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231225s2021 xx |||||o 00| ||eng c |
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|a 10.1177/0734242X20957395
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|a eng
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|a Issah, Abdul-Aziz
|e verfasserin
|4 aut
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|a Impact of volatile fatty acids to alkalinity ratio and volatile solids on biogas production under thermophilic conditions
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|c 2021
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|a Text
|b txt
|2 rdacontent
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|a ƒaComputermedien
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|a ƒa Online-Ressource
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|a Date Completed 08.07.2021
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|a Date Revised 08.07.2021
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|a published: Print-Electronic
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|a Citation Status MEDLINE
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|a The study assessed the impact of volatile fatty acids (VFA) to total alkalinity (TA) ratio (VFA/TA), and percentage volatile solids (VS) reduction of batch and semi-continuous anaerobic co-digestion of palm nut paste waste (PNPW) and anaerobic-digested rumen waste (ADRW) on digester stability and biogas production under the environmental condition of 50 ± 1°C and hydraulic retention time of 21 days for the batch studies and 14 days for semi-continuous co-digestion. The co-digestion ratios were based on percentage digester volume corresponding to 90%:10%, 75%:25% and 50%:50%. During batch and semi-continuous anaerobic co-digestion, VFA/TA of 0.32-1.0 and VS reduction of 53-67% were observed as the stable range at which biogas production was maximum. In terms of semi-continuous anaerobic digestion (AD), except for the 50%:50% ratio where biogas production progressed steadily from the first to fourteenth days, biogas production initially dropped from 180.1 to 171.3 mL between the first and third days of the 90%:10% reaching a maximum of 184 mL on the fourteenth day. Biogas production declined from 198.8 to 187.5 mL on the second day and then increased to 198.8 ± 0.5 mL in the case of the 75%:25% with a significant difference between the treatment ratios at p < 0.05. Therefore, the study can confirm that the 50%:50% ratio (PNPW:ADRW) is a suitable option for managing crude fat-based waste under thermophilic AD due to its potential for rapid start-up and complete biodegradation of active biomass within a 21-day period. This presupposes that residual methane as greenhouse gas will be void in the effluent if disposed of
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|a Journal Article
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|a Biogas
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|a ammonium–nitrogen
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|a digestate
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|a thermophilic
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|a total alkalinity
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|a volatile fatty acids
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|a Biofuels
|2 NLM
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|a Fatty Acids, Volatile
|2 NLM
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|a Methane
|2 NLM
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|a OP0UW79H66
|2 NLM
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|a Kabera, Telesphore
|e verfasserin
|4 aut
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|i Enthalten in
|t Waste management & research : the journal of the International Solid Wastes and Public Cleansing Association, ISWA
|d 1991
|g 39(2021), 6 vom: 01. Juni, Seite 871-878
|w (DE-627)NLM098164791
|x 1096-3669
|7 nnns
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|g volume:39
|g year:2021
|g number:6
|g day:01
|g month:06
|g pages:871-878
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