摘要
净化水是经过一定预处理的石化废水,具有很高的回用价值,为此采用生化-Fenton联合工艺对净化水进行了处理,研究了初始pH、反应温度、H2O2与Fe2+的摩尔投加比、投加量和反应时间等因素对废水COD去除率的影响。结果表明,Fenton氧化反应可有效去除生化处理出水中的COD,在H2O2(30%)投加量为6.34 m L/L,H2O2与Fe2+的摩尔投加比为5∶1,pH值为4,温度30℃,反应时间2h条件下,废水COD的去除率可达79.7%。GC-MS分析结果表明,Fenton氧化反应对难降解有机污染物具有较好的去除效果,同时可有效提高废水的可生化性,B/C比最大可提升至0.58,氧化出水经生化处理后的剩余COD可降至77.9 mg/L,达到工业回用水标准。
Purified water,obtained from pretreatment of petrochemical wastewater,is of high value of reuse.In this study,purified water is treated by the combination process of biological-Fenton technology,and the effects of initial pH,reaction temperature,mole ratio of H2O2 to Fe2 ＋（ H2O2/ Fe2 ＋）,dosage quantity and reaction time on the COD removal rate were investigated. The results show that COD value of biochemical treated water can be reduced by Fenton oxidation effectively. Specifically,the COD removal efficiency could reach 79. 7%,when H2O2 quantity was 6. 34 ml / L,mole ratio of H2O2 to Fe2 ＋was 5,pH value was 4,temperature was 30℃ and operating time was 2 h. Confirmed by GC-MS analysis,Fenton oxidation can remove refractory organic compounds with efficiency,and meanwhile,increases B / C to 0. 58,improving biochemical degradability of the wastewater to a great extent. COD residual can be reduced to 77. 9 mg / L by the following biological treatment,which totally reaches the standard of industrial reused water.
出处
《环境工程学报》
CAS
CSCD
北大核心
2016年第1期217-222,共6页
Chinese Journal of Environmental Engineering
关键词
FENTON氧化
净化水
生化
purified water
biochemical process
Fenton oxidation
