of the plant has preferably four stages for nitrification and/or denitrification, prior to further treatment such as a clarifier. Energy requirements are reduced by reducing aeration requirements. Four or more tanks/zones comprise serial anoxic and aerobic stages, but in the anoxic stages simultaneous nitrification/denitrification takes place in accordance with the known process of U.S. Pat. No. 5,906,746. By this arrangement the system can achieve a volume ratio of about 20% aerobic tankage to the total tankage volume, as compared to a much higher ratio in a typical prior art system of serial aerobic/anoxic stages, and greatly reducing aeration requirements.

Abstract: A sewage treatment plant, on the liquid side, is operated so as to effect nitrification and denitrification within a single tank and simultaneously to remove water, without the need for separate clarification. An aerobic/anoxic zone is maintained in a single tank, wherein the SymBio process of U.S. Pat. No. 5,906,746 is maintained. This is combined with the advantages of an MBR process, by placing a series of membrane separators within the tank and continuously withdrawing nearly pure water. Supplemental process air provided in the MBR tank is controlled by the SymBio process to maintain simultaneous nitrification and denitrification in a single tank and thus reducing the additional process air requirements.

Abstract: In the liquid side of sewage treatment process, a combination aerobic/anoxic stage is closely monitored such that phosphorus can be removed as well as nitrogen. As in a known process, the aerobic/anoxic stage is monitored as to a coenzyme of the active bacteria. When the bacteria of flocs within this stage show a switch to anaerobic condition via such coenzyme, the low dissolved oxygen level in the stage is maintained for a preselected period of time or to a preselected extent of the anaerobic condition, before oxygen is added. This somewhat brief anaerobic condition within the flocs is sufficient to release significant amounts of phosphorus into the liquid. When aeration then is increased, enhanced biological phosphorus uptake is effected. A small aerobic stage is included after the aerobic/anoxic stage to ensure maximum phosphorus uptake, and in one embodiment this stage includes a membrane separator, allowing downstream secondary clarification to be eliminated.

Abstract: The present invention provides compositions and methods for controlling fecal odor production that develops from agricultural waste which accumulates because of the scale of hog and chicken farming. The compositions for controlling odor in waste comprise isolates of Pseudomonas sp. that assimilate ammonia, degrade skatole and reduce COD. The present invention further provides methods for controlling odors in animal waste storage facilities using the abovementioned Pseudomonas sp. compositions.

Abstract: The present invention provides compositions and methods for controlling fecal odor production that develops from agricultural waste which accumulates because of the scale of hog and chicken farming. The compositions for controlling odor in waste comprise isolates of Pseudomonas sp. that assimilate ammonia, degrade skatole and reduce COD. The present invention further provides methods for controlling odors in animal waste storage facilities using the abovementioned Pseudomonas sp. compositions.

Abstract: A composition and method for preserving Pseudomonads is described. The composition includes an alkali metal nitrate, and optionally monoammonium phosphate as a buffer in an aqueous solution to preserve the bacteria. The compositions are useful for bioremediation.