混凝吸附及化学氧化深度处理焦化废水  

Advanced treatment of coking wastewater by coagulation-adsorption and oxidation

作　　者：潘大伟[1] 刘辉[1] 单明军[1] 费卓越[1] 杨鹏[1] 

机构地区：[1]辽宁科技大学化学工程学院,鞍山114051

出　　处：《环境工程学报》2012年第12期4543-4547,共5页Chinese Journal of Environmental Engineering

基　　金：辽宁省教育厅高等学校科学研究计划项目(20060436)

摘　　要：以蒙脱石、凹凸棒石、次氯酸钙和PAC、PAM为基本材料,对焦化废水二级生化出水进行深度处理。实验结果表明:蒙脱石与凹凸棒石以4∶1的比例配合使用,可明显提高焦化废水中COD和色度去除率;采用次氯酸钙作为氧化剂,可进一步提高焦化废水的脱色率和COD去除率,处理间差异达到极显著和显著水平;去除COD的最优实验条件为:粘土矿物(蒙脱石∶和凹凸棒石=4∶1)添加量4.0 g/L、氧化剂(次氯酸钙)添加量1.0 g/L、絮凝剂(聚合氯化铝:聚丙烯酰胺=15/1)添加量0.15 g/L,处理后色度去除率达到97.0%,COD去除率达到69.1%;脱色的最优实验条件为:粘土矿物添加量4.0 g/L、氧化剂添加量1.0 g/L、絮凝剂添加量0.2 g/L,处理后色度去除率达到98.5%,COD去除率达到66.4%。Montmorillonite, attapulgite clay, calcium hypochlorite, polyaluminium chloride and polyacryl- amide were selected as experimental materials for the advanced treatment of coking wastewater. Results show that： the combined use of montmorillonite and attapulgite clay at the ratio 4：1 could obviously improve the re- moval of COD and color of coking wastewater. The addition of calcium hypochlorite as oxidant can further im- prove removal of COD and color of coking wastewater and the difference reached very significant level and signifi- cant level, respectively. The optimum conditions for the removal of COD were montmorillonite and palygorskite clay of 4.0 g/L with a ratio of 4： 1, calcium hypochlorite of 1.0 g/L, polyaluminium chloride and polyacrylam- ide of 0.15 g/L with a ratio of 15：1 , and the removal rate of COD and color reached 97.0% and 69.1% , respectively. The optimum conditions for the removal of color were montmorillonite and palygorskite clay of 4.67 g/ L with a ratio of 4： 1, calcium hypochlorite of 1.0 g/L, polyaluminium chloride and polyacrylamide of 0.20 g/L with a ratio of 15： 1, and the removal rate of COD and color reached 97.6% and 66.1% , respectively.

关 键 词：蒙脱石 凹凸棒石 次氯酸钙 焦化废水 深度处理 

分 类 号：X703[环境科学与工程—环境工程]