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Vol.1(1979) >

Please use this identifier to cite or link to this item: http://hdl.handle.net/10649/283

Title: 熱処理法による下水汚泥の処理に関する研究
Other Titles: Study on heat treatment of sewage sludge
Authors: 桃井, 清至
Authors Affiliation: 長岡技術科学大学建設工学系
Issue Date: 25-Mar-1980
Publisher: 長岡技術科学大学
Journal Title: 長岡技術科学大学研究報告
Volume: 1
Start page: 114
End page: 122
Abstract: It is generally acknowledged that heat treatment greatly improves the dewaterability of sewage sludge. The waterability rate increases markedly with treatment temperature up to 180\C\, and the moisture content decreases under 40%. But high-temperature treatment of sewage sludge solubilizes about half of the solid matter, and the process produces an odorous, coloured, polluting liquor. We made a study of aerobic heat treatment with partial oxidation. The purpose of the research was to improve the dewaterability of sewage sludge at low-temperature. The results were as follows: It is possible to improve dewaterbility of sewage with low-temperature aerobic heat treatment. But it is necessary to hold pressure above 15 kg/cm2. G in the reactors and to supply the amount of air, which the weight ratios of oxygen available in the air to CODcr of the sludge are 3.1\sim\10%.
language: ja
Contents Version: publisher
URI: http://hdl.handle.net/10649/283
ISSN: 0388-5631
Appears in Collections:Vol.1(1979)

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