Use of microwave pretreatment for enhanced anaerobiosis of secondary sludge
SCIE
SCOPUS
- Title
- Use of microwave pretreatment for enhanced anaerobiosis of secondary sludge
- Authors
- Park, B; Ahn, JH; Kim, J; Hwang, S
- Date Issued
- 2004-01
- Publisher
- I WA PUBLISHING
- Abstract
- This work elucidates the effects of pretreatment of secondary sludge by microwave irradiation on anaerobic digestion. The soluble chemical oxygen demand (COD) concentration increased up to 22% as microwave irradiation time increased, which indicated the sludge particles disintegrated. Three identical automated bioreactors with working volume of 5 1 were used as anaerobic digesters at mesophilic temperature (35degreesC). The reactors were separately fed with sludge with microwave pretreated- and control-sludge at different hydraulic retention times (HRT). The volatile solid (VS) reduction in the control operation was approximately 23.2 +/-1.3%, while it was 25.7 +/- 0.8% for the reactors with the pretreated sludge. The average biogas production rate with the pretreated sludge at 8, 10, 12, and 15 days HRTs was 240 11, 183 +/- 9, 147 +/- 8, and 117 +/- 7 ml/l/d respectively, while those with the control sludge were 134 +/- 12 and 94 +/- 7 ml/l/d at 10 and 15 days HRTs. Maximum rates of COD removal and methane production with the pretreated sludge were 64% and 79% higher than those of the control system, respectively.
- Keywords
- anaerobic digestion; microwave pretreatment; sludge disintegration; WASTE-ACTIVATED-SLUDGE; DIGESTION; DISINTEGRATION
- URI
- https://oasis.postech.ac.kr/handle/2014.oak/24878
- DOI
- 10.2166/wst.2004.0523
- ISSN
- 0273-1223
- Article Type
- Article
- Citation
- WATER SCIENCE AND TECHNOLOGY, vol. 50, no. 9, page. 17 - 23, 2004-01
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- There are no files associated with this item.
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