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Development of bioelectrochemical systems using various biogas fermenter effluents as inocula and municipal waste liquor as adapting substrate

2018; Elsevier BV; Volume: 259; Linguagem: Inglês

10.1016/j.biortech.2018.03.034

1873-2976

Péter Bakonyi, László Koók, Enikő Keller, Katalin Bélafi–Bakó, Tamás Rózsenberszki, Ganesh Dattatraya Saratale, Dinh Duc Nguyen, J. Rajesh Banu, Nándor Nemestóthy,

Membrane-based Ion Separation Techniques

The purpose of this research was to improve microbial fuel cell (MFC) performance - treating landfill-derived waste liquor - by applying effluents of various biogas fermenters as inocula. It turned out that the differences of initial microbial community profiles notably influenced the efficiency of MFCs. In fact, the adaptation time (during 3 weeks of operation) has varied significantly, depending on the source of inoculum and accordingly, the obtainable cumulative energy yields were also greatly affected (65% enhancement in case of municipal wastewater sludge inoculum compared to sugar factory waste sludge inoculum). Hence, it could be concluded that the capacity of MFCs to utilize the complex feedstock was heavily dependent on biological factors such as the origin/history of inoculum, the microbial composition as well as proper acclimation period. Therefore, these parameters should be of primary concerns for adequate process design to efficiently generate electricity with microbial fuel cells.