生物膜法A^2/O^2工艺处理焦化废水的中试研究  

Pilot-scale research on coking wastewater treatment by biofilm A^2/O^2 process

作　　者：李亚新[1] 赵义[1] 岳秀萍[1] 杨怀旺 杜金成 姚润生 马健安 

机构地区：[1]太原理工大学环境科学与工程学院,太原030024 [2]临汾同世达实业有限公司,临汾041000

出　　处：《给水排水》2007年第7期59-61,共3页Water & Wastewater Engineering

基　　金：山西省科技攻关项目(2006031104-02)。

摘　　要：以焦化厂废水处理系统气浮设备出水为试验用水,研究了生物膜法A^2/O^2工艺(厌氧—缺氧—好氧—好氧)处理焦化废水的工艺特性和效果。厌氧和缺氧反应器为以陶粒为填料的上流式滤池,一级好氧反应器为以塑料空心球为填料的生物接触氧化池,二级好氧反应器为以陶粒为填料的上流式曝气生物滤池。试验表明,进水COD_(Cr)为1000～2200mg/L,NH_3-N为200～400mg/L,厌氧反应器HRT为20h,缺氧反应器HRT为24h,两级好氧反应器HRT均为48h,二级好氧反应器硝化液回流比为3时,出水COD_(Cr)≤100mg/L,NH_3-N≤15mg/L,COD_(Cr)和NH_3-N可以同时达到《污水综合排放标准》(GB 8978—1996)的一级排放标准。A pilot-plant of biofilm A2/O2 （anaerobic/anoxic/oxic/oxic） process treating air-flotation outflow in coal-coking wastewater system was conducted to study the process characteristics and the treatment efficiency. Ceramic pellets were packed in the anaerobic and anoxic reactors with an upflow-filter mode. Hollow plastic balls were packed in the first aerobic reactor, and ceramic pellets were packed in the second aerobic reactor. During the trial of the biofilm A2/O2 process, the influent CODcr varied between 1 000 and 2 200 mg/L, and the influent NH3--N concentration fluctuated between 200 and 400 mg/L. The experimental research showed that the effluent could reach the discharge standards （CODcr≤100 mg/L, NH3-N≤15 mg/L as required by GB 8978-1996） without any dilution, at HRT-20 h, 24 h, 48 h and 48 h in the anaerobic, anoxic, first aerobic and second aerobic reactors respectively and at a nitrifying recirculation ratio of 3.

关 键 词：焦化废水 生物膜法 A2/O2工艺 

分 类 号：X784[环境科学与工程—环境工程]