論文

査読有り
2019年12月1日

Improving chemical cleaning of fouled membranes in a drinking water treatment plant

Water Science and Technology: Water Supply
  • Susumu Hasegawa
  • ,
  • Ryosuke Takagi
  • ,
  • Hideto Matsuyama
  • ,
  • Yasuhiro Tanaka
  • ,
  • Naokazu Wake

19
8
開始ページ
2330
終了ページ
2337
記述言語
掲載種別
研究論文(学術雑誌)
DOI
10.2166/ws.2019.114

© IWA Publishing 2019 Recently, membrane filtration systems have become increasingly common in drinking water treatment plants. In this industry, preventing membrane fouling is of utmost importance. Many studies on the relationship between raw water components and membrane fouling have been performed in laboratory conditions. However, very few studies have analyzed the components of foulants on the fouled membrane as operated in actual drinking water treatment plants. By analyzing these components in plant-conditions, membrane fouling will be more effectively prevented. In this study, we analyzed the components of foulants extracted with 0.1 N NaOH from a fouled membrane operated in a drinking water treatment plant in Japan. Our analysis revealed that the main foulants were humic substances. In order to dissolve the accumulated humic substances, additional chemical cleaning was attempted with 500 ppm sodium hypochlorite. As a result, it was found that humic substances were dissolved and filtration resistance significantly decreased. Additionally, the removal of inorganic foulants was also greater after chemical cleaning with 500 ppm sodium hypochlorite, as inorganic foulants trapped within humic substances were released to the membrane surface as hydroxides by the additional sodium hypochlorite cleaning and were dissolved by the periodic citric acid cleaning.

リンク情報
DOI
https://doi.org/10.2166/ws.2019.114
Scopus
https://www.scopus.com/record/display.uri?eid=2-s2.0-85076599055&origin=inward
Scopus
https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85076599055&origin=inward
Scopus Citedby
https://www.scopus.com/inward/citedby.uri?partnerID=HzOxMe3b&scp=85076599055&origin=inward
URL
http://orcid.org/0000-0003-2468-4905

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