Development and application of nanofiltration salt separation technology in zero discharge of wastewater
The study was made on the design and operation of the nanofiltration salt separation projects of coking wastewater of Tangshan Zhongrun Coal Chemical Co.,Ltd.and the mine water and coal chemical wastewater of Ningdong Mining Area.The results showed that the nanofiltration membrane element had high separation characteristics,and nanofiltration had negative retention characteristics for chloride ions,generally ranging from-9.5%to-40%.The retention rate for sulfate ions was 90%to 99%,and it also had different retention rates for other ions.The water recovery rate could reach more than 80%,and the nanofiltration salt separation process had a good application prospect in the field of zero discharge of wastewater.
nanofiltrationsalt separationzero discharge of wastewatersodium chloridesodium sulfatewater recoverymultistage circulation
万方数据
维普
