| Autor: |
Ndubuisi-Nnaji UU; Department of Microbiology, University of Uyo, Uyo, Nigeria., Ofon UA; Department of Microbiology, University of Uyo, Uyo, Nigeria., Offiong NO; International Centre for Energy and Environmental Sustainability Research, University of Uyo, Uyo, Nigeria. |
| Jazyk: |
angličtina |
| Zdroj: |
Waste management & research : the journal of the International Solid Wastes and Public Cleansing Association, ISWA [Waste Manag Res] 2021 Apr; Vol. 39 (4), pp. 594-600. Date of Electronic Publication: 2020 Nov 25. |
| DOI: |
10.1177/0734242X20975092 |
| Abstrakt: |
Laboratory-scale bioreactors were used to co-digest spent coconut copra (SCC) and cow urine (CU) as a co-substrate (SCC + CU) in a batch mode under thermophilic condition (45 ± 2°C) in order to enhance biogas production. The effect of CU pretreatment on the performance indicators (biogas and biomethane yields, total solids (TS), and volatile solids (VS) reduction, pH and volatile fatty acids (VFAs) concentrations) were also examined. This was compared with mono-digestion of SCC. The experiment was performed with different mixing ratios in reactors labelled as follows: A = 75 g SCC + 5 ml CU; B = 70 g SCC + 10 ml CU; C = 65 g SCC + 15 ml CU; and D (control) = 80 g SCC at a hydraulic retention time of 42 days. Co-digestion (SCC + CU) significantly improved anaerobic digestion (AD) performance resulting in a threefold and fivefold increase in biogas and biomethane production, respectively, with concomitant TS (44.9-57.7%) and VS (55.4-60.3%) removal efficiencies. But for mono-digestion (control experiment), all CU treated and co-digestion assays showed pH stability ranging between 6.6 and 7.4 and VFAs' concentrations ranging from 15-330 mgL -1 . By acting as a buffer, CU effectively enhanced the AD performance of SCC as demonstrated in this study. |
| Databáze: |
MEDLINE |
| Externí odkaz: |
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