摘要
以贵阳市城市污水为研究对象,采用MBR脱氮除磷工艺进行了140 d的中试试验。试验结果表明,在无外加碳源的情况下,系统对COD、TN、NH4+-N、TP的去除率分别达到91.9%、78%、99.8%、89%,平均出水分别在26.41、11.8、0.27、0.49 mg.L-1;试验结束时对剩余污泥进行了序批式试验,表明系统中DPAOs/PAOs在39.7%左右,DPAOs的富集强化了系统的除磷效果。出水中的SS质量浓度、浊度及大肠杆菌数量分别小于4 mg.L-1、3 NTU、2个,达到城市杂用水的回用标准。定期采用体积分数0.5%的NaClO药洗有效地抑制了膜的污染,保证了产水的稳定性。
Pilot-scale nutrient-removal membrane bioreactor was used to treat wastewater for 140 days. The test results showed that, in the absence of external carbon source, 91.9%, 78%, 99.8%, 89% removal efficiency of COD, TN, NH4^＋-N, TP, respectively could be obtained ,with the average effluent of 26.41,11.8,0.27,0.49 mg·L^-1 in the system. At the end of the trial, sequencing batch test was performed using the discharged sludge, indicating that DPAOs/PAOs was about 39.7% and enrichment of DPAOs enhanced phosphorus removal. SS, turbidity and E. coli of the effluent were less than 4 mg. L^-1, 3 NTU, 2 L^-1 separately and reached urban sewage reuse standards. Washing the membrane with 0.5% NaCIO regularly inhibited the membrane fouling effectively and ensure the stability of water production.
出处
《水处理技术》
CAS
CSCD
北大核心
2012年第1期101-104,共4页
Technology of Water Treatment
关键词
膜生物反应器
脱氮除磷
污水回用
膜污染
membrane bioreactor
nitrogen and phosphorus removal
wastewater reclamation
membrane fouling
