超滤-纳滤双膜工艺处理乌龙江段周期性咸潮水中试  

Pilot Study on Double Membrane Process in Water Polluted by Periodic Salt Tides in WulongRiverSection

作　　者：陈寿彬 CHEN Shou-bin(Fuzhou City Construction Design&Research Institute Co.Ltd.,Fuzhou 350000,China)

机构地区：[1]福州城建设计研究院有限公司,福建福州350000

出　　处：《中国给水排水》2024年第11期24-30,共7页China Water & Wastewater

摘　　要：针对乌龙江段受海水倒灌影响出现的周期性咸潮污染现象,通过中试考察了超滤-纳滤双膜工艺在该种水质下的运行适应性以及膜污染情况。结果表明,双膜工艺在周期性咸潮污染水质情况下具有较好的污染物去除能力,保障出水安全的能力较强。在原水浊度为310 NTU、电导率为5 960μS/cm、Cl^(-)浓度为1 987 mg/L和SO_(4)^(2-)浓度为327 mg/L时,出水各常规水质指标仍能稳定达标,出水浊度保持在0.1 NTU以下,电导率、Cl^(-)和SO_(4)^(2-)去除率分别达到98.96%、99.32%和99.89%,且在长期运行过程中较为稳定。对其他离子指标如Fe^(2+)、Mn^(2+)和F-也均能实现较好的去除,平均去除率分别达到97.55%、99.60%和97.68%,且出水中各项微生物指标也均未检出。超滤工艺的膜污染以滤饼层污染为主,污染物质堆积在膜表面形成滤饼,并堵塞一部分膜孔。Aiming at the phenomenon of periodic salt tide pollution in the Wulong River section under the influence of seawater backflow,the pilot study was conducted to investigate the practical operation adaptability of the double membrane process under the condition of periodic salt tide pollution,and to explore the actual membrane fouling situation.The results showed that the double membrane process had a strong ability to remove pollutants and ensure the safety of effluent when the water was polluted by periodic salt tides.When the raw water quality reached the maximum turbidity of 310 NTU the conductivity of 5960μS/cm,the Cl^(-)concentration of 1987 mg/L,and SO_(4)^(2-)concentration of 327 mg/L,the conventional water quality indexes still reached the standard,and the turbidity of the effluent remained below 0.1 NTU.The removal rate of conductivity reached 98.96%,and the removal rate of Cl and SO_(4)^(2-)could reach 99.32%and 99.89%respectively,which were relatively stable in the long-term operation process.Other ion indexes like Fe^(2+),Mn^(2+)and Fcould be effectively removed,with the average removal rates reaching 97.55%,99.60%and 97.68%,respectively.All microbial indexes were not detected in effluent.The membrane fouling was mainly caused by cake layer fouling.The polluted substances accumulated on the membrane surface to form filter cake and block part of membrane holes.

关 键 词：周期性咸潮污染 双膜工艺 处理效果 膜污染 

分 类 号：TU991[建筑科学—市政工程]