A/O-混凝沉淀工艺处理酚、氰废水工程实例研究  

Study on A/O Coupled with Flocculation-Sedimentation Process for Phenol and Cyanide Wastewater Treatment

作　　者：张晓辉[1] 皮科武[2] 

机构地区：[1]北京电子科技职业学院生物系,北京100029 [2]湖北工业大学化学与环境工程学院,湖北武汉430068

出　　处：《环境科学与管理》2009年第11期76-78,共3页Environmental Science and Management

基　　金：北京电子科技职业学院自然科学基金(08KK007);北京市职业院校教师素质提高工程项目

摘　　要：采用后继混凝沉淀的A/O工艺对含酚、氰的焦化废水进行了处理,运行结果表明：当A段停留时间为7h,DO低于0.3 mg/L;O段停留时间为7 h,DO为3.5 mg/L;絮凝阶段聚合氯化铝铁（PACF）投加量为1012.3mg/L,聚丙烯酰氨（PAM）投加量为4.2 mg/L,絮凝沉降时间为1.5 h时,废水中酚含量从288-680 mg/L降至1.0 mg/L以下,氰化物含量从0.73-11.3 mg/L降至0.5 mg/L,达到了《污水综合排放标准》（GB8978-1996）的二级排放标准。Aerobic/anoxic （A/O）process followed by flocculation -sedimentation was used to treat coking wastewater containing high - concentration of phenol and cyanide. The practical running data indicated that the DO in section A was less than 0. 3mg/L and the DO in section O was 3.5 mg/L when the HRT was 7 h. The phenol decreased to 1.0 mg/L from 288 - 680 mg/L, cyanide decreased to 0.5 mg/L from 0. 73 - 11.3 mg/L when dosage of PAC and PAM was 1012.3 mg/L and 4. 2 mg/L respectively,and flocculation- sedimentation time was 1.5 h. The effluent quality achieved the second class criteria specified in Integrated Wastewater Discharge Standard（ GB 8978 -1996）.

关 键 词：焦化废水 A/O 混凝 

分 类 号：X703.1[环境科学与工程—环境工程]