Feasibility of Recycling Residual Solid from Hydrothermal Treatment of Excess Sludge KCI

Title
Feasibility of Recycling Residual Solid from Hydrothermal Treatment of Excess Sludge
Alternative Title
Feasibility of Recycling Residual Solid from Hydrothermal Treatment of Excess Sludge
Author(s)
김경련; Koichi Fujie; Toshiharu Fujisawa
KIOST Author(s)
Kim, Kyoungrean(김경련)
Publication Year
2008-09
Abstract
Residual solid in excess sludge treated by hydrothermal reaction was investigated as raw material for its recycling. Treated excess sludge and residual solid were also focused on their content change during hydrothermal reaction. Two kinds of excess sludge, obtained from a local food factory and a municipal wastewater treatment process, were tested under various conditions. Following hydrothermal reaction, depending on the reaction conditions, biodegradable substrates in treated excess sludge appeared to increase. The separated residual solid was a composite composed of organic and inorganic materials. The proportion of carbon varied from 34.0 to 41.6% depending on reaction conditions. Although 1.89% of hazardous materials were detected, SiO₂ (Quartz) was a predominant constituent of the residual solid. X-ray diffraction (XRD) experiments revealed that the residual solid was of a partially amorphous state, suggesting that the residual solids could be easily converted to stable and non harmful substances through a stabilization process. Thus, this technology could be successfully used to control excess sludge and its reuse.
ISSN
1226-1025
URI
https://sciwatch.kiost.ac.kr/handle/2020.kiost/4453
Bibliographic Citation
Environmental Engineering Research, v.13, no.3, pp.112 - 118, 2008
Publisher
대한환경공학회
Keywords
Biodegradability improvement; Excess sludge; Hydrothermal reaction; Residual solid; Resource recovery
Type
Article
Language
English
Publisher
대한환경공학회
Related Researcher
Research Interests

Remediation of marine sediments,Development of remediation technologies,Coastal marine environment,해양퇴적물 정화,정화 기술 개발,연안 환경

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