壳聚糖絮凝剂对焦化废水生化出水的COD去除研究  

Study of Chitosan Flocculant to the COD Removal of Coking Wastewater Effluent

作　　者：欧文波[1] 祝方[1] 万鹏[1] 史长苗[1] 

机构地区：[1]太原理工大学环境科学与工程学院,太原030024

出　　处：《科学技术与工程》2014年第21期167-172,共6页Science Technology and Engineering

基　　金：山西省基础研究计划项(2013011040-1;2008011020;2013021011-8);山西省教育厅高校科技开发项(20090012);太原理工大学校基金(2013T082;2012L030)资助

摘　　要：采用壳聚糖对经过A/O生物处理后的焦化废水进行深度处理,考察pH值和投药量对混凝作用的影响.焦化废水生化出水的CODCr为367 mg·L-1,浊度为44 NTU,色度为75.通过对不同pH值（4 ～10）的混凝实验可以看出,当pH值为6时相同投药量下焦化废水生化出水的色度、浊度以及CODCr去除率达到最佳.当絮凝剂的投药量达到10 mg·L-1时各项指标的去除率最高,其色度、浊度和CODCr去除率分别为66.67％、50％和68％.最终出水达到了国家排放标准.Chitosan was applied to the advanced treatment of the coking water which had been processed by the A/O biological technology. The impact of solution pH value and flocculant dosage on the coagulation was researched by author. The biochemical effluent water of coking water＇ s CODc,： value was 367 mg·L-1, turbidity was 44 NTU, chromaticity was 75. The coagulation experiments at different pH value（4 -10）showed that the chromaticity, turbidity and CODcr removal efficiency reached the best value when the pH was 7. The chromaticity, turbidity and CODcr removal efficiency were 66.67%, 50% and 68% ,respectively when the dosage of flocculant reached 10 mg·L-1. The final effluent reached the national emission standards.

关 键 词：焦化废水 壳聚糖 混凝 深度处理 

分 类 号：X705[环境科学与工程—环境工程]