聚氯乙烯离心母液的臭氧氧化法预处理研究  

Pre-treatment of Centrifugal Mother Liquid in Polyvinyl Chloride Production by Ozonation Technique

作　　者：葛睿[1] 闫征楚 曹珍[1] 朱磊[1] 花修艺[1] 孙文田[1] 郭志勇[1] 梁大鹏[1] 

机构地区：[1]吉林大学环境与资源学院地下水资源与环境教育部重点实验室,水资源与水环境吉林省重点实验室,吉林长春130012

出　　处：《环境科学与技术》2015年第11期194-199,共6页Environmental Science & Technology

基　　金：国家水体污染控制与治理科技重大专项课题(2012ZX07202-009);吉林省科技攻关计划重点项目(20140204035SF)

摘　　要：采用臭氧氧化技术对低浓度的聚氯乙烯(PVC)离心母液废水进行了预处理,分别考察了臭氧投加量、pH、初始温度及臭氧停留时间对废水中的水溶性高分子物质聚乙烯醇(PVA)及COD去除效率的影响,并在此基础上通过正交实验确定了废水中PVA和COD处理的最佳实验条件。研究结果表明,当反应时间为20 min,初始温度为30℃,臭氧发生器的脉冲密度为25%,pH值为7,通气流量为100 L/h时,COD和PVA的去除效率最高,分别为(72.6±2)%和(85.8±0.2)%,处理后的COD与PVA浓度分别为48.7和0.36 mg/L。此时的臭氧投加量为(4.2±0.2)g/L。废水的BOD5/COD值也从0.26提高到0.46,显著提高了废水的可生化性。此外,废水中的氨氮和浊度也得到了一定程度的去除,解决了离心母液废水后续深度处理——膜处理时存在的膜堵塞问题。Ozonation technique was employed in treatment of polyvinyl chloride（PVC） mother liquid from a chlor-alkali factory. Effects of ozone dosage, p H, initial temperature and ozone retention time on polyvinyl alcohol（PVA） and COD removal rate were studied in the bench-scale experiment. On that basis, the optimal treatment condition for PVA and COD removal was attained through orthogonal tests. The experiment suggested that the maximum removal of COD and PVA could be reached under the condition as reaction time 20 minutes, initial temperature 30 ℃, pulse density of the ozone generator25%, pH 7, and aeration rate 100 L/h. The removal rates of COD and PVA were（72.6 ±2）% and（85.8±0.2）%, respectively,and the residual concentrations of COD and PVA were 48.7 mg/L and 0.36 mg/L, respectively; meanwhile, ozone dosage was（4.2±0.2）g/L. In addition, it was found that biodegradability of the wastewater（BOD/COD） was upgraded from 0.26 to 0.46 with the removals of NH3-N and turbidity to some extent, which would facilitate the use of membrane technology following this pretreatment.

关 键 词：臭氧氧化技术 聚氯乙烯离心母液 影响因素 最佳处理条件 

分 类 号：X703[环境科学与工程—环境工程]