兼氧水解-加压接触氧化塔处理含盐吡虫啉废水  

Treatment of salty imidacloprid wastewater by facultative anaerobic hydrolysis-pressurized bio-contact oxidation process

作　　者：巩有奎[1] 李国新[2] 

机构地区：[1]石家庄铁路职业技术学院,河北石家庄050041 [2]中国科学院城市环境研究所,福建厦门361003

出　　处：《化学工程》2008年第11期55-58,共4页Chemical Engineering(China)

基　　金：2006年河北省教育厅自然科学指导基金资助项目(Z2006441)

摘　　要：对兼氧水解-加压接触生物氧化塔处理高含盐吡虫啉废水进行了试验研究。主要考察了兼氧水力停留时间、氧化塔压力、氧化塔容积负荷、农药废水含盐质量分数对系统运行效果的影响。结果表明:吡虫啉废水经水解预处理后,其COD从5 000 mg/L降至3 500 mg/L左右,可生化性明显提高,BOD5/COD由0.20升高到0.351;加压接触氧化塔在压力p为0.2—0.3 MPa,体积负荷Nv<18.2 kg/(m3.d)时,其COD去除率可达70%以上,其极限含盐质量分数可达2.8%;该组合工艺具有处理效果好、处理时间短、占地少、适用性强、耐盐性能好的特点,适用于处理高盐工业废水。The composed process of facuhative anaerobic hydrolysis acidification-pressurized bio-contact oxidation was applied to the treatment of high salinity imidaeloprid wastewater. The experimental research was condueted for the effect of retention time, pressure and organic loading rate of oxidation column and salinity on system operation. The results show that the pretreatment in facuhative anaerobic hydrolysis process reduces COD from 5 000 mg/L to 3 500 mg/L, and the biodegradability （BODs/COD） of wastewater increases from 0.20 to 0.351 by hydrolytic acidification; under the condition of volume load less than 18.2 kg/（ m^3·d） , pressure p = 0.2-0.3 MPa, COD removal effieieney can be over 70% and the process can run well when the mass concentration of salts is 2.8%. The combined process has the advantages of high treatment efficiency, less retention time, smaller space demand and good salt resistance. It is very suitable and compatible for the treatment of high salinity industry wastewater.

关 键 词：兼氧水解 加压接触氧化 容积负荷 吡虫啉废水 

分 类 号：X703[环境科学与工程—环境工程]