Article ID Journal Published Year Pages File Type
7069810 Bioresource Technology 2016 28 Pages PDF
Abstract
Proof of principle of biohythane and potential energy production from garden waste (GW) is demonstrated in this study in a two-step process coupling dark fermentation and anaerobic digestion. The synergistic effect of using co-cultures of extreme thermophiles to intensify biohydrogen dark fermentation is demonstrated using xylose, cellobiose and GW. Co-culture of Caldicellulosiruptor saccharolyticus and Thermotoga maritima showed higher hydrogen production yields from xylose (2.7 ± 0.1 mol mol−1 total sugar) and cellobiose (4.8 ± 0.3 mol mol−1 total sugar) compared to individual cultures. Co-culture of extreme thermophiles C. saccharolyticus and Caldicellulosiruptor bescii increased synergistically the hydrogen production yield from GW (98.3 ± 6.9 L kg−1 (VS)) compared to individual cultures and co-culture of T. maritima and C. saccharolyticus. The biochemical methane potential of the fermentation end-products was 322 ± 10 L kg−1 (CODt). Biohythane, a biogas enriched with 15% hydrogen could be obtained from GW, yielding a potential energy generation of 22.2 MJ kg−1 (VS).
Related Topics
Physical Sciences and Engineering Chemical Engineering Process Chemistry and Technology
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