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Acidogenic fermentation of food waste for short-chain fatty acids (SCFAs) production- Effect of inoculum type and heat pre-treatment, and pH under room temperature
Authors: Sharli H Jodhani,
Abid Hussain
Identifier: CSBE23186
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Published in: CSBE-SCGAB Technical Conferences » AGM Lethbridge 2023
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Description: In Canada, 35.6 million tonnes of municipal solid waste (MSW) was generated in 2018, of which 30-35% was comprised of food waste. A major proportion of this food waste (up to 77%) has been diverted to landfills which causes significant greenhouse gas emissions (GHG) and incurs over $3 billion in landfill management. Thus, as a sustainable approach to waste management and resource recovery - the acidogenic fermentation process is gaining attention which transforms food waste into valuable products such as short-chain fatty acids (SCFAs). However, acidogenic fermentation processes are typically studied at higher temperatures (35-55?C), which may require significant energy input for heating in cooler climates like Canada. This study aimed to optimize the acidogenic fermentation process for food waste at room temperature (22-24?C) by investigating the impact of inoculum type, inoculum pre-treatment, and pH on hydrolysis and SCFA production. Results showed that non-heated inoculums achieved higher hydrolysis. Heat pre-treatment significantly impacted SCFA production, with the maximum SCFA yield of 238 g CODSCFA/kg VSadded achieved with heat pre-treated anaerobic digested sludge inoculum. Butyrate was the dominant SCFA component for all inoculum types, and the highest hydrogen yield was achieved with non-heated inoculums. Neutral to alkaline pH favored the hydrolysis, while the maximum SCFA production was achieved at neutral pH i.e. 238 g CODSCFA/kg VSadded. Acetate comprised the major fraction of SCFA at alkaline pH, while butyrate was the dominant SCFA at neutral. The alkaline pH favored hydrogen production, resulting in the highest hydrogen yield at pH 9.
Keywords: Acidogenic fermentation, Food waste, Short-chain fatty acids, bioprocess, high value chemicals
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Date: 2023-07-23
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Conference name: CSBE/SCGAB 2023 Annual Conference, Lethbridge, Alberta, 23-26 July 2023.
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Type: Presentation
Format:
Publication type: Text.Abstract
Source:
Relation:
Coverage: North_America
Language 1: en
Language 2:
Rights: Canadian Society for Bioengineering
Notes:
Other files:
DOI:
Description: In Canada, 35.6 million tonnes of municipal solid waste (MSW) was generated in 2018, of which 30-35% was comprised of food waste. A major proportion of this food waste (up to 77%) has been diverted to landfills which causes significant greenhouse gas emissions (GHG) and incurs over $3 billion in landfill management. Thus, as a sustainable approach to waste management and resource recovery - the acidogenic fermentation process is gaining attention which transforms food waste into valuable products such as short-chain fatty acids (SCFAs). However, acidogenic fermentation processes are typically studied at higher temperatures (35-55?C), which may require significant energy input for heating in cooler climates like Canada. This study aimed to optimize the acidogenic fermentation process for food waste at room temperature (22-24?C) by investigating the impact of inoculum type, inoculum pre-treatment, and pH on hydrolysis and SCFA production. Results showed that non-heated inoculums achieved higher hydrolysis. Heat pre-treatment significantly impacted SCFA production, with the maximum SCFA yield of 238 g CODSCFA/kg VSadded achieved with heat pre-treated anaerobic digested sludge inoculum. Butyrate was the dominant SCFA component for all inoculum types, and the highest hydrogen yield was achieved with non-heated inoculums. Neutral to alkaline pH favored the hydrolysis, while the maximum SCFA production was achieved at neutral pH i.e. 238 g CODSCFA/kg VSadded. Acetate comprised the major fraction of SCFA at alkaline pH, while butyrate was the dominant SCFA at neutral. The alkaline pH favored hydrogen production, resulting in the highest hydrogen yield at pH 9.
Keywords: Acidogenic fermentation, Food waste, Short-chain fatty acids, bioprocess, high value chemicals
Résumé:
Mots-clés:
Citation:
Volume:
Issue:
Pages -
Contributor:
Date: 2023-07-23
Technical field:
Conference name: CSBE/SCGAB 2023 Annual Conference, Lethbridge, Alberta, 23-26 July 2023.
Session name:
Other information:
Type: Presentation
Format:
Publication type: Text.Abstract
Source:
Relation:
Coverage: North_America
Language 1: en
Language 2:
Rights: Canadian Society for Bioengineering
Notes:
Other files:
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