Anaerobe Reinigung von Abwasser

Die vorliegende Erfindung betrifft ein Verfahren zur Reinigung von Abwasser, beispielsweise kommunale Abwaesser, mittels anaerober biologischer Reinigung, Verfahren zur Gewinnung von Biogas aus Abwasser sowie Vorrichtungen zur anaeroben biologischen Reinigung von Abwasser.

WO 2007076953 A1 UPAB: 20070822 NOVELTY - The municipal wastewater purification comprises anaerobic biological purification of the wastewater by using a biomass (15-100 g/l) from psychrophilic microorganisms, concentrating the sludge by separating the wastewater and feeding back the sludge into the anaerobic biological purification. The psychrophilic microorganisms exhibit an optimum temperature of less than 25degreesC. The anaerobic purification takes place as single- or two-step methanization process. The biomass is suspended in the wastewater and is immobilized in a bioreactor (111). DETAILED DESCRIPTION - The municipal wastewater purification comprises anaerobic biological purification of the wastewater by using a biomass (15-100 g/l) from psychrophilic microorganisms, concentrating the sludge by separating the wastewater and feeding back the sludge into the anaerobic biological purification. The psychrophilic microorganisms exhibit an optimum temperature of less than 25degreesC. The anaerobic purification takes place as single- or two-step methanization process. The biomass is suspended in the wastewater and is immobilized in a bioreactor (111). The sludge is concentrated through micro filtration by means of rotation disk filters. Phosphorus precipitates and nitrogen are eliminated from the wastewater after the supply into the anaerobic biological purification. The nitrogen elimination takes place via exchange of the ammonium nitrogen at the zeolite. The zeolite loaded with ammonium-nitrogen is regenerated with regeneration solution. The ammonium-nitrogen is removed from the regeneration solution through air stripping and ammonia is received from the solution. The regeneration solution is again used partly after the air stripping for the regeneration of the zeolite. INDEPENDENT CLAIMS are included for: (1) a procedure for the production of biogas from wastewater; and (2) a device for the anaerobic biological purification of wastewater. USE - For purifying municipal wastewater. The psychrophilic microorganisms are useful for the production of biogas in the wastewater purification and for anaerobic biological wastewater purification (claimed). ADVANTAGE - The wastewater purification shows slight temperature sensitivity and high purification effectiveness in the dismantling of organic impurities.