【摘要】 针对城市污水处理,提出了膜-生物反应器(MBR)强化脱氮除磷工艺,并开展了近3个月的中试。试验结果表明,COD、总氮、氨氮及总磷去除率分别达到86.5%、69.3%、98.0%及81.0%,平均出水COD、总氮、氨氮及总磷质量浓度分别为26、9.3、0.44、0.44 mg.L-1,达到国家一级A排放标准;内源反硝化、反硝化除磷及同步硝化反硝化现象的共同存在使工艺的脱氮除磷性能得到整体强化;蛋白质和多糖是膜污染的主要有机成分,采用次氯酸钠溶液定期清洗可维持MBR强化脱氮除磷工艺的稳定运行。更多还原

【Abstract】 To treat municipal wastewater,the enhanced nitrogen and phosphorus removal MBR process was suggested and tested for nearly three months in this pilot study.The removal ratios of COD,total nitrogen,ammonia and total phosphorus were 86.5%,69.3%,98.0% and 81.0%,respectively.The average concentration of COD,total nitrogen,ammonia and total phosphorus in effluent were 26,9.3,0.44 and 0.44 mg·L-1,which meet the I-A wastewater discharge standards of China.The nitrogen and phosphorus removal capability of the process was stabilized and enhanced due to the cooperative contribution of endogenous denitrification,denitrification phosphorus removal and simultaneous nitrification-denitrification mechanisms.Protein and polysaccharide were main organic components in membrane fouling substances.The process was operated stably with regular cleaning by NaClO solution.更多还原