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A pH-based control of ammonia in biogas during anaerobic digestion of artificial pig manure and maize silage

Paper ID Volume ID Publish Year Pages File Format Full-Text
36327 45129 2006 4 PDF Available
Title
A pH-based control of ammonia in biogas during anaerobic digestion of artificial pig manure and maize silage
Abstract

The purposes of this study were to prove that ammonia can be present in biogas from anaerobic digestion and to control this ammonia by reducing the reactor pH. Ammonia containing biogas was produced for a period of more than 100 days, with a maximum of 332 ppm. Especially during periods of high free ammonia concentrations in the reactor was ammonia present in biogas. The free ammonia was effectively reduced to less than the inhibition level by pH-based control and the ammonia in biogas concentration was reduced to 9 ppm. Simultaneously the CH4-yield was severely reduced. A pH-based control of ammonia in biogas with a satisfactory biogas production was thus so far proven not to be achievable. In the carrying out this study it was shown that high ammonia concentrations lead to a range of problems: process inhibition, decreased COD removal efficiency, reduced biogas production, malodour and a poor biogas quality that requires treatment.

Keywords
Ammonia; Biogas; pH-based control; Inhibition; Anaerobic digestion
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A pH-based control of ammonia in biogas during anaerobic digestion of artificial pig manure and maize silage
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Publisher
Database: Elsevier - ScienceDirect
Journal: Process Biochemistry - Volume 41, Issue 6, June 2006, Pages 1235–1238
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