纳滤膜去除水中有机物及提高产水率的生产性试验  

Productive Test on Nanofiltration Membrane to Remove Organic Matter from Water and Improve Water Production Rate

作　　者：颉亚玮 徐振峰 裘嘉琪 张刚 刘宏远[1] 孙海平 朱海涛 XIE Ya-wei;XU Zhen-feng;QIU Jia-qi;ZHANG Gang;LIU Hong-yuan;SUN Hai-ping;ZHU Hai-tao(College of Civil Engineering,Zhejiang University of Technology,Hangzhou 310014,China;Zhejiang Urban and Rural Planning Design Institute,Hangzhou 310030,China;Ningbo Urban Construction Design and Research Institute Co.Ltd.,Ningbo 315000,China;Jiaxing Water Investment Group Co.Ltd.,Jiaxing 314000,China)

机构地区：[1]浙江工业大学土木工程学院,浙江杭州310014 [2]浙江省城乡规划设计研究院,浙江杭州310030 [3]宁波市城建设计研究院有限公司,浙江宁波315000 [4]嘉兴市水务集团有限公司,浙江嘉兴314000

出　　处：《中国给水排水》2023年第7期29-34,共6页China Water & Wastewater

基　　金：国家水体污染控制与治理科技重大专项(2017ZX07201004)。

摘　　要：为解决浙江省某水厂现有混凝沉淀—臭氧/活性炭工艺无法进一步去除水中有机物的问题,开展了处理规模为12 m^(3)/h的纳滤系统(三段式纳滤膜单元)以及反渗透单元处理纳滤系统浓水的生产性试验,研究了4种型号纳滤膜(A、B、C、D)的产水水质以及反渗透提高系统产水率的效果。结果表明,纳滤单元在回收率为90%的条件下,对原水中COD_(Mn)、TOC和UV_(254)的去除率均在78%以上,产水COD_(Mn)、TOC和UV_(254)分别在0.45 mg/L、0.50 mg/L和0.004 cm-1以下;系统出水经消毒后未检出《生活饮用水卫生标准》(GB 5749—2022)规定的16种消毒副产物,对三卤甲烷生成势和卤乙酸生成势的去除率在89%以上。纳滤膜还能去除水中TDS和总硬度,改善口感。反渗透单元可将纳滤系统产水率提高至97.5%。纳滤系统及反渗透单元的总运行成本估算为1.28元/m3,但浓水如何无害化处置是今后在纳滤工程中还需考虑的问题。In order to solve the problem that the existing coagulation precipitation and ozonation/activated carbon process in a water treatment plant in Zhejiang Province could not further remove organic matter in the water,a productive experiment was carried out on nanofiltration system with the treatment scale of 12 m^(3)/h(three-stage nanofiltration membrane unit)and reverse osmosis unit was used to treat the concentrated water of nanofiltration system.The treated water quality of four types of nanofiltration membranes(A,B,C and D)and the effect of improving the water yield of the system by reverse osmosis were studied.The results showed that the removal rates of COD_(Mn),TOC and UV_(254)in raw water were above 78% at the recovery rate of 90%,and the COD_(Mn),TOC and UV_(254)in produced water were below 0.45 mg/L,0.50 mg/L and 0.004 cm^(-1),respectively.After disinfection,16 kinds of disinfection by-products were not detected in the water according to the Standards for Drinking Water Quality(GB 5749-2022),and the removal rate of the trihalomethane formation potential and haloacetic acid formation potential was over 89%.Nanofiltration membrane could also remove TDS and total hardness from water to improve taste.The reverse osmosis unit could increase the water yield of nanofiltration system to 97.5%.The total operation cost of nanofiltration system and reverse osmosis unit was estimated to be 1.28 yuan/m^(3),but how to dispose concentrated water is still a problem to be considered in the future.

关 键 词：纳滤 有机物 纳滤浓水 反渗透 消毒副产物 

分 类 号：TU991[建筑科学—市政工程]