LIQiang,HANYu,MUHai-jun,et al.Design of a Large-scale Advanced Treatment Project for Reclaimed Water[J].China Water & Wastewater,2024,40(18):59-63.
Design of a Large-scale Advanced Treatment Project for Reclaimed Water
China Water & Wastewater[ISSN:1000-4062/CN:12-1073/TU]
volume:
第40卷
Number:
第18期
Page:
59-63
Column:
Date of publication:
2024-09-17
- Keywords:
- reclaimed water advanced treatment; double membrane process; salt separation by nanofiltration; DTRO; freezing crystallization; lime softening
- Abstract:
- With the rapid development of economy, the groundwater in Tongliao has been seriously over-exploited, and there is an urgent need to use reclaimed water to replace industrial groundwater sources to alleviate the problems caused by water shortage and groundwater over-exploitation. The design scale of the reclaimed water advanced treatment project is 10×104 m3/d. It adopts a quality-separated water supply plan and will be implemented in two phases. The first phase provides production water to coal chemical companies, using a double-membrane method + special membrane concentration process（DTRO, high-pressure RO）to ensure that the effluent quality reaches the standard while increasing the system water production rate to more than 95%. Using nanofiltration salt separation, MVR and freeze crystallization technology, the solid waste can be reduced and recycled, and high-quality industrial-grade sodium chloride and sodium sulfate can be produced, and the yield of miscellaneous salt can be reduced by 95%. In the second phase, circulating cooling water is provided for the power plant, and lime clarification and filtration + advanced oxidation emergency treatment process are adopted to reduce treatment costs while ensuring water quality standards, and increase users’ enthusiasm for reclaimed water.
Last Update:
2024-09-17