Research on the proper calcium concentration for shipboard seawater reverse osmosis remineralization
10.3760/cma.j.issn.1009-6906.2017.02.013
- VernacularTitle:船舶反渗透海水淡化水矿化钙适宜浓度分析
- Author:
Shiyang ZHOU
1
;
Jianping ZHANG
;
Zhigang FANG
;
Yueping YANG
;
Junrong WU
;
Bingquan DING
;
Fumin HUANG
Author Information
1. 海军医学研究所, 上海,200433
- Publication Type:Journal Article
- Keywords:
Ship;
Seawater reverse osmosis;
Calcium;
Remineralization;
Proper concentration
- From:
Chinese journal of nautical medicine and hyperbaric medicine
2017;24(2):135-137,143
- CountryChina
- Language:Chinese
-
Abstract:
Objective To research and propose the proper calcium concentration for shipboard seawater reverse osmosis remineralization.Methods Comprehensive analyses were made on the calcium nutrient intake of adults,the effects of [Ca2+] level on the desalination corrosion index,the methods of shipboard seawater reverse osmosis remineralization and related remineralization criteria.Then,the range of proper calcium concentration of soft water remineralization was recommended for shipboard seawater reverse osmosis remineralization from different angels,which was verified by municipal drinking water quality survey results.Results Food was the main source of human calcium intake.[Ca2 +] concentration elevation could significantly reduce the corrosiveness of desalinated water,however,the contribution ratio for Langelier index (LSI) was debased when [Ca2+] reached 41 mg/L.Shipboard desalination remineralization was more preferable with direct added agential.At present,for the sake of health,the minimum quality criteria for [Ca2+] in soft water was 16 mg/L.Calcium chloride was commonly used for desalinated water remineralization,with the maximum permitted concentration being 36 mg/L.Conclusions In consideration of the shipboard environment and support capability comprehensively,the applicable calcium concentration of shipboard RO desalination remineralization was 16-36 mg/L,which was within the range of drinking water calcium concentration for 57％ of the cities of our countries.
