{"title":"Reverse osmosis water purification and brine valorization in a Tunisian hemodialysis center","authors":"Hajer Chaaben, H. Cherif, H. Elfil","doi":"10.1080/01496395.2023.2241115","DOIUrl":null,"url":null,"abstract":"ABSTRACT The technical–economic analysis of the hemodialysis water purification process, which uses reverse osmosis with sand, softeners, and granular-activated carbon as pretreatment steps, shows that the permeate conductivity exceeds 25 µS cm−1 at 25°C due to softeners failure and that the cost of cubic meter of water produced is 2.4 €. The purification unit generated brine with a conductivity above 5 mS.cm−1 and it is discharged into the sewer. Several brine valorizations are proposed; brine recycling and simulation with IMS design software reveal that it is possible to recycle 0.2 m3.h−1 of brine and achieve 83% conversion rate with a good quality of permeate. The residual of the first reverse osmosis brine is diluted by the second reverse osmosis permeate and is to be used for toilet flushing, landscape irrigation, and sterilization steam production.","PeriodicalId":21680,"journal":{"name":"Separation Science and Technology","volume":"4 1","pages":"2166 - 2177"},"PeriodicalIF":2.3000,"publicationDate":"2023-07-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Separation Science and Technology","FirstCategoryId":"5","ListUrlMain":"https://doi.org/10.1080/01496395.2023.2241115","RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"CHEMISTRY, MULTIDISCIPLINARY","Score":null,"Total":0}
引用次数: 0
Abstract
ABSTRACT The technical–economic analysis of the hemodialysis water purification process, which uses reverse osmosis with sand, softeners, and granular-activated carbon as pretreatment steps, shows that the permeate conductivity exceeds 25 µS cm−1 at 25°C due to softeners failure and that the cost of cubic meter of water produced is 2.4 €. The purification unit generated brine with a conductivity above 5 mS.cm−1 and it is discharged into the sewer. Several brine valorizations are proposed; brine recycling and simulation with IMS design software reveal that it is possible to recycle 0.2 m3.h−1 of brine and achieve 83% conversion rate with a good quality of permeate. The residual of the first reverse osmosis brine is diluted by the second reverse osmosis permeate and is to be used for toilet flushing, landscape irrigation, and sterilization steam production.
采用砂、软化剂和颗粒活性炭作为预处理步骤的反渗透血液透析水净化工艺的技术经济分析表明，由于软化剂失效，在25°C时渗透电导率超过25µS cm - 1，产生的立方米水成本为2.4欧元。净化装置产生的卤水电导率大于5ms。Cm−1，排入下水道。提出了几种卤水估值方法;利用IMS设计软件进行盐水回收模拟，结果表明，在渗透质量良好的情况下，回收0.2 m3.h−1的盐水可以达到83%的转化率。第一次反渗透盐水的残留物被第二次反渗透渗透物稀释，用于厕所冲洗、景观灌溉和消毒蒸汽生产。
期刊介绍：
This international journal deals with fundamental and applied aspects of separation processes related to a number of fields. A wide range of topics are covered in the journal including adsorption, membranes, extraction, distillation, absorption, centrifugation, crystallization, precipitation, reactive separations, hybrid processes, continuous separations, carbon capture, flocculation and magnetic separations. The journal focuses on state of the art preparative separations and theoretical contributions to the field of separation science. Applications include environmental, energy, water, and biotechnology. The journal does not publish analytical separation papers unless they contain new fundamental contributions to the field of separation science.
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