Variations in methanogenic population structure under overloading of pre-acidified high-strength organic wastewaters
SCIE
SCOPUS
- Title
- Variations in methanogenic population structure under overloading of pre-acidified high-strength organic wastewaters
- Authors
- Shin, SG; Zhou, BW; Lee, S; Kim, W; Hwang, S
- Date Issued
- 2011-04
- Publisher
- ELSEVIER SCI LTD
- Abstract
- Methanogenic populations were quantitatively investigated in two separate anaerobic reactors, which received effluents from acidogenesis of either food waste-recycling wastewater or swine wastewater. Each set of the anaerobic digesters was operated under high organic loading rate (OLR) conditions (8.3-39.8 g chemical oxygen demand (COD)/L/d) with four different hydraulic retention times (10.4-3.0 days). Real-time PCR analysis demonstrated that the order Methanosarcinales was the most abundant (> 55%) methanogenic group in the six runs with > 50% COD removal, while the dominance (> 70%) of Methanobacteriales was observed in the other two runs (< 20% COO removal). Methanomicrobiales constituted a minor (< 30%) population in all eight runs. The two reactor; with relatively low performance were the only trials which contained less than 5 x 10(7) copies/mL of 16S rRNA gene of Methanosarcinales. These results imply that a minimum level of Methanosarcinales is important for achieving even moderate levels of process efficiency under high OLR. (C) 2011 Elsevier Ltd. All rights reserved.
- Keywords
- Anaerobic digestion; Food waste-recycling wastewater; Methanobacteriales; Methanosarcinales; Real-time PCR; Swine wastewater; WASTE-WATER TREATMENT; ANAEROBIC-DIGESTION; FOOD WASTE; COMMUNITY; TECHNOLOGY; DYNAMICS
- URI
- https://oasis.postech.ac.kr/handle/2014.oak/17457
- DOI
- 10.1016/J.PROCBIO.2011.01.009
- ISSN
- 1359-5113
- Article Type
- Article
- Citation
- PROCESS BIOCHEMISTRY, vol. 46, no. 4, page. 1035 - 1038, 2011-04
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