Sludge Solubilization and Reduction of Excess Sludge Production in Night Soil Treatment Plants using Chemical and Biological Treatments

A novel sludge solubilization process was applied to the reduction of excess sludge production in night soil treatment plants. Chemical and biological treatments were used to reduce excess sludge. In the first step, the sludge was pretreated with alkali to enhance biological reduction. In the second...

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Veröffentlicht in:Journal of the Japan Society of Material Cycles and Waste Management 2017, Vol.28, pp.1-12
Hauptverfasser: Yamaguchi, Toyoshi, Tomida, Yohei, Shirage, Hirokazu
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container_title Journal of the Japan Society of Material Cycles and Waste Management
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creator Yamaguchi, Toyoshi
Tomida, Yohei
Shirage, Hirokazu
description A novel sludge solubilization process was applied to the reduction of excess sludge production in night soil treatment plants. Chemical and biological treatments were used to reduce excess sludge. In the first step, the sludge was pretreated with alkali to enhance biological reduction. In the second step, the sludge was reduced by biological treatment. Many kinds of sludge degrading microorganisms were integrated into the sludge. The solubilization properties of batch treatment with alkali were evaluated in terms of the excess sludge in two night soil treatment plants. Successive treatments of alkali and biological solubilization were conducted. The excess sludge was solubilized approximately 30-50 % during the experimental period. This solubilization efficiency indicated that this process was able to reduce excess sludge production in night soil treatment plants.
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source J-STAGE Free; EZB-FREE-00999 freely available EZB journals
subjects chemical and biological treatment
night soil treatment
reduction of excess sludge production
sludge solubilization
title Sludge Solubilization and Reduction of Excess Sludge Production in Night Soil Treatment Plants using Chemical and Biological Treatments
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