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KMID : 0613820230330010082
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Journal of Life Science
2023 Volume.33 No. 1 p.82 ~ p.90
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Disintegration of Waste Activated Sludge by Acid Hydrolysis
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Jaipakdee Patchareeya
Ahn Yeong-Hee
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Abstract
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Biological process is used worldwide to treat domestic and industrial wastewater. The process generally uses a mixed microbial culture of sludge. The growth of microorganisms in the sludge produces excess sludge from the wastewater treatment process. Some of the excess sludge is recycled as inoculum for wastewater treatment, but the rest is removed as waste from the process. As wastewater production is increasing worldwide every year, the number of wastewater treatment plants (WWTPs) is also in- creasing, resulting in the generation of large amount of waste sludge. The increasing amount of waste sludge from WWTPs has led to concerns about its management. Sludge disposal has been reported
to account for 50～60% of the total operating costs of a WWTP. Sludge disintegration is a new technology that can minimize volume of waste sludge and recover useful components (e.g., P, N, and soluble organic compounds) from it. Various methods of sludge disintegration have been developed based on physical, chemical, and biological treatments or combinations of these. In this review, we focus on sludge disintegration by acid hydrolysis, which is less studied among sludge disintegration methods. Such information can be useful in the development and implementation of a new technology for better sludge treatment.
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KEYWORD
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Acid hydrolysis, activated sludge, sludge disintegration, sludge treatment, waste activated sludge (WAS)
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FullTexts / Linksout information
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Listed journal information
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