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ID 24974
本文ファイル
著者
Deevanhxay, Phengxay
Hasegawa, Takako
Okada, Mitsumasa
キーワード
Coagulant
Crypto-Tracer
Flocculation Performance
Sedimentation
Synthetic Cryptosporidium Oocyst
NDC
化学工業
抄録(英)
The improvement of Cryptosporidium oocysts removals is an urgent need in drinking water treatment and one of the possible solutions is to use high-performance coagulant such as poly-silicate iron coagulant (PSI) instead of conventional coagulants like poly aluminum chloride (PAC). The efficiency of synthetic Cryptosporidium oocysts (S-Crypto) removal using PSI was evaluated by both jar tests and pilot plant experiments. The residual concentration of S-Crypto could be reduced even though the coagulation was operated under the optimum conditions for turbidity removal. The removal efficiencies of S-Crypto using PSI were up to 42-1073766880gher than those using PAC in the pilot plant. The higher performance of PSI is brought about by the presence of ferric species in the coagulant which promotes better sedimentation and not by the higher flocculation performance of the coagulant. In addition, the performance of PSI was independent of temperature, and S-Crypto removal by ferric chloride (FC) was not stable in cold raw water. It was suspected that the bound polymerized silica of PSI increases the stability of coagulation in cold water.
掲載誌名
Journal of Chemical Engineering of Japan
39巻
2号
開始ページ
137
終了ページ
143
出版年月日
2006
出版者
The society of chemical engineers, Japan
ISSN
0021-9592
NCID
出版者DOI
言語
英語
NII資源タイプ
学術雑誌論文
広大資料タイプ
学術雑誌論文
DCMIタイプ
text
フォーマット
application/pdf
著者版フラグ
author
権利情報
Copyright (c) 2006 The society of chemical engineers, Japan
関連情報URL(IsVersionOf)
http://dx.doi.org//10.1252/jcej.39.137
部局名
環境安全センター
工学研究科