摘要
对Fenton氧化/混凝协同处理焦化废水生物出水的方法进行了研究,在综合考虑经济性和去除效果的前提下,提出了反应的最佳条件:H2O2投加量为220 mg/L,Fe2+投加量为180 mg/L,聚丙烯酰胺投加量为4.5 mg/L,反应时间为0.5h,pH=7.最终COD去除率可达44.5%,色度可以降为35倍,出水符合国家污水排放二级标准.同时,通过分析分子量分布和小分子有机物组成,揭示了Fenton氧化/混凝协同处理焦化废水生物出水的污染物变化规律.结果表明焦化废水经过Fenton氧化/混凝协同处理后,其出水可达到国家二级排放标准,并且处理成本相对较低,具有实际应用的前景.
The method of Fenton oxidation cooperated with coagulation for biologically treated coking wastewater was conducted. Based on both of the removal performance and the operating costs, optimal reaction condition was proposed. Operating at H202 concentration 220 rag/L, Fe^2+ concentration 180 rag/L, PAM concentration 4.5 rag/L, reaction time 0.5h and pH = 7, about 44.5 % of COD was removed and chroma reached 35. In addition, through analyzing of the changes of molecular weight distribution and constitute of organic compounds in effluent, the pollutant transformation rule was put forward. The result shows that the effluent treated by Fenton oxidation cooperated with coagulation can reach the wastewater secondary discharge standard, and the operation costs are acceptable. This implies that the technique of Fenton oxidation cooperated with coagulation has promising in practice.
出处
《环境科学》
EI
CAS
CSCD
北大核心
2006年第11期2201-2205,共5页
Environmental Science
基金
国家高技术研究发展计划(863)项目(2002AA601250)
关键词
焦化废水
Fenton氧化/混凝协同
分子量分布
全分析
coking wastewater
Fenton oxidation cooperated with coagulation
distribution of molecular weight
analyzing of organic compounds constitute