SBR生化-紫外芬顿法处理水性涂料生产废水研究

Study on Treatment of Wastewater from Waterborne Coating Production by SBR Biochemical−UV Fenton Process

采用SBR(序批式活性污泥法)生化-芬顿高级氧化工艺对混凝压滤后水性涂料生产废水进行了处理研究,重点考察了对水性涂料废水COD(化学需氧量)的去除效果。结果表明:水性涂料生产废水混凝压滤后采用SBR生物氧化可将废水COD从5000 mg/L降低至1000~1500 mg/L,随后采用芬顿高级氧化工艺可将COD进一步降低至500 mg/L以下,达到DB44/26—2001《广东省地方标准水污染物排放限值》三级排放标准。相对常规芬顿,紫外芬顿能大大缩短反应时间,提高反应效率。

Sequencing batch reactor(SBR)and Fenton advanced oxidation process were used to treat the waterborne coatings production wastewater after coagulation and pressure filtration,and the removal effect of chemical oxygen demand(COD) from wastewater was mainly studied. The results showed that the COD of the wastewater after coagulation and pressure filtration could be reduced from 5 000 mg/L to 1 000-1 500 mg/L,and the COD could be further reduced to less than 500 mg/L after the Fenton advanced oxidation process,reaching level Ⅲ of Guangdong local standard discharge limits of water pollutants(DB 44/26-2001).Compared with the traditional Fenton,UV Fenton could greatly shorten the reaction time and increase the reaction efficiency.