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Converti, A.; Oliveira, R.P.S.; Torres, B.R.; Lodi, A.; Zilli, M.
Bioresource technology, 12/2009, Letnik: 100, Številka: 23Journal Article
The scope of this research work was to investigate biogas production and purification by a two-step bench-scale biological system, consisting of fed-batch pulse-feeding anaerobic digestion of mixed sludge, followed by methane enrichment of biogas by the use of the cyanobacterium Arthrospira platensis. The composition of biogas was nearly constant, and methane and carbon dioxide percentages ranged between 70.5–76.0% and 13.2–19.5%, respectively. Biogas yield reached a maximum value (about 0.4 m 3 biogas/kgCOD i) at 50 days-retention time and then gradually decreased with a decrease in the retention time. Biogas CO 2 was then used as a carbon source for A. platensis cultivation either under batch or fed-batch conditions. The mean cell productivity of fed-batch cultivation was about 15% higher than that observed during the last batch phase (0.035 ± 0.006 g DM/L/d), likely due to the occurrence of some shading effect under batch growth conditions. The data of carbon dioxide removal from biogas revealed the existence of a linear relationship between the rates of A. platensis growth and carbon dioxide removal from biogas and allowed calculating carbon utilization efficiency for biomass production of almost 95%.
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Leto | Faktor vpliva | Izdaja | Kategorija | Razvrstitev | ||||
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JCR | SNIP | JCR | SNIP | JCR | SNIP | JCR | SNIP |
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in: SICRIS
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