城市污水再生利用中的消毒问题研究  

Study on disinfection problems in municipal wastewater reclamation treatment process

作　　者：蒋以元[1] 柯真山[2] 张昱[1] 廖日红[3] 杨敏[1] 

机构地区：[1]中国科学院生态环境研究中心环境水质学国家重点实验室 [2]北京城市排水集团有限责任公司,北京100061 [3]北京市水利科学研究所,北京100044

出　　处：《环境工程学报》2008年第1期16-18,共3页Chinese Journal of Environmental Engineering

基　　金：国家自然科学基金资助项目(20521140076和50238050)

摘　　要：从保障再生水微生物安全的角度，考察了北方某污水处理厂污水处理工艺、混凝沉淀过滤工艺以及臭氧消毒对大肠杆菌和总细菌的去除效果。结果表明，污水处理厂进水中大肠杆菌数和细菌总数分别为10^5-10^9个/L和10^9-10^11个/L，经过厌氧-缺氧-好氧组合工艺处理后两者分别降为10^3-10^6个/L和10^6-10^9个/L，再经后续混凝沉淀过滤工艺（混凝剂PAC投加量：15 mg/L Al2O3）处理，再生水中大肠杆菌和细菌总数仍分别高达10^2-10^5个/L和10^5-10^8个/L。对上述再生水进行臭氧消毒批量实验，在臭氧反应量为12 mg/L的条件下实现了对大肠杆菌的完全灭活，此时臭氧消毒运行费用为0.13元/m^3左右。From the hygienic viewpoint of reclaimed wastewater, the bacterial removal performance of the successive biological wastewater treatment process, coagulation-sedimentation-filtration process and ozonation in a northern municipal wastewater treatment plant （WWTP） was investigated. E. coli and total bacteria in the influent of the WWTP were 10^5 - 10^9 count/L and 10^9 - 10^11 count/L,which were reduced to 10^3 -10^6 count/L and 10^6 - 10^9 count/L respectively following an anaerobic-anoxic-aerobic biological treatment, and 10^2 - 10^5 count/L and 10^5 - 10^8 count/L following the successive coagulation-sedimentation-filtration treatment. Disinfection measures should be taken to satisfy the hygienical requirements for reclaimed wastewater. Ozone was used for the disinfection of the effluent of the reclaimed wastewater, and almost complete inactivation of E. coli could be achieved at an ozone dose of 12 mg/L. The running cost for the complete inactivation of E. coll. is about 0. 13 yuan/m^3.

关 键 词：城市污水 再生水 消毒 大肠杆菌 臭氧 

分 类 号：X703[环境科学与工程—环境工程]