Hydrogen production from proteins via electrohydrogenesis in microbial electrolysis cells

Enhanced biohydrogen production from waste activated sludge in combined strategy of chemical pretreatment and microbial electrolysis

“…The VFAs was more easily to be utilized compared to other components in WAS for MEC microorganism. The hydrogen production efficiency was 60.83 mmol-H 2 /g-COD feeding with the acetic in a single chamber MEC [13] and the maximum hydrogen production efficiency was only 21.5 ± 0.2 mmol-H 2 / g-COD when protein was the only substrate [14]. Hence, efficient pretreatment methods should be implemented to overcome these limitations and release more available organic matters for further process.…”

Factors Affecting the Effectiveness of Bioelectrochemical System Applications: Data Synthesis and Meta-Analysis

“…The preference of two-chamber systems in previous studies might have introduced biased results for the comparisons. (e.g., acetate) and the conditions were optimal [38][39][40][41]. The preference of two-chamber systems in previous studies might have introduced biased results for the comparisons.…”

“…In fact, two-chamber systems were more often used in existing studies because of their simplicity and stability. A great variety of substrates and operating conditions have been investigated using two-chamber systems, and oftentimes the substrates were readily biodegradable (e.g., acetate) and the conditions were optimal [38][39][40][41]. The preference of two-chamber systems in previous studies might have introduced biased results for the comparisons.…”

Toward bioenergy recovery from waste activated sludge: improving bio-hydrogen production and sludge reduction by pretreatment coupled with anaerobic digestion–microbial electrolysis cells

“…Firstly, VFAs were the most suitable substrate for MECs to produce hydrogen in a WAS recycling system. 19,20,40,42 Secondly, VFAs could be formed from protein and carbohydrate. Chen et al had reported that HAc, n-HBu and HPr were formed directly from the fermentation of protein and carbohydrate, and the higher molecular weight SCFA such as n-HVa, were largely relevant to the fermentation of protein.…”

“…acetate, propionate, and butyrate), which are subsequently metabolized by exoelectrogens for electricity generation. 41,42 In the researches of both Lu et al and Sun et al, 22,40 fermented WAS aer alkaline pretreatment was used as substrate of MECs to produce bio-hydrogen. The bio-hydrogen yields were 15.08 mg H 2 /g VSS and 14.2 AE 0.4 mg H 2 /g VSS, respectively, which were equivalent with ultrasonication pretreatment (15.48 mg H 2 /g VSS) of this study, but lower than that in heat-alkaline pretreatment (20.30 mg H 2 /g VSS).…”