The Robustness of ANAMMOX Communities Treating Full-Scale Sidestream Municipal Anaerobic Digester Filtrate
Abstract:The filtrate or centrate generated at the time of dewatering of the anaerobically digested biomass poses a great operational challenge to wastewater operators as this ammonia nitrogen rich black liquid puts almost 25∼30% extra ammonia nitrogen load to the treatment plant. One option could be to treat this filtrate aerobically and convert all ammonia nitrogen to its oxidized forms. However, this option may not be practically viable due to tremendous energy requirements in the form of aeration and the toxicity of ammonia to bacteria. The use of the anaerobic oxidation of ammonia (ANAMMOX) metabolic pathway may become a promising method for the sidestream removal of ammonia nitrogen from the filtrate. Current challenges inhibiting commercial utilization include extremely long start-up times due to very slow growth rates, reactor configurations suitable to reduce biomass washout, and the general distrust of a new technology. In this article we are reporting the effect of toxic substances on the performance of an ANAMMOX reactor.
Document Type: Research Article
Publication date: January 1, 2011
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