Olive mill wastewater treatment in single-chamber air-cathode microbial fuel cells


Bermek H., Catal T., AKAN S. S., ULUTAS M. S., KUMRU M., Özgüven M., ...More

WORLD JOURNAL OF MICROBIOLOGY & BIOTECHNOLOGY, vol.30, no.4, pp.1177-1185, 2014 (SCI-Expanded) identifier identifier identifier

  • Publication Type: Article / Article
  • Volume: 30 Issue: 4
  • Publication Date: 2014
  • Doi Number: 10.1007/s11274-013-1541-8
  • Journal Name: WORLD JOURNAL OF MICROBIOLOGY & BIOTECHNOLOGY
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.1177-1185
  • Keywords: Olive mill wastewater, Microbial fuel cell, Electricity generation, Microbial dynamics, Phenolic compounds biodegradation, ELECTRICITY-GENERATION
  • Istanbul Technical University Affiliated: Yes

Abstract

Olive mill wastewaters create significant environmental issues in olive-processing countries. One of the most hazardous groups of pollutants in these wastewaters is phenolic compounds. Here, olive mill wastewater was used as substrate and treated in single-chamber air-cathode microbial fuel cells. Olive mill wastewater yielded a maximum voltage of 381 mV on an external resistance of 1 ka"broken vertical bar. Notable decreases in the contents of 3,4-dihydroxybenzoic acid, tyrosol, gallic acid and p-coumaric acid were detected. Chemical oxygen demand removal rates were 65 % while removal of total phenolics by the process was lower (49 %). Microbial community analysis during the olive mill wastewater treating MFC has shown that both exoelectrogenic and phenol-degrading microorganisms have been enriched during the operation. Brevundimonas-, Sphingomonas- and Novosphingobium-related phylotypes were enriched on the anode biofilm, while Alphaproteobacteria and Bacteriodetes dominated the cathode biofilm. As one of the novel studies, it has been demonstrated that recalcitrant olive mill wastewaters could be treated and utilized for power generation in microbial fuel cells.