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5582732 Biological method of waste water treatment
Biological Waste Treatment and Pollution Control
preferably after the reagents, in a flowrate ratio of at least 2/1. The dilute flocculated water is caused to flow through a bed of sludge in the form of such dense and granular floc and denitrifying bacteria. The bed is subject to turbulent but intermittent agitation. A denitrified effluent is recovered. This denitrified effluent is caused to flow through a biological filter or preferably through a fluidized bed containing nitrifying bacteria and into which oxygen or air is injected. A clarified effluent is obtained, some of which is recycled as the diluting water.
5582732 BIOLOGICAL METHOD OF WASTE WATER TREATMENT M a t Huazhong; Lourenco Jose J Edmonton, CANADA Assigned to Aquatex Corporation A method of treating waste water is described. Firstly, providing specially acclimatized microbial consortia with relatively low sensitivity to changes in pH and changes in temperature, such that the microbial consortia is capable of metabolizing contaminants efficiently within a predetermined broad pH range and broad temperature range. Secondly, maintain the microbial consortia in a space limited and a subsWate limited mode within an immobilized bioreactor operating within the predetermined pH range and the predetermined temperature range. Thirdly, introduce waste water with liquified insoluble organic contaminants into the immobilized bioreactor. The organic contaminants are metabolized by the microbial consortia working under space limited and substrate limited conditions, thereby treating the waste water with a minimal sludge production rate.
5582734 OXIDATION DITCH MODIFICATION AND AUTOMATED CONTROL SYSTEM FOR NITROGEN REMOVAL AND SLUDGE SETTLING IMPROVEMENTS Coleman Thomas E; Denham W Bren; Fleischman Darrel S; Stensel H Davi Yakima, WA, UNITED STATES Assigned to Stensel H Davi A method for treating municipal wastewater in an oxidation ditch activated sludge system by automated determination of the nitrogen depletion inflection point, which enables anoxic cycles to be utilized to achieve improved settling of the activated sludge by providing selective pressure against the growth of filamentous bacteria, by providing improved total nitrogen removal, by providing energy savings and by providing recovery of alkalinity.
5582733 METHOD AND INSTALLATION FOR PURIFYING WATER USING VARIABLY AGITATED DENITRIFYING PHYSICAL-CHEMICAL SLUDGE Desbos Gilber; Rey Philippe; RogaUa Frank Maisons Laffitte, FRANCE Assigned to Omnium de Traitements et de Valorisation
5583045
To purify untreated water, for example waste water, containing organic pollution, materials in suspension and nitrogen-containing pollution, reagents are added under conditions adapted to coagulate all of the materials in suspension, including colloidal materials, to form granular physical/chemical floc. Diluting water is added,
COMPOST CURING AND ODOR CONTROL SYSTEM Finn Larry J Gladewater, TX, UNITED STATES Assigned to Bedminster Bioconversion Corporation 803
preferably after the reagents, in a flowrate ratio of at least 2/1. The dilute flocculated water is caused to flow through a bed of sludge in the form of such dense and granular floc and denitrifying bacteria. The bed is subject to turbulent but intermittent agitation. A denitrified effluent is recovered. This denitrified effluent is caused to flow through a biological filter or preferably through a fluidized bed containing nitrifying bacteria and into which oxygen or air is injected. A clarified effluent is obtained, some of which is recycled as the diluting water.
5582732 BIOLOGICAL METHOD OF WASTE WATER TREATMENT M a t Huazhong; Lourenco Jose J Edmonton, CANADA Assigned to Aquatex Corporation A method of treating waste water is described. Firstly, providing specially acclimatized microbial consortia with relatively low sensitivity to changes in pH and changes in temperature, such that the microbial consortia is capable of metabolizing contaminants efficiently within a predetermined broad pH range and broad temperature range. Secondly, maintain the microbial consortia in a space limited and a subsWate limited mode within an immobilized bioreactor operating within the predetermined pH range and the predetermined temperature range. Thirdly, introduce waste water with liquified insoluble organic contaminants into the immobilized bioreactor. The organic contaminants are metabolized by the microbial consortia working under space limited and substrate limited conditions, thereby treating the waste water with a minimal sludge production rate.
5582734 OXIDATION DITCH MODIFICATION AND AUTOMATED CONTROL SYSTEM FOR NITROGEN REMOVAL AND SLUDGE SETTLING IMPROVEMENTS Coleman Thomas E; Denham W Bren; Fleischman Darrel S; Stensel H Davi Yakima, WA, UNITED STATES Assigned to Stensel H Davi A method for treating municipal wastewater in an oxidation ditch activated sludge system by automated determination of the nitrogen depletion inflection point, which enables anoxic cycles to be utilized to achieve improved settling of the activated sludge by providing selective pressure against the growth of filamentous bacteria, by providing improved total nitrogen removal, by providing energy savings and by providing recovery of alkalinity.
5582733 METHOD AND INSTALLATION FOR PURIFYING WATER USING VARIABLY AGITATED DENITRIFYING PHYSICAL-CHEMICAL SLUDGE Desbos Gilber; Rey Philippe; RogaUa Frank Maisons Laffitte, FRANCE Assigned to Omnium de Traitements et de Valorisation
5583045
To purify untreated water, for example waste water, containing organic pollution, materials in suspension and nitrogen-containing pollution, reagents are added under conditions adapted to coagulate all of the materials in suspension, including colloidal materials, to form granular physical/chemical floc. Diluting water is added,
COMPOST CURING AND ODOR CONTROL SYSTEM Finn Larry J Gladewater, TX, UNITED STATES Assigned to Bedminster Bioconversion Corporation 803