Methane inhibition from a slurry storage by addition of chemical and natural additives

Mohd Saufi Bastami, . and Jones Davey, . and Chadwick Dave, . Methane inhibition from a slurry storage by addition of chemical and natural additives. pp. 1-16. ISSN 1394-9829

Mitigating methane (CH4) emission from beef and dairy slurry manure by biogas processing is well adopted. However the main constrains for small-medium farmers are start-up infrastructure maintenance costs and efficiency and these issues need to be attended. A study was carried out to assess an alternative strategy in reducing CH4 emission during beef slurry storage by means of using additives. In doing so cattle slurry from commercial beef farm was collected and stored with various additives at small scale (500 mL). The slurry CH4 emission pH and oxidation redox potential (ORP) value were observed during the storage period. A closed respiratory meter (Micro-Oxymax) was employed to monitor the methane emissions during storage. Notably a reduction in slurry pH (pH 4.0) through the addition of hydrochloric acid (HCl) has significantly reduced (p 0.05) CH4 emission. Furthermore the addition of glucose (10 w/ v) has reduced slurry pH to 0.10 CH4). Apart from that glucose addition revealed inconsistent effect on volatile fatty acids production and hence the mechanism for self-acidification is unclear. The addition of fermentable carbohydrates into slurry during storage period induced acidification by anaerobic fermentation which subsequently has inhibited CH4 emission.

Full text available from: Official URL: http://jtafs.mardi.gov.my/jtafs/46-1/slurry.pdf

Abstract

Mitigating methane (CH4) emission from beef and dairy slurry manure by biogas processing is well adopted. However the main constrains for small-medium farmers are start-up infrastructure maintenance costs and efficiency and these issues need to be attended. A study was carried out to assess an alternative strategy in reducing CH4 emission during beef slurry storage by means of using additives. In doing so cattle slurry from commercial beef farm was collected and stored with various additives at small scale (500 mL). The slurry CH4 emission pH and oxidation redox potential (ORP) value were observed during the storage period. A closed respiratory meter (Micro-Oxymax) was employed to monitor the methane emissions during storage. Notably a reduction in slurry pH (pH 4.0) through the addition of hydrochloric acid (HCl) has significantly reduced (p 0.05) CH4 emission. Furthermore the addition of glucose (10 w/ v) has reduced slurry pH to 0.10 CH4). Apart from that glucose addition revealed inconsistent effect on volatile fatty acids production and hence the mechanism for self-acidification is unclear. The addition of fermentable carbohydrates into slurry during storage period induced acidification by anaerobic fermentation which subsequently has inhibited CH4 emission.

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Item Type:	Article
AGROVOC Term:	Methane
AGROVOC Term:	Additives
AGROVOC Term:	Inhibition
AGROVOC Term:	Storage
AGROVOC Term:	Slurry
AGROVOC Term:	emission
AGROVOC Term:	Liquid manures
AGROVOC Term:	Biogas
AGROVOC Term:	Cost analysis
AGROVOC Term:	Oxidation
Geographical Term:	Malaysia
Depositing User:	Ms. Suzila Mohamad Kasim
Last Modified:	30 Apr 2025 01:15
URI:	http://webagris.upm.edu.my/id/eprint/24365

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