Hyperhaline Municipal Wastewater Treatment of a Processing Zone through Pilot-Scale A/O MBR, Part II: Nitrogen and Phosphorous Removal

摘要: Abstract An integrated anoxic/aerobic membrane bio-reactor (A/O MBR) was designed to treat hyperhaline municipal wastewater from a processing zone of Tianjin, China. The removal performance the system ammonia nitrogen (NH 3 -N), total (TN) and phosphorus (TP) investigated, contribution microbes pollutant evaluated discussed. adaptability high-loading impact also studied. Experimental results show that efficiencies NH -N TN A/O MBR were approximately 95% 50%-70%, respectively, during four-month investigation period. Very good is mainly contributed microbial degradation. Membrane interception nitrogenous matters insignificant. keep nitrifying bacteria (having long generation cycle) in reactor, thus strengthening removal. Total as high 60%-80%. Such TP unexpected since there only once sludge discharge operation period, traditional biological cannot be achieved. Nontraditional functions (including particle adsorption phosphoric assimilation) insoluble (mainly organic small quantity complex) are main mechanisms system. Moreover, function predominant, therefore concentration reactor increased enhanced.