用复合式膜生物反应器脱氮除磷的试验研究

Nitrogen and phosphorus removals by hybrid membrane bioreactor

研究了用复合式膜生物反应器处理生活污水去除有机物和脱氮除磷的效果,并分析了其性能机理。结果表明:出水中的化学耗氧量(COD)小于50 mg/L,对有机物的去除率为90%;NH4+-N浓度小于3 mg/L,对氨氮的去除率为88%;总磷(TP)浓度小于3 mg/L,对TP的去除率为30%;对悬浮固体(SS)的去除率接近100%。经处理后的水质能满足《生活杂用水水质标准》(CJ25.1-1989)。由于在复合式膜生物反应器前加置了厌氧反应器,出水中的NO2--N、NO3--N明显降低,对TP也有一定的去除效果,说明该生物反应器中的聚磷菌具有较高的摄取磷的能力。

The organic matter removal and nitrogen and phosphorus removals were studied in effluent treatment by hybrid membrane bioreactor（HMBR）. The results showed that for the effluent ρ（COD） 〈 50 mg/L, the removal rate was 90% ;in ρ（NH4^＋ -N） 〈3 mg/L, the removal rate was 88% ; inp（TP） 〈3 mg/L, the removal rate was 30% ; the solid suspension （SS） removal rate was close to 100%. The quality of treated effluent was parallel with the demand of the Miscellaneous Domestic Water Quality Standard（ CJ25.1 -1989）. Anaerobic reactor declined greatly effluent NO2^- - N, NO3^- - N and TP removals. Thus it strengthens phosphorus removal by intestine phosphorus bacterium in HMBR.