Enhancing biogas production from tannery wastewater via the incorporation of different quantities of spent coffee grounds
Tannery effluent poses environmental concerns due to its high organic content, hazardous chemicals, and low biodegradability. Spent coffee grounds (SCGs) are nutrient-rich organic waste that are underutilized despite their enormous bioenergy potential. The primary objective of this study was to inve...
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| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Elsevier
2025-07-01
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| Series: | Desalination and Water Treatment |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S1944398625003509 |
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| Summary: | Tannery effluent poses environmental concerns due to its high organic content, hazardous chemicals, and low biodegradability. Spent coffee grounds (SCGs) are nutrient-rich organic waste that are underutilized despite their enormous bioenergy potential. The primary objective of this study was to investigate the impact of varying SCG ratios on biogas production in tannery wastewater (TWW). Producing biogas from TWW is challenging due to the chemicals employed in leather processing, an inadequate carbon-to-nitrogen ratio, and nutrient shortage. SCG contains a high organic carbon and lipid content, which balances the carbon/nitrogen ratio and promotes microbial proliferation. A series of batch anaerobic digestion (AD) studies was conducted on adding different ratios of SCG to TWW at 38 ± 1 0C. The findings indicated that the addition of SCG to TWW improved biogas generation from 6.21 mL/gVS to 130.31 mL/gVS, with a methane composition from 18.62 % to 56.41 %. The maximum biogas production was achieved both qualitatively and quantitatively by adding 15 % SCG to the AD of TWW. The modified Gompertz model provided a consistent fit to the measured data, with correlation values (R2) ranging from 0.92 to 0.96. This study represents a realistic and environmentally sustainable approach to increasing renewable energy recovery from industrial effluents. |
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| ISSN: | 1944-3986 |