基于纳滤处理工艺的水质化学稳定性研究  

Research on chemical stability of water based on nanofiltration treatment process

作　　者：沈雪 张健 林会杰 林勇 李国亮 王铮[1] 周文琪[1] SHEN Xue;ZHANG Jian;LIN Huijie;LIN Yong;LI Guoliang;WANG Zheng;ZHOU Wenqi(National Engineering Research Center of Urban Water Resources,Shanghai 200082,China;Yantai Jinzheng Emvironmental Technology Co.,Ltd.,Yantai 264003,China)

机构地区：[1]城市水资源开发利用(南方)国家工程研究中心,上海200082 [2]烟台金正环保科技有限公司,烟台264003

出　　处：《给水排水》2022年第9期13-19,共7页Water & Wastewater Engineering

基　　金：长江、黄河饮用水源高风险物质控制技术(2021YFC3200805)。

摘　　要：近年来频发的“黄水”问题,针对常规-纳滤给水处理工艺,研究并分析了不同工艺段水质指标浓度和化学稳定性变化情况。结果表明:以上海市某水库水为原水时,试验期间原水水质相对稳定,经常规工艺段处理后有机物指标浓度有所降低,而无机离子指标变化不大,经纳滤工艺处理后除氯化物外各项指标均有较高程度的去除;以不同稳定性指数进行分析时各工艺段水质化学稳定性有所不同,基于碳酸钙溶解平衡(I_(L)、I_(R)、AI),水质腐蚀性随处理工艺强化而加剧,纳滤出水显示有中等程度及以上的腐蚀性,基于其他水质参数(LR)时,原水LR值已经低于拉森和伊姆兰提出的可接受水平值,经常规工艺处理后水质腐蚀倾向加剧,经纳滤处理后水质腐蚀倾向略有缓解,但仍比原水水质腐蚀性严重。In view of the frequent “yellow water” problem in recent years, relying on the conventional-nanofiltration feedwater treatment process platform, the variation of water indexes concentration in different process sections was experimental studied, and the analysis of change in chemical stability was carried out. The results show that when the water from a reservoir in Shanghai is used as the raw water, the quality of the raw water is relatively stable during the test period. After the conventional process section, the concentration of organic matter indicators decreased, while the inorganic ion indicators did not change much. After the nanofiltration process, all indicators except chloride had a high degrees of removal efficiency. When analyzing with different stability discriminant indices, the chemical stability of water quality in each process section is different. Based on the calcium carbonate dissolution balance(I_(L), I_(R), AI), the corrosion of water quality intensified with the strengthening of the treatment process, and the nanofiltered water showed moderate and above corrosiveness. Based on other water quality parameters(LR), the LR value of the raw water was already lower than the acceptable level proposed by Larson and Imran. After conventional process treatment, the water quality corrosion tendency is intensified, and after the nanofiltration treatment, the water quality corrosion tendency is slightly relieved, but it is still more corrosive than the raw water.

关 键 词：常规-纳滤工艺 水质指标 化学稳定性 

分 类 号：TU991[建筑科学—市政工程]