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Effect of alkaline treatment pattern on anaerobic fermentation of swine manure

Paper ID Volume ID Publish Year Pages File Format Full-Text
34268 45016 2015 8 PDF Available
Title
Effect of alkaline treatment pattern on anaerobic fermentation of swine manure
Abstract

•Fermentation by initial pH 10 adjustment took less days to reach the same VFAs concentration.•Initial pH 10 adjustment had lower hydrolysis rate but higher acidification rate.•Lachnospiraceae and Porphyromonadaceae were inhibited at continued pH 10 condition.•Phosphorus release was accelerated by continued pH 10 adjustment.

Swine manure contains large amount of organic resource, turning to be a favorable substrate for volatile fatty acids (VFAs) production. Alkaline treatment has demonstrated an effective way to enhance VFAs production. To optimize the alkaline treatment pattern, swine manure fermentation under initial pH 10.0 and continued pH 10.0 conditions was carried out in batch experiments, to evaluate their efficiency on hydrolysis and acidogenesis. The results showed that compared with continued pH 10.0 adjustment, initial pH 10.0 pretreatment achieved similar VFAs production at 11939 mg-COD/l within shorter period. Kinetic analysis demonstrated the rate-limiting step for fermentation under alkaline adjustment was acidogenesis not hydrolysis. High throughput sequencing was applied to investigate microbial community, showing that new non-spore-forming Lachnospiraceae and Porphyromonadaceae enriched during initial pH 10.0 fermentation, while spore-forming Bacillaceae and Sporolactobacillaceae dominated at constant pH 10.0 condition. With lower chemical dosage and higher acidogenesis rate, initial pH 10.0 pretreatment is more favorable than continued pH 10.0 adjustment for swine manure fermentation.

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Keywords
Swine manure; Anaerobic fermentation; pH treatment; Kinetics; Microbial community
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Publisher
Database: Elsevier - ScienceDirect
Journal: Process Biochemistry - Volume 50, Issue 11, November 2015, Pages 1710–1717
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