Comparison of Methods for the Extraction of Bioflocculants from Activated Sludge
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概要
- 論文の詳細を見る
The present study aimed to develop an effective extraction method for bioflocculants from activated sludge. Microbial polymers obtained from activated sludge by four different extraction methods (steaming, NaOH, SDS and washing extractions) were compared in terms of yield, chemical components, and flocculating activity for kaolin clay suspension. NaOH extraction has the highest yield, while washing extraction resulted to the lowest. The main component of the polymers obtained was protein, involving saccharide and nucleic acid, although the contents were varied considerably for individual polymers. All polymers possessed flocculating activity for kaolin clay containing cations, although the degree of activity varied significantly with extraction method. The activity of the polymer extracted with NaOH was the highest, while the activity of the polymer extracted with washing was the lowest. Among the cations tested, calcium and magnesium ions promoted activity. These results indicate that NaOH extraction was the most effective method for the extraction of bioflocculants from activated sludge.
- Japan Society on Water Environmentの論文
著者
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Kushi Yasunori
Department Of Biochemistry Faculty Of Medicine Tokyo Medical And Dental University
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NAKANO Masuo
Faculty of Dairy Science, Rakuno Gakuen University
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Tsuge Junichi
Sapporo Otani Junior College
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KUSHI Yasunori
Department of Agricultural and Life Science, Obihiro University of Agriculture and Veterinary Medicine
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