Performance and microbial diversity of palm oil mill effluent microbial fuel cell
- Performance and microbial diversity of palm oil mill effluent microbial fuel cell
- Bor Chyan Jong; P.W.Y. Liew; M. Lebai Juri; 김병홍; A.Z. Mohd. Dzomir; K.W. Leo; M.R. Awang
- bioenergy; electrochemically active bacteria; microbial fuel cell; palm oil mill effluent; wastewater treatment
- Issue Date
- Letters in applied microbiology
- VOL 53, NO 6, 660-667
- Aim: To evaluate the bioenergy generation and the microbial community structure
from palm oil mill effluent using microbial fuel cell.
Methods and Results: Microbial fuel cells enriched with palm oil mill effluent
(POME) were employed to harvest bioenergy from both artificial wastewater
containing acetate and complex POME. The microbial fuel cell (MFC) showed
maximum power density of 3004 mW m-2 after continuous feeding with artificial
wastewater containing acetate substrate. Subsequent replacement of the
acetate substrate with complex substrate of POME recorded maximum power
density of 622 mW m-2. Based on 16S rDNA analyses, relatively higher abundance
of Deltaproteobacteria (88ㆍ5%) was detected in the MFCs fed with acetate
artificial wastewater as compared to POME. Meanwhile, members of Gammaproteobacteria,
Epsilonproteobacteria and Betaproteobacteria codominated the
microbial consortium of the MFC fed with POME with 21, 20 and 18ㆍ5%
Conclusions: Enriched electrochemically active bacteria originated from POME
demonstrated potential to generate bioenergy from both acetate and complex
POME substrates. Further improvements including the development of MFC
systems that are able to utilize both fermentative and nonfermentative substrates
in POME are needed to maximize the bioenergy generation.
Significance and Impact of the Study: A better understanding of microbial
structure is critical for bioenergy generation from POME using MFC. Data
obtained in this study improve our understanding of microbial community
structure in conversion of POME to electricity.
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