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Variations in methanogenic population structure under overloading of pre-acidified high-strength organic wastewaters

Paper ID Volume ID Publish Year Pages File Format Full-Text
34894 45056 2011 4 PDF Available
Title
Variations in methanogenic population structure under overloading of pre-acidified high-strength organic wastewaters
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% COD removal). Methanomicrobiales constituted a minor (<30%) population in all eight runs. The two reactors with relatively low performance were the only trials which contained less than 5 × 107 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.

Keywords
Anaerobic digestion; Food waste-recycling wastewater; Methanobacteriales; Methanosarcinales; Real-time PCR; Swine wastewater
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Variations in methanogenic population structure under overloading of pre-acidified high-strength organic wastewaters
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Publisher
Database: Elsevier - ScienceDirect
Journal: Process Biochemistry - Volume 46, Issue 4, April 2011, Pages 1035–1038
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us