1. Hydrogen and methane production in a bio-electrochemical system assisted anaerobic baffled reactor
- Author
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Liu Lin, Jha Ajay Kumar, Zhu Gefu, Liu Chaoxiang, Huang Xu, and Zou Ran
- Subjects
Hydrogen ,Hydraulic retention time ,Renewable Energy, Sustainability and the Environment ,Chemistry ,Methanogenesis ,Chemical oxygen demand ,Energy Engineering and Power Technology ,chemistry.chemical_element ,Condensed Matter Physics ,Pulp and paper industry ,Methane ,chemistry.chemical_compound ,Fuel Technology ,Fermentative hydrogen production ,Effluent ,Hydrogen production - Abstract
In this study, a new process was proposed to enhance the stability and efficiency of an anaerobic baffled reactor (ABR). The process was examined in a four equal compartments ABR with total volume of 3.46 L. The first compartment was operated for fermentative hydrogen production and the last three compartments were used as continuous singer chamber microbial electrolysis cells (MECs) for methanogenesis. The system was operated at 35 ± 1 °C and hydraulic retention time (HRT) of 24 h with influent chemical oxygen demand (COD) concentration of 3500 mg/L–4000 mg/L. The results indicated that the proportion of hydrogen in the first compartment was 20.7% and proportions of methane in the last three compartments were 98.0%, 93.6% and 70.1%, respectively. A total of 98.0% of COD removal rate was achieved as well. Hence, this new system has following advantages: hydrogen production with cleaner effluent, high COD removal rate, and net methane production for practical use.
- Published
- 2014