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Comparative study of the methane production based on the chemical composition of Mangifera Indica and Manihot Utilissima leaves
ISSN: 2193-1801 ;EISSN: 2193-1801 ;DOI: 10.1186/s40064-015-0832-y ;PMID: 25825684
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Title:
Comparative study of the methane production based on the chemical composition of Mangifera Indica and Manihot Utilissima leaves
Author:
Mambanzulua Ngoma, Philippe
;
Hiligsmann, Serge
;
Sumbu Zola, Eric
;
Culot, Marc
;
Fievez, Thierry
;
Thonart, Philippe
Subjects:
Anaerobic digestion
;
biogas
;
Biotechnologie
;
Biotechnology
;
Energie
;
Energy
;
Engineering, computing & technology
;
Environmental sciences & ecology
;
Ingénierie, informatique & technologie
;
leaves
;
Life sciences
;
Mangifera Indica
;
Manihot Utilissima
;
methane
;
Sciences de l’environnement & écologie
;
Sciences du vivant
Description:
Leaves of Mangifera Indica (MI, mango leaves) and Manihot Utilissima (MU, cassava leaves) are available in tropical regions and are the most accessible vegetal wastes of Kinshasa, capital of Democratic Republic of Congo. These wastes are not suitably managed and are not rationally valorized. They are abandoned in full air, on the soil and in the rivers. They thus pollute environment. By contrast, they can be recuperated and treated in order to produce methane (energy source), organic fertilizer and clean up the environment simultaneously. The main objective of this study was to investigate methane production from MI and MU leaves by BMP tests at 30°C. The yields achieved from the anaerobic digestion of up to 61.3 g raw matter in 1 l medium were 0.001 l/g and 0.100 l CH4/g volatile solids of MI and MU leaves, respectively. The yield of MU leaves was in the range mentioned in the literature for other leaves because of a poor presence of bioactive substrates, and low C/N ratio. This methane yield corresponded to 7% of calorific power of wood. By contrast, the methane yield from MI leaves was almost nil suggesting some metabolism inhibition because of their rich composition in carbon and bioactive substrates. Whereas classical acidogenesis and acetogenesis were recorded. Therefore, methane production from the sole MI leaves seems unfavorable by comparison to MU leaves at the ambient temperature in tropical regions. Their solid and liquid residues obtained after anaerobic digestion would be efficient fertilizers. However, the methane productivity of both leaves could be improved by anaerobic co-digestion.
Publisher:
Springer
Creation Date:
2015
Language:
English
Identifier:
ISSN: 2193-1801
EISSN: 2193-1801
DOI: 10.1186/s40064-015-0832-y
PMID: 25825684
Source:
SpringerOpen
AUTh Library subscriptions: ProQuest Central
GFMER Free Medical Journals
PubMed Central
ROAD: Directory of Open Access Scholarly Resources
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