内循环生物流化床工艺试验研究  

Experimental Study on Internal Loop Bio-fluidized Bed Technology

作　　者：邓德刚 秦丽姣 DENG De-gang;QIN Li-jiao(Sinopec(Dalian)Research Institute of Petroleum and Petrochemicals Co.,Ltd.,Dalian Liaoning 116045,China;National Engineering Research Center of Industrial Wastewater Detoxication and Resource Recovery,Dalian Liaoning 116045,China)

机构地区：[1]中石化(大连)石油化工研究院有限公司,辽宁大连116045 [2]工业废水无害化与资源化国家工程研究中心,辽宁大连116045

出　　处：《当代化工》2023年第5期1084-1087,1092,共5页Contemporary Chemical Industry

摘　　要：考察了不同生物载体的挂膜特性,研究了气量、水量和固含率对内循环生物流化床流态的影响,并详细考察了水力停留时间HRT、容积负荷和空气量对载体挂膜的影响,分析挂膜成功后对废水COD的去除效果。结果表明:最佳载体为粒径1~2 mm的生物陶粒;最佳固含率为5%。反应器快速挂膜启动的最佳条件为:HRT 0.5~1 h,污泥质量浓度1 g·L^(-1),固含率2%~4%,气量0.2~0.4 m^(3)·h^(-1),容积负荷4~5 kg(COD)·m^(-3)·d^(-1);反应器运行稳定后,废水COD去除率可达80%以上。The biofilm formation characteristics of different biological carriers were investigated,and the effect of gas flow,water flow and solid holdup on the flow pattern of internal circulating bifluidized bed was studied,and the effects of hydraulic residence time,volume load and air flow on the biofilm formation of carriers were investigated in detail,and the COD removal effect in wastewater after successful biofilm formation was analyzed.The results showed that the best carrier was bioceramics with diameter of 1~2 mm;The optimal solid holdup was 5%;The optimal conditions for the rapid start-up of the reactor were as follows:HRT 0.5~1 h,sludge mass concentration 1~2 g·L^(-1),solid holdup 2%~4%,gas flow 0.2~0.4 m^(3)·h^(-1),volume loading 4~5 kg(COD)·m^(-3)·d^(-1);After the reactor ran stablely,the COD removal rate of wastewater was more than 80%.

关 键 词：内循环生物流化床 载体挂膜 固含率 水力停留时间 COD去除率 

分 类 号：X703.1[环境科学与工程—环境工程]