Physico-chemical characterization of selected feedstocks as co-substrates for household biogas generation in Ghana

Substituting biogas for Liquefied Petroleum Gas (LPG) in households is a long-awaited sustainable solution for the increasing cost of energy and large amounts of household human-generated waste. Nevertheless, a study of the characteristics of feedstocks is essential to maximise their energy potentia...

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Published in:International journal of sustainable engineering 2023-12, Vol.16 (1), p.117-128
Main Authors: Appiagyei Osei-Owusu, Blissbern, Baidoo, Martina Francisca, Arthur, Richard, Oduro-Kwarteng, Sampson
Format: Article
Language:English
Subjects:
Alkalinity
Anaerobic co-digestion
Anaerobic digestion
Biodegradation
Biogas
biogas potential
Calcium carbonate
Cattle manure
Chemical properties
Dung
feedstock
food waste
Households
human excreta
Liquefied gases
Liquefied petroleum gas
Nitrogen
Physicochemical properties
Raw materials
Substrates
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container_title International journal of sustainable engineering
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creator Appiagyei Osei-Owusu, Blissbern
Baidoo, Martina Francisca
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description Substituting biogas for Liquefied Petroleum Gas (LPG) in households is a long-awaited sustainable solution for the increasing cost of energy and large amounts of household human-generated waste. Nevertheless, a study of the characteristics of feedstocks is essential to maximise their energy potential. Consequently, this study examined the physico-chemical properties of Human Excreta (HE), Food Leftovers (FLO), Kitchen Residue (KR) and Cow Dung (CD) of Ghanaian origin adhering to recommended standards. Results for volatile to total solid ratios (VS/TS) were 0.81 ± 0.001, 0.97 ± 0.001,0.89 ± 0.001 and 0.85 ± 0.001 for HE, FLO, KR and CD, respectively. The results showed that all feedstocks had high biodegradable content, making them desirable for biogas production. The carbon-to-nitrogen (C/N) ratios determined from the elemental compositions were 8.29 ± 0.09, 22.14 ± 0.26, 23.34 ± 0.25 and 26.19 ± 0.47 for HE, FLO, KR and CD, respectively. Although the C/N ratios for FLO, KR and CD were within the optimal range, that of HE was significantly low. With a mean alkalinity of 1219.67 ± 1.53, 630.00 ± 0.58, 590.00 ± 2.08 and 15,730.00 ± 6.00 mg CaCO 3 eq./L for HE, FLO, KR and CD, it was observed that only CD has the optimal alkalinity value for anaerobic digestion. This brings into perspective the need for co-digestion and the choice of potential co-substrates for household biogas production.
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source Taylor & Francis Open Access; EZB Electronic Journals Library
subjects Alkalinity
Anaerobic co-digestion
Anaerobic digestion
Biodegradation
Biogas
biogas potential
Calcium carbonate
Cattle manure
Chemical properties
Dung
feedstock
food waste
Households
human excreta
Liquefied gases
Liquefied petroleum gas
Nitrogen
Physicochemical properties
Raw materials
Substrates
title Physico-chemical characterization of selected feedstocks as co-substrates for household biogas generation in Ghana
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