净水技术2025，Vol.44Issue(12)：67-74,8.DOI:10.15890/j.cnki.jsjs.2025.12.008
基于感官体验提升的地下水硬度调控技术
Groundwater Hardness Control Technology Based on Promotion of Sensory Experiences
WEN Ying 1MA Teng 1YANG Chuan 1QI Tiantian 1ZHANG Jing 1CAI Jianan 1CUI Jian1
作者信息
- 1. Beijing Waterworks Group Co.,Ltd.,Beijing 100012,China
- 折叠
摘要
Abstract
[Objective]This paper investigates groundwater hardness control technologies to address excessive scale and suspended scale formation after boiling tap water in groundwater supply areas.[Methods]Through the research on the raw water of S water treatment plant(WTP)in a northern city,it was found that although the groundwater was blended with surface water,there was still a large amount of scale,which affected the visual perception of water quality and the trust of users.Therefore,a variety of analysis method such as ion chromatography,X-ray diffraction,and scanning electron microscopy were adopted to analyze the composition and structure of the scale,and experiments on controlling the generation of scale,such as the water mixing method,pH adjustment method,and aeration stripping method were carried out.[Results]Compositions of the suspended scales and the precipitated scales were essentially identical,predominantly consisting of aragonite-type calcium carbonate.The particle size of the suspended scale was slightly smaller than that of the precipitated scale,and its shape was finer.The result of exploring the method for controlling scale indicate that the law of scale reduction was that the precipitated scale was reduced first,followed by the suspended scale.When water was added to make the total hardness lower than 179.6 mg/L,there was less precipitated scale and less suspended scale after boiling.When the water was diluted to make the total hardness lower than 70.8 mg/L,no obvious scale was generated.Meanwhile,adjusting the pH could change the existence form of carbonate to reduce scale formation.[Conclusion]For WTPs capable of water blending,the blending scheme can be adjusted according to the hardness of the treated water as a water quality index.For WTPs capable of pH adjustment,carbonic acid exists in the form of carbon dioxide in an acidic environment,and it is not easy for calcium carbonate to be produced.The combined use of aeration stripping and pH control can effectively reduce scale.WTPs can also promote the precipitation of calcium and magnesium ions by carbon dioxide aeration and adjusting the pH to alkaline,to achieve the purpose of reducing hardness at the user end.This paper provides a theoretical basis and practical reference for hardness control technologies in groundwater plants.关键词
地下水/沉淀水垢/悬浮水垢/碳酸钙/二氧化碳曝气/pH调节Key words
groundwater/precipitated scale/suspended scale/calcium carbonate/aeration with carbon dioxide/pH adjusting分类
建筑与水利引用本文复制引用
WEN Ying,MA Teng,YANG Chuan,QI Tiantian,ZHANG Jing,CAI Jianan,CUI Jian..基于感官体验提升的地下水硬度调控技术[J].净水技术,2025,44(12):67-74,8.
