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题名: Comprehensive utilization of phosphate in a highly concentrated recirculating cooling water system using secondary-treated municipal wastewater as make-up
作者: Wang, Dong; Wang, Jun; Luan, Zhao-kun; Wu, Ying; Li, He-sheng
刊名: DESALINATION AND WATER TREATMENT
出版日期: 2016-05-08
卷号: 57, 期号:22, 页码:10210-10221
关键词: Make-up ; Corrosion ; Comprehensive utilization ; Recirculating cooling water system (RCWS) ; Phosphate ; Secondary-treated municipal wastewater
DOI: 10.1080/19443994.2015.1037354
部门归属: 环境水质学国家重点实验室
英文摘要: A comprehensive utilization process using phosphate was developed for the reuse of high hardness secondary-treated municipal wastewater to a highly concentrated recirculating cooling water system (RCWS). It showed that the soluble phosphate in the wastewater could be directly reused as a corrosion inhibitor to prevent the RCWS from severe corrosion caused by the contaminants in the wastewater. Based on the synergetic corrosion inhibition of [GRAPHICS] and Zn2+, a chemical program was achieved for recirculating cooling water treatment. It contains 1-hydroxyethylidene-1,1-diphosphonic acid, polyepoxysuccinic acid, zinc sulfate heptahydrate, and a copolymer dispersant of LN-104B. In addition, LN-104B was verified to have excellent inhibition capability to calcium phosphate scale and zinc salts scale in the bench experiments. The pilot-scale experimental results showed that the simulated RCWS operated very well under the condition of high Ca2+ concentration (1,500mg/L as CaCO3) using the chemical program and automatic pH-controlled technique. The corrosion rate and the adhesion rate of the test tubes are only 0.023mm/a and 2.32mcm, respectively, which perfectly meet the requirements of the international standard of ISO 16784-2006. Not only can the process cut down the operating cost of RCWS, but also can reduce the environmental risk caused by excessive emission of phosphate. Moreover, large amounts of fresh water and phosphorus resources are expected to be conserved.
收录类别: SCI
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内容类型: 期刊论文
URI标识: http://ir.rcees.ac.cn/handle/311016/36023
Appears in Collections:环境水质学国家重点实验室_期刊论文

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