摘要
为探究纳滤技术在工业高盐废水处理中的脱盐分质效果,在实验室搭建的纳滤装置上,采用纳滤膜VNF1-4040,研究了NaCl和Na_(2)SO_(4)混盐溶液的脱盐分质过程,考察了在不同质量浓度比混盐进料条件下膜通量、进料质量浓度、进料温度对纳滤脱盐效果的影响.研究结果表明,在所考察工况条件下,纳滤膜对Na2SO4始终有着良好的脱除效果,截留率保持在97.5%以上.对于质量比为1∶9 NaCl/Na_(2)SO_(4)混盐,其Na_(2)SO_(4)截留率均优于相同运行条件下的其它混盐溶液.膜通量越低,进料质量浓度和进料温度越高,NaCl截留率越低,脱盐效果越好.当膜通量、进料质量浓度和进料温度分别为26 LMH、2 g/L和10℃时,Na_(2)SO_(4)截留率最高,分别为98.41%、98.24%和98.80%.纳滤膜对混盐溶液中NaCl的分质效果较好,产水中NaCl的质量浓度占比保持在96%以上.
In order to explore the desalination and mass separation effect of nanofiltration technology in industrial high salt wastewater treatment,the nanofiltration membrane VNF1-4040 was used to study the desalination and separation process for NaCl and Na_(2)SO_(4) mixed salt solutions.The influence of membrane flux,feed concentration and feed temperature on the desalination effect of nanofiltration with different mass concentration ratios was investigated.The results show that the nanofiltration membrane always has the better removal effect on Na_(2)SO_(4) under the investigated conditions,and the rejection rate of Na_(2)SO_(4) is higher than 97.5%.When the mass ratio of NaCl/Na_(2)SO_(4) is 1∶9,it gets the best rejection rate of Na_(2)SO_(4) compared with other mass ratio in the same environmental conditions.Lower membrane flux,higher feed concentration and feed temperature can lead to the better NaCl rejection rate,which means better desalination effect.When the membrane flux,feed concentration and feed temperature are 26 LMH,2 g/L and 10℃,the rejection rate of Na_(2)SO_(4) reaches its peak being 98.41%,98.24%and 98.80%,respectively.In this experiment,nanofiltration membrane has a good separation effect on NaCl,and the proportion of NaCl concentration in the produced water remains above 96%.
作者
杜永亮
张光远
苑宏英
赵冲
DU Yongliang;ZHANG Guangyuan;YUAN Hongyinga;ZHAO Chong(School of Environmental and Municipal Engineering,TCU,Tianjin 300384,China;Tianjin Key Laboratory of Aquatic Science and Technology,TCU,Tianjin 300384,China;Joint Research Centre for Protective Infrastructure Technology and Environmental Green Bioprocess,TCU,Tianjin 300384,China)
出处
《天津城建大学学报》
CAS
2024年第1期40-44,共5页
Journal of Tianjin Chengjian University
基金
国家重点研发计划“政府间国际创新合作”专项项目(2019YFE0122400)
国家级大学生创新创业训练计划项目(202210792008)。
作者简介
杜永亮(1985-),男,山西吕梁人,天津城建大学讲师,博士;通讯作者:苑宏英(1974-),女,山西大同人,教授,博士,从事污水、污泥处理及资源化研究.E-mail:yuanhy_00@163.com。
