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Brines from industrial water recycling: new ways to resource recovery
Journal of Water Reuse and Desalination ( IF 2.3 ) Pub Date : 2020-08-31 , DOI: 10.2166/wrd.2020.033
Malena Kieselbach 1 , Tobias Hogen 1 , Sven-Uwe Geißen 1 , Thomas Track 2 , Dennis Becker 2 , Hans-Jürgen Rapp 3 , Joachim Koschikowski 4 , Joachim Went 4 , Harald Horn 5 , Florencia Saravia 5 , Annika Bauer 5 , Rebecca Schwantes 6 , Daniel Pfeifle 6 , Nicolas Heyn 7 , Miriam Weissroth 8 , Bernd Fitzke 8
Affiliation  

Stricter environmental regulation policies and freshwater as an increasingly valuable resource are leading to global growth of zero liquid discharge (ZLD) processes in recent years. During this development, in addition to water, the recovery of recyclable materials, e.g. salts, from industrial wastewater and brines is considered more frequently. Within the framework of the HighCon research project, the subject of this study, a new ZLD process with the goal of pure single-salt recovery from industrial wastewater has been developed and investigated in a demonstrational setup at an industrial site. With regard to pure salts recovery, separating organic components is of great importance during the treatment of the concentrate arising from used water recycling. The removal of COD and of ions responsible for scaling worked very well using nanofiltration. The nanofiltration permeate containing the monovalent ions was pre-concentrated using electrodialysis and membrane distillation before selective crystallization for single-salt recovery was performed. An example economic case study for the newly developed ZLD process – based on demonstration results and considering optimization measures for a full-scale design – indicates that the costs are equal to those of a conventional ZLD process, which, however, does not provide inter alia the aforementioned benefit of single-salt recovery.

中文翻译:

工业水回收的卤水:资源回收的新方法

近年来,更严格的环境监管政策和淡水作为一种越来越有价值的资源正在导致全球零液体排放 (ZLD) 工艺的增长。在此开发过程中,除了水之外,更频繁地考虑从工业废水和盐水中回收可回收材料,例如盐。在本研究的主题 HighCon 研究项目的框架内,开发了一种新的 ZLD 工艺,目标是从工业废水中回收纯单盐,并在工业现场的示范设置中进行了研究。关于纯盐回收,在处理废水回收产生的浓缩物的过程中,分离有机成分非常重要。使用纳滤去除 COD 和负责结垢的离子效果很好。在进行单盐回收的选择性结晶之前,使用电渗析和膜蒸馏对含有一价离子的纳滤渗透物进行预浓缩。新开发的 ZLD 工艺的示例经济案例研究 - 基于示范结果并考虑全面设计的优化措施 - 表明成本与传统 ZLD 工艺的成本相同,但是,除其他外,它没有提供上述单盐回收的好处。
更新日期:2020-08-31
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