有机物捕集聚集介质制备条件的优化及效果评估  

Optimization of Preparation Conditions and Evaluation of Coarse Organic Flocculant for Capturing Organic Matter

作　　者：陈硕君 查晓 王灵芝 黄勇[1,2] CHEN Shuo-jun;ZHA Xiao;WANG Ling-zhi;HUANG Yong(School of Environmental Science and Engineering,Suzhou University of Science and Technology,Suzhou 215009,China;Institute of Environmental Biology and Technology,Suzhou University of Science and Technology,Suzhou 215009,China)

机构地区：[1]苏州科技大学环境科学与工程学院,江苏苏州215009 [2]苏州科技大学环境生物技术研究所,江苏苏州215009

出　　处：《中国给水排水》2024年第21期1-8,共8页China Water & Wastewater

基　　金：国家自然科学基金资助项目(51938010)。

摘　　要：城市污水资源化受到了广泛关注,其中有机物回收是重要一步。为此,提出了将污水污泥水热处理,利用水热液中的大分子物质作为原料制备聚集介质,用于捕集回收污水中有机物。但前期制备方法复杂,阻碍了聚集介质的推广应用,因此通过减少精制步骤、改性单体使用种类、氮气通入时间对其制备工艺进行改良,并对制备条件(pH、温度、时间、改性单体用量比例)进行优化。结果表明,采用湿法制备,在接枝共聚反应前30 min内通入氮气、pH为5、反应时间为2.5 h、温度为70℃、液相大分子物质与甲基丙烯酰氧乙基三甲基氯化铵(DMC)投配比为1∶0.7时,得到的聚集介质具有较优的絮凝性能及经济性;在投加量为30 mg/L的条件下,该聚集介质能够捕获污水中54%的COD,捕获效率提升64%。The resource utilization of municipal wastewater has been widely concerned,and the recovery of organic matter is an important step.It is proposed to treat sewage sludge with hydrothermal process,and use large molecular substances in hydrothermal solution as raw materials to prepare coarse organic flocculant(COF)for capturing and recovering organic matter in sewage.However,the prophase preparation complex hindered the application of COF.The preparation process was improved by reducing the refining steps,modifying the types of monomers used,and optimizing the nitrogen injection time;And the preparation conditions(pH,temperature,time,and the modified monomers ratio)was optimized.The results showed that the suitable preparation conditions were as follows:adding nitrogen within 30 min before the graft copolymerization reaction,pH=5,reaction time of 2.5 hours,temperature of 70℃,and the ratio of liquid macromolecular substances to methyl acryloxythyethyl trimethylammonium chloride(DMC)of 1∶0.7.The obtained COF had better flocculation performance and economy.When the dosage of COF was 30 mg/L,54%of the COD in the wastewater could be captured,and the capture efficiency was increased by 64%.

关 键 词：城市污水资源化 污泥水热处理 接枝共聚 聚集介质 

分 类 号：TU992[建筑科学—市政工程]