fulltext.study @t Gmail

Effect of different acetate:propionate ratios on the methanogenic community during thermophilic anaerobic digestion in batch experiments

Paper ID Volume ID Publish Year Pages File Format Full-Text
3004 147 2014 8 PDF Available
Title
Effect of different acetate:propionate ratios on the methanogenic community during thermophilic anaerobic digestion in batch experiments
Abstract

•Investigation of different acetate:propionate ratios for AD (75 days).•Acetate:propionate ratio of 2 resulted in highest methane production.•Differences between ratios ≤ 1 and ≥ 2 on metabolic level.•Metabolic changes hardly reflected in DNA level investigations.

The present study investigated the metabolism of different acetate:propionate ratios (0.25, 0.33, 0.5, 1.0, 2.0, 3.0, 4.0) in equimolar carbon concentration during an anaerobic decomposition process under defined laboratory conditions and evaluated the engaged methanogenic community. Significant differences on a metabolic level (gas production, gas composition, volatile fatty acid (VFA) concentration) were observed between acetate:propionate ratios ≤1 and ≥2. Generally ratios ≥2 resulted in a faster methane production and VFA decomposition compared to ratios ≤1. Regarding the composition of the methanogenic community as well as the abundance of Methanosarcinales these differences were not reflected in an appropriate manner when DNA based methods (dHPLC and qPCR) were applied. However, by a culture based approach these differences could be documented showing a significant difference in the number of cultivable methanogens between initial acetate:propionate ratios ≤1 and ≥2.

Keywords
Acetate; Propionate; Methanogenic community; Methanogens; Acetate propionate ratio; Biogas
First Page Preview
Effect of different acetate:propionate ratios on the methanogenic community during thermophilic anaerobic digestion in batch experiments
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
Publisher
Database: Elsevier - ScienceDirect
Journal: Biochemical Engineering Journal - Volume 90, 15 September 2014, Pages 154–161
Authors
, , ,
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