摘要
为探讨化学絮凝预处理对后续A/O-MBR工艺处理效果的影响,试验分别采用A/O-MBR工艺和化学絮凝—A/O-MBR工艺处理养猪沼液。试验结果表明:通过化学絮凝预处理,A/O-MBR工艺的出水平均COD从292mg/L下降为191 mg/L;MLVSS/MLSS从0.43升高至0.76,污泥活性明显提升。A/O-MBR工艺膜污染较重,反冲洗效果较差,反应器中溶解性微生物产物(SMP)和胞外聚合物(EPS)的含量均高于化学絮凝—A/O-MBR工艺。浓差极化阻力和滤饼层阻力是两工艺膜过滤阻力增加的主要因素。
In order to investigate the influence of chemical flocculation pretreatment on the subsequent MO-MBR process and chemical flocculation--A/O-MBR process, two processes have been used for treating piggery biogas slurry at the same time. The results show that :the average effluent COD concentration of A/O-MBR decreases from 292 mg/L to 191 mg/L after chemical flocculation pretreatment, and MLSS/MLVSS value increases from 0.43 to 0.76. The activity of sludge can be improved greatly. A/O-MBR process has more severe membrane fouling and poor backwash efficacy,more soluble microbial products (SMP) and higher extracellular polymeric substances (EPS) content than that of chemical flocculation--A/O-MBR process are detected in the reactor. Concentration polarization resistance and cake resistance are the main factors of membrane filtration resistance .in these two processes.
出处
《工业水处理》
CAS
CSCD
北大核心
2013年第2期16-19,82,共5页
Industrial Water Treatment
基金
上海市曙光跟踪计划课题(10GG12)
国家"863"计划课题(2009AA062902)
关键词
A
O—MBR
化学絮凝
养猪沼液
膜污染
MO-MBR
chemical flocculation
piggery biogas slurry
membrane fouling