深床滤池对二沉池出水中典型重金属的去除效能  

Performance of Deep-Bed Filter for Typical Heavy Metal Removal in Effluent of Secondary Sedimentation Tank

作　　者：郑育林 周卫东 刘成[1] 周克梅 刘煜 李鹏程 ZHENG Yulin;ZHOU Weidong;LIU Cheng;ZHOU Kemei;LIU Yu;LI Pengcheng(Key Laboratory of Integrated Regulation and Resource Development Shallow Lakes Ministry of Education,Hohai University,Nanjing210098,China;Nanjing Water Group Co.,Ltd.,Nanjing210091,China;College of Urban Construction,Nanjing Tech University,Nanjing211816,China)

机构地区：[1]河海大学浅水湖泊综合治理与资源开发教育部重点实验室,江苏南京210098 [2]南京水务集团有限公司,江苏南京210091 [3]南京工业大学城市建设学院,江苏南京211816

出　　处：《净水技术》2022年第6期90-95,共6页Water Purification Technology

基　　金：江苏省太湖水污染防治办公室“城镇污水硝态氮深度处理新技术研究”(JSZC-G2013-191)。

摘　　要：为明确深床滤池对污水厂二沉池出水中典型重金属的去除效能,利用中试试验进行重金属(Pb、As、Cr、Hg)去除的研究。结果表明:深床反硝化滤池对重金属的去除效能与碳源投加直接相关。投加30 mg/L的乙酸钠可将Pb、As、Cr、Hg 4种重金属的去除率由不足5%升至20%左右,并可同时强化总氮(TN)的去除(由12 mg/L降至5 mg/L左右)。经机理分析,结果表明滤池内的生物量与重金属去除率之间具有较明显的相关关系,其中生物吸附作用是深床反硝化滤池去除重金属的主要途径。考虑到深床反硝化滤池对典型重金属离子的去除效能相对较低,需要与其他去除方法或工艺组合使用。In order to determine the performance of deep-bed filter for typical heavy metals removal in effluent of secondary sedimentation tank of wastewater treatment plant(WWTP),a study on the removal of heavy metals(lead,arsenic,chromium and mercury)was carried out by means of pilot test.Results showed that the removal performance of the deep-bed filter was related to the dosing of carbon source,the removal rates could increase from less than 5%to about 20%in the condition of sodium acetate(30 mg/L),TN removal was enhanced at the same time(from 12 mg/L to 5 mg/L).The analysis of mechanism suggested that there was an obvious correlation between the biomass in the filter and the removal rate of heavy metals,in which biological adsorption was the main way to remove heavy metals from the deep-bed denitrification filters.Considering that the removal efficiency of deep bed denitrification filter was relatively low for typical heavy metal ions,it needed to be combined with other removal methods or processes.

关 键 词：污水 深床反硝化滤池 深度处理 重金属 去除效能 

分 类 号：X703[环境科学与工程—环境工程]