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A novel solid-state submerged fermenter (3SF) for acidogenic fermentation of food waste at high volumetric loading: effect of inoculum to substrate ratio, design optimization, and inoculum enrichment
Authors: Virender Singh,
abiA hussain,
Banu Ormici
Identifier: CSBE23187
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Published in: CSBE-SCGAB Technical Conferences » AGM Lethbridge 2023
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Description: Canada is amongst the highest food waste-producing countries on a per capita basis. Landfilling is one of the main methods for food waste management which leads to an economical loss of $3 billion/year. To mitigate such losses, sustainable and cost-effective solutions for the management of food waste are being intensively researched. Food waste is readily biodegradable and can be used as a feedstock to produce high-value chemicals such as short-chain volatile fatty acids (SCFAs) via acidogenic fermentation process. Leach bed reactors (LBRs) are gaining a lot of attention as sustainable bioreactor platforms for SCFA production. However, before successful practical implementation, the two key challenges such as clogging at high volumetric loading (>25 gVS/Lreactor) and long fermentation time (14 days) need to be resolved. A novel solid-state submerged fermenter (3SF) design was developed and investigated for SCFA production. The reactor is comprised of a completely perforated food waste holding chamber which is fully submerged in the inoculum, preventing clogging issues even at high organic loading of >50 gVS/Lreactor. The 3SF was successfully tested at higher inoculum/substrate (ISR) ratios of 4%,6%, 9%, and 16% and achieved 53 - 62% volatile solids reduction, hydrolysis yield between 573 g cumsCOD/gVSadded, and VFA yields of 530 g cumsCOD/gVSadded . Acetate and butyrate were (70 to 80%) dominant SCFAs. Further improvements in the physical design of the 3SF enhanced the reactor performance by 5-7%. Hence, the proposed novel solid-state fermentation reactor design can also be a potential food waste fermentation system for the biorefinery platform.
Keywords: novel submerged state solids fermenter, Acidogenic fermentation
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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
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Publication type: Text.Abstract
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Coverage: North_America
Language 1: en
Language 2:
Rights: Canadian Society for Bioengineering
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DOI:
Description: Canada is amongst the highest food waste-producing countries on a per capita basis. Landfilling is one of the main methods for food waste management which leads to an economical loss of $3 billion/year. To mitigate such losses, sustainable and cost-effective solutions for the management of food waste are being intensively researched. Food waste is readily biodegradable and can be used as a feedstock to produce high-value chemicals such as short-chain volatile fatty acids (SCFAs) via acidogenic fermentation process. Leach bed reactors (LBRs) are gaining a lot of attention as sustainable bioreactor platforms for SCFA production. However, before successful practical implementation, the two key challenges such as clogging at high volumetric loading (>25 gVS/Lreactor) and long fermentation time (14 days) need to be resolved. A novel solid-state submerged fermenter (3SF) design was developed and investigated for SCFA production. The reactor is comprised of a completely perforated food waste holding chamber which is fully submerged in the inoculum, preventing clogging issues even at high organic loading of >50 gVS/Lreactor. The 3SF was successfully tested at higher inoculum/substrate (ISR) ratios of 4%,6%, 9%, and 16% and achieved 53 - 62% volatile solids reduction, hydrolysis yield between 573 g cumsCOD/gVSadded, and VFA yields of 530 g cumsCOD/gVSadded . Acetate and butyrate were (70 to 80%) dominant SCFAs. Further improvements in the physical design of the 3SF enhanced the reactor performance by 5-7%. Hence, the proposed novel solid-state fermentation reactor design can also be a potential food waste fermentation system for the biorefinery platform.
Keywords: novel submerged state solids fermenter, Acidogenic fermentation
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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