摘要
膜生物反应器中MLVSS为 4 0 0 0～ 50 0 0mg/L时 ,COD的去除率可达 98%左右 ,NH3-N的去除率可达 99%左右。但随SRT的继续延长 ,污泥浓度增加 ,使得内源呼吸加剧和大量微生物死亡 ,导致上清液的COD上升 ,SMP含量增加 ,出水COD存在波动性 (去除率仍在 94 %左右 )。同时SMP的增加会抑制硝化作用 ,NH3-N的去除率会略有下降 ,可维持在 92 %左右。
The removal of COD and NH 3-N in a membrane bioreactor treating synthetic domestic wastewater was about 98% and 99% respectively, when the concentration of MLVSS was 4 000～5 000 mg/L. However with the increase of SRT and MLVSS, the COD concentration of filtrate and Soluble Metabolic Products (SMP) increased due to intensified endogenous respiration and the death of microorganisms. Consequently, there existed fluctuation of effluent COD concentration, but the COD removal rate was still around 94%. At the same time, the increase of SMP inhibited the nitrification, thus the removal rate of NH 3-N dropped to about 92%.
出处
《中国给水排水》
CAS
CSCD
北大核心
2000年第7期16-18,共3页
China Water & Wastewater
基金
"九五"国家科技攻关课题!(96 - 90 9- 0 1- 0 2 - 0 4)
关键词
膜生物
反应器
废水处理
污泥停留时间
出水水质
membrane bioreactor
wastewater treatment
SRT
soluble metabolic products
