Enhancement of cryptosporidium oocyst removal by coagulation and sedimentation with poly-silicate iron (PSI)
Journal of Chemical Engineering of Japan 39 巻 2 号
137-143 頁
2006 発行
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全文
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タイトル ( eng ) |
Enhancement of cryptosporidium oocyst removal by coagulation and sedimentation with poly-silicate iron (PSI)
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作成者 |
Deevanhxay Phengxay
Hasegawa Takako
Okada Mitsumasa
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収録物名 |
Journal of Chemical Engineering of Japan
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巻 | 39 |
号 | 2 |
開始ページ | 137 |
終了ページ | 143 |
抄録 |
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.
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著者キーワード |
Coagulant
Crypto-Tracer
Flocculation Performance
Sedimentation
Synthetic Cryptosporidium Oocyst
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NDC分類 |
化学工業 [ 570 ]
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言語 |
英語
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資源タイプ | 学術雑誌論文 |
出版者 |
The society of chemical engineers, Japan
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発行日 | 2006 |
権利情報 |
Copyright (c) 2006 The society of chemical engineers, Japan
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出版タイプ | Author’s Original(十分な品質であるとして、著者から正式な査読に提出される版) |
アクセス権 | オープンアクセス |
収録物識別子 |
[NCID] AA00709658
[ISSN] 0021-9592
[DOI] 10.1252/jcej.39.137
[DOI] http://dx.doi.org//10.1252/jcej.39.137
~の異版である
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