摘要
利用Fenton强化微电解工艺对煤层气井压裂废水展开预处理研究,以COD去除率和可生化性(B/C)为考察指标,单独工艺正交实验结果表明pH为3、反应时间为90 min、铁碳体积比为1.5∶1和pH为4、反应时间为80 min、H2O2投加量为4 mL/L分别是微电解与Fenton反应的最优条件,各可获得48.1%和44.9%的COD去除率。在最优条件下进行微电解-Fenton联合运行实验,连续61 h内COD去除率均稳定在65%以上,B/C由0.158上升到0.3以上,有利于后续生化处理的运行。
The wastewater from coalbed methane fracturing process was pretreated by the micro-electrolysis combined with Fenton reagent. Orthogonal test experiments were employed to investigate the influence factors of pretreatment on COD removal. The results indicate that when pH value of influent was 3,reaction time was 90 min and iron/charcoal volume ratio was 1. 5∶ 1 in micro-electrolysis,the COD removal reached 48. 1%,while in Fenton process,it reached 44. 9% at pH of 4. 0,reaction time of 80 min and H2O2 dosage of 4. 0 mL/L. Under the optimized conditions,micro-electrolysis-Fenton combined system obtained more than 65% of COD removal rate within 61 hours continuous operation,meanwhil,the BOD5/ COD increased from 0. 158 to over 0. 3,which is beneficial to biochemical treatment subsequently.
出处
《环境工程学报》
CAS
CSCD
北大核心
2014年第3期864-868,共5页
Chinese Journal of Environmental Engineering
基金
国家科技重大专项(2011ZX05060-005)
关键词
微电解
FENTON
煤层气
压裂废水
micro-electrolysis
Fenton reagent
coalbed methane
fracturing wastewater
