title: Stimulation of the hydrolytic stage for biogas production from cattle manure in an electrochemical bioreactor.
abstract: Electrical current in the hydrolytic phase of the biogas process might affect biogas yield. In this study, four 1,150 mL single membrane-less chamber electrochemical bioreactors, containing two parallel titanium plates were connected to the electrical source with voltages of 0, -0.5, -1 and -1.5 V, respectively. Reactor 1 with 0 V was considered as a control reactor. The trend of biogas production was precisely checked against pH, oxidation reduction potential and electrical power at a temperature of 37 ± 0.5°C amid cattle manure as substrate for 120 days. Biogas production increased by voltage applied to Reactors 2 and 3 when compared with the control reactor. In addition, the electricity in Reactors 2 and 3 caused more biogas production than Reactor 4. Acetogenic phase occurred more quickly in Reactor 3 than in the other reactors. The obtained results from Reactor 4 were indicative of acidogenic domination and its continuous behavior under electrical stimulation. The results of the present investigation clearly revealed that phasic electrical current could enhance the efficiency of biogas production.
authors: Environmental Engineering, Faculty of Environment, University of Tehran, No. 25 Ghods St., Enghelab Ave., Tehran, Iran E-mail: akarbasi@ut.ac.ir.
authors: Saeed
authors: S
authors: Samani
authors: Environmental Engineering, Faculty of Environment, University of Tehran, No. 25 Ghods St., Enghelab Ave., Tehran, Iran E-mail: akarbasi@ut.ac.ir.
authors: Mohammad Ali
authors: MA
authors: Abdoli
authors: Environmental Engineering, Faculty of Environment, University of Tehran, No. 25 Ghods St., Enghelab Ave., Tehran, Iran E-mail: akarbasi@ut.ac.ir.
authors: Abdolreza
authors: A
authors: Karbassi
authors: Environment Research Center, Research Institute for Primordial Prevention of Non-Communicable Disease, and Department of Environmental Health Engineering, School of Health, Isfahan University of Medical Sciences, Isfahan, Iran.
authors: Mohammad Mehdi
authors: MM
authors: Amin
mesh_terms: D000818:Animals; D056804:Biofuels / Q000032:analysis*; D019149:Bioreactors; D002417:Cattle; D004563:Electrochemistry; D006868:Hydrolysis; D008372:Manure / Q000032:analysis*; D013696:Temperature
chemical_list: D056804:Biofuels; D008372:Manure