Research output: Contribution to Journal/Magazine › Journal article › peer-review
Research output: Contribution to Journal/Magazine › Journal article › peer-review
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TY - JOUR
T1 - Co-fermentation of whey permeates and cattle slurry using a partitioned up-flow anaerobic digestion tank
AU - Fagbohungbe, M.O.
AU - Onyeri, C.A.
AU - Semple, K.T.
PY - 2019/10/15
Y1 - 2019/10/15
N2 - Whey permeate and slurry are both from the dairy farm animals while whey is characterised with high acidity the slurry is mildly alkaline, and they are both biodegradable. In this study, a lab-scale partitioned up-flow anaerobic digestion tank was used to achieve a suitable feeding regime for co-fermenting whey permeate and slurry. The partitioned up-flow anaerobic digestion tank provided a stable treatment performance with over 95% of sugar reduction and a total volatile fatty acid concentration under 150 mg/L. The ripely ratio of the reactor was below 0.4 which suggest strong buffering stability. Biogas production surged with an increase in the feeding regime from 1:1 to 4:1 with a maximum value of 3.5 L/d. This was not the case for the methane content which continued to reduce as the feeding regime increased from 2:1 to 4:1. The feeding regime of 2:1 recorded the highest methane composition between 40 and 50% which suggests this is the best feeding regime for co-fermenting whey permeate and slurry using a partitioned up-flow anaerobic digestion tank.
AB - Whey permeate and slurry are both from the dairy farm animals while whey is characterised with high acidity the slurry is mildly alkaline, and they are both biodegradable. In this study, a lab-scale partitioned up-flow anaerobic digestion tank was used to achieve a suitable feeding regime for co-fermenting whey permeate and slurry. The partitioned up-flow anaerobic digestion tank provided a stable treatment performance with over 95% of sugar reduction and a total volatile fatty acid concentration under 150 mg/L. The ripely ratio of the reactor was below 0.4 which suggest strong buffering stability. Biogas production surged with an increase in the feeding regime from 1:1 to 4:1 with a maximum value of 3.5 L/d. This was not the case for the methane content which continued to reduce as the feeding regime increased from 2:1 to 4:1. The feeding regime of 2:1 recorded the highest methane composition between 40 and 50% which suggests this is the best feeding regime for co-fermenting whey permeate and slurry using a partitioned up-flow anaerobic digestion tank.
KW - Co-digestion
KW - Biogas production
KW - Whey permeates
KW - Up flow anaerobic digestion tank
U2 - 10.1016/j.energy.2019.07.051
DO - 10.1016/j.energy.2019.07.051
M3 - Journal article
VL - 185
SP - 567
EP - 572
JO - Energy
JF - Energy
SN - 0360-5442
ER -