净水技术2023，Vol.42Issue(z2)：75-79,5.DOI:10.15890/j.cnki.jsjs.2023.s2.013
高碱度高盐工业废水资源化利用
Resource Utilization of High Alkalinity and High Salinity Wastewater
穆玉娟 1方小琴 1庞瑞华1
作者信息
- 1. 上海晶宇环境工程股份有限公司,上海 200439
- 折叠
摘要
Abstract
The process of pretreatment-RO concentration-resin adsorption-nanofiltration salt separation-evaporation is selected to treat high alkalinity and high salinity industrial wastewater.The results showed that the purity of Na2CO3 and NaCl products produced by freezing crystallization and evaporative crystallization was greater than 99％,meeting the first class standards for industrial dry salt in the Industrial Salt(GB/T 5462-2015)and the class Ⅱ first rate product for Sodium Carbonate for Industrial Use(GB/T 210-2022);The nanofiltration concentrated water generated by the nanofiltration salt separation step can replace the calcium and magnesium ions in the lime settling resin regeneration water.The calcium ions and magnesium ions in the resin regeneration water after precipitation with the nanofiltration concentrated water are all below 100 mg/L.This process can achieve the resource utilization of high alkalnity and high salinity industrial wastewater and nanofiltration concentrated water.The process retains the alkalinity of the water throughout the entire process without adding any chemicals,resulting in a small amount of sludge generated,which can effectively reduce operating costs and improve wastewater recovery rate.关键词
高盐废水/高碱度/纳滤/反渗透/蒸发结晶Key words
high salinity wastewater/high alkalinity/nanofiltration/reverse osmosis/evaporative crystallization分类
资源环境引用本文复制引用
穆玉娟,方小琴,庞瑞华..高碱度高盐工业废水资源化利用[J].净水技术,2023,42(z2):75-79,5.
