化工学报2011，Vol.62Issue(7)：2042-2048,7.DOI:10.3969/j.issn.0438-1157.2011.07.038
低DO协同负荷引发的黏性膨胀和丝状菌膨胀
Activated sludge bulking initiated by cooperation of low DO and sludge loads
摘要
Abstract
The SVI, sludge bulking type, SOUR, the denitrification and dephosphorization efficiency,SND rate of activated sludge system were investigated in a sequencing batch reactor (SBR) at low DO loading (＜0. 5 mg · L-1), pH 7.2-8.0, temperature (23-4-0.5)℃, MLSS 3000-3500 mg· L-1. The results showed that at low DO levels, the bulking of sludge is not observed at load of 0.22 g COD · (g MLSS)-1 · d-1, while the deterioration of SVI accelerates and type of sludge bulking changes with the increase of sludge loads. At 0. 66 g COD · (g MLSS) -1 · d-1 loading, non-filamentous bulking of activated sludge is observed and the denitrification and dephosphorization efficiency goes down, but at 0.44 g COD- (g MLSS)-1 · d-1 filamentous bulking takes place, the denitrification and dephosphorization efficiency keeps well, the rate of phosphorus absorption is faster, and SS in effluent is almost negligible. The SND rate is the maximum at no bulking of activated sludge, medium at having non-filamentous bulking, and minimum at filamentous bulking. If SOUR was over-high it is very possible to droop sludge settleability and to deteriorate water quality in effluent.关键词
低D0/负荷/黏性膨胀/丝状菌膨胀/SOUR/SNDKey words
low DO/ sludge load/ non-filamentous activated sludge bulking/ filamentous activated sludge bulking/ SOUR/ SND分类
资源环境引用本文复制引用
桂丽娟,彭永臻,甘冠雄,彭赵旭,侯红勋,王淦,史昊然..低DO协同负荷引发的黏性膨胀和丝状菌膨胀[J].化工学报,2011,62(7):2042-2048,7.基金项目
国家自然科学基金项目(50778005) （50778005）
城市水资源与水环境国家重点实验室开放基金项目(QAK201006). （QAK201006）
