Efficient anaerobic digestion of a mild wet air pretreated molasses ethanol distillery stillage: A comparative approach
The effect of a mild, wet air pretreatment and the subsequent anaerobic digestion (AD) was examined on the recovery of a complex and toxic molasses ethanol distillery stillage. The biogas yield and organics removal due to pretreatment were compared with the raw stillage AD. The application of a scor...
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| Language: | English |
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Elsevier
2020-11-01
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| Series: | Heliyon |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2405844020323823 |
| _version_ | 1819176022768091136 |
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| author | Getachew Dagnew Gebreeyessus Trichur Ramaswamy Sreekrishnan Andualem Mekonnen Yonas Chebude Esayas Alemayehu |
| author_facet | Getachew Dagnew Gebreeyessus Trichur Ramaswamy Sreekrishnan Andualem Mekonnen Yonas Chebude Esayas Alemayehu |
| author_sort | Getachew Dagnew Gebreeyessus |
| collection | DOAJ |
| description | The effect of a mild, wet air pretreatment and the subsequent anaerobic digestion (AD) was examined on the recovery of a complex and toxic molasses ethanol distillery stillage. The biogas yield and organics removal due to pretreatment were compared with the raw stillage AD. The application of a scoria support in this industrial residue AD process stability was also assessed. Consequently, a statistically significant cumulative specific methane recovery difference (p-value = 0.000) with an almost complete biological oxygen demand (BOD) removal and a significant chemical oxygen demand (COD) reduction, which were 100% and 92% respectively were achieved. Additionally, the biogas recovery rate was hastened due to pretreatment. The application of scoria, whose property has been instrumentally inspected, has helped stabilize the pH in the AD systems. In a comparative approach, this study suggests the energy benefit and an ecofriendly discharge of stillage by the ethanol industry towards sustainability. |
| first_indexed | 2024-12-22T21:04:09Z |
| format | Article |
| id | doaj.art-822263142ce6486db80a62376e871ab7 |
| institution | Directory Open Access Journal |
| issn | 2405-8440 |
| language | English |
| last_indexed | 2024-12-22T21:04:09Z |
| publishDate | 2020-11-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Heliyon |
| spelling | doaj.art-822263142ce6486db80a62376e871ab72022-12-21T18:12:44ZengElsevierHeliyon2405-84402020-11-01611e05539Efficient anaerobic digestion of a mild wet air pretreated molasses ethanol distillery stillage: A comparative approachGetachew Dagnew Gebreeyessus0Trichur Ramaswamy Sreekrishnan1Andualem Mekonnen2Yonas Chebude3Esayas Alemayehu4Africa Center of Excellence for Water Management, Addis Ababa University, P.O. Box 1176, Addis Ababa, Ethiopia; Department of UEM, Kotebe Metropolitan University, P.O. Box 31248, Addis Ababa, Ethiopia; Corresponding author.Department of Biochemical Engineering and Biotechnology, IIT Delhi, IndiaCenter for Environmental Sciences, Addis Ababa University, P.O. Box 1176, Addis Ababa, EthiopiaDepartment of Chemistry, Addis Ababa University, P.O. Box 1176, Addis Ababa, EthiopiaJimma Institute of Technology, Jimma University, P.O. Box 378, Jimma, EthiopiaThe effect of a mild, wet air pretreatment and the subsequent anaerobic digestion (AD) was examined on the recovery of a complex and toxic molasses ethanol distillery stillage. The biogas yield and organics removal due to pretreatment were compared with the raw stillage AD. The application of a scoria support in this industrial residue AD process stability was also assessed. Consequently, a statistically significant cumulative specific methane recovery difference (p-value = 0.000) with an almost complete biological oxygen demand (BOD) removal and a significant chemical oxygen demand (COD) reduction, which were 100% and 92% respectively were achieved. Additionally, the biogas recovery rate was hastened due to pretreatment. The application of scoria, whose property has been instrumentally inspected, has helped stabilize the pH in the AD systems. In a comparative approach, this study suggests the energy benefit and an ecofriendly discharge of stillage by the ethanol industry towards sustainability.http://www.sciencedirect.com/science/article/pii/S2405844020323823Chemical engineeringBioengineeringEnvironmental scienceEnvironmental engineeringEnvironmental hazardEnvironmental health |
| spellingShingle | Getachew Dagnew Gebreeyessus Trichur Ramaswamy Sreekrishnan Andualem Mekonnen Yonas Chebude Esayas Alemayehu Efficient anaerobic digestion of a mild wet air pretreated molasses ethanol distillery stillage: A comparative approach Heliyon Chemical engineering Bioengineering Environmental science Environmental engineering Environmental hazard Environmental health |
| title | Efficient anaerobic digestion of a mild wet air pretreated molasses ethanol distillery stillage: A comparative approach |
| title_full | Efficient anaerobic digestion of a mild wet air pretreated molasses ethanol distillery stillage: A comparative approach |
| title_fullStr | Efficient anaerobic digestion of a mild wet air pretreated molasses ethanol distillery stillage: A comparative approach |
| title_full_unstemmed | Efficient anaerobic digestion of a mild wet air pretreated molasses ethanol distillery stillage: A comparative approach |
| title_short | Efficient anaerobic digestion of a mild wet air pretreated molasses ethanol distillery stillage: A comparative approach |
| title_sort | efficient anaerobic digestion of a mild wet air pretreated molasses ethanol distillery stillage a comparative approach |
| topic | Chemical engineering Bioengineering Environmental science Environmental engineering Environmental hazard Environmental health |
| url | http://www.sciencedirect.com/science/article/pii/S2405844020323823 |
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