Combined effects of enrichment procedure and non-fermentable or fermentable co-substrate on performance and bacterial community for pentachlorophenol degradation in microbial fuel cells.
Combined effects of enrichment procedure and non-fermentable acetate or fermentable glucose on system performance and bacterial community for pentachlorophenol (PCP) degradation in microbial fuel cells (MFCs) were determined in this study. Co-substrate and PCP were added into MFCs either simultaneously or sequentially. Simultaneous addition with glucose (simultaneous-glucose) achieved the shortest acclimation time and the most endurance to heavy PCP shock loads. Species of Alphaproteobacteria (simultaneous-acetate, 33.9%; sequential-acetate, 31.3%), Gammaproteobacteria (simultaneous-glucose, 44.1%) and Firmicutes (sequential-glucose, 31.8%) dominated the complex systems. The genus Sedimentibacter was found to exist in all the cases whereas Spirochaetes were merely developed in simultaneous-acetate and simultaneous-glucose. While Epsilonproteobacteria were only absent from sequential-acetate, simultaneous-glucose benefited to the evolution of Lentisphaerae. These results demonstrate simultaneous-glucose is a strategy for efficient system performance and the microbiological evidence can contribute to improving understanding of and optimizing PCP degradation in MFCs.
Key Laboratory of Industrial Ecology and Environmental Engineering, Ministry of Education (MOE), School of Environmental Science and Technology, Dalian University of Technology, Dalian 116024, China.
Shanshan
S
Wang
Liping
L
Huang
Linlin
L
Gan
Xie
X
Quan
Ning
N
Li
Guohua
G
Chen
Lu
L
Lu
Defeng
D
Xing
Fenglin
F
Yang
D000085:Acetates / Q000378:metabolism; D001419:Bacteria / Q000235:genetics / Q000254:growth & development* / Q000378:metabolism*; D055162:Biocatalysis; D001673:Biodegradation, Environmental; D001674:Bioelectric Energy Sources / Q000382:microbiology*; D055664:Electrochemical Techniques; D004566:Electrodes; D052918:Environmental Restoration and Remediation / Q000379:methods*; D005285:Fermentation; D014644:Genetic Variation; D005947:Glucose / Q000378:metabolism; D059013:Microbial Consortia; D010416:Pentachlorophenol / Q000378:metabolism*; D010802:Phylogeny; D013997:Time Factors
D000085:Acetates; D010416:Pentachlorophenol; D005947:Glucose