低COD浓度废水启动EGSB反应器  

The start-up of expanded granular sludge bed reactor with low strength COD

作　　者：白玉华[1] 张代钧[1] 祖波[1] 张萍[1] 汪林[1] 

机构地区：[1]重庆大学资源及环境科学学院环境科学系,重庆400030

出　　处：《环境工程学报》2007年第4期29-33,共5页Chinese Journal of Environmental Engineering

基　　金：国家自然科学基金资助项目(50378094);重庆大学研究生科技创新基金资助项目(200609Y1A0260185)

摘　　要：以厌氧活性污泥和好氧活性污泥接种于2个膨胀颗粒污泥床（EGSB）反应器中，进水流量为10mL／min，回流量为180mL／min，进水COD浓度在180mg／L左右，有机负荷率（OLR）为1．728kgCOD／m^3·d左右，污泥负荷率（SLR）为0．19kgCOD／kgMLSS·d左右，出水COD浓度维持在40mg／L左右，COD去除率达80％以上。控制温度在32～35℃，pH在6．8～7．2，反应器内氧化还原电位在-340mV以下，水力停留时间（HRT）4．2h，上升流速4．86m／h以及加入80mg／L絮凝剂（硫酸铝钾），缩短了启动时间，促进了颗粒污泥的形成。分别经过60d和120d运行，反应器启动成功。结果表明，上升流速、絮凝剂和污泥类型对颗粒污泥的形成有影响；接种好氧活性污泥在低浓度COD下，合理控制负荷速率能成功启动EGSB反应器。Granular sludge was formed in two expanded granular sludge bed（EGSB） reactors inoculated with aerobic activated sludge and anaerobic activated sludge after the start-up operation of 120 d and 60 d,respectively. Under the conditions that the flux was 10 mL/min and the circumfluence 180 mL/min,the COD removal efficiency could reach up 80% with influent COD concentration was 180 mg/L,the organic loading rate up to 1. 728 kg COD/m3 · d and the sludge loading rate about 0. 19 kg COD/kg MLSS · d. The temperature was controlled between 32 ℃ and 35 ℃ , pH at 6.8 - 7.2, redox potential below - 340 mV ; HRT was 4.2 h,the up- velocity was 4. 86 m/h and the flocculant（ aluminium potassium sulfate） was 80 mg/L, the formation of the granular sludge was accelerated. Results demonstrated that up-velocity,flocculant and the type of sludge affected the formation of granular sludge. The start-up of the reactor which was inoculated with aerobic sludge was succeeded if the loading rate was controlled rationally in low strength COD.

关 键 词：EGSB反应器 启动运行 颗粒污泥 低浓度COD 

分 类 号：X703[环境科学与工程—环境工程]