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Mixed sulfate-reducing bacteria-enriched microbial fuel cells for the treatment of wastewater containing copper.
Chemosphere. 2017 Dec; 189:134-142.C

Abstract

Microbial fuel cells (MFCs) have been widely investigated for organic-based waste/substrate conversion to electricity. However, toxic compounds such as heavy metals are ubiquitous in organic waste and wastewater. In this work, a sulfate reducing bacteria (SRB)-enriched anode is used to study the impact of Cu2+ on MFC performance. This study demonstrates that MFC performance is slightly enhanced at concentrations of up to 20 mg/L of Cu2+, owing to the stimulating effect of metals on biological reactions. Cu2+ removal involves the precipitation of metalloids out of the solution, as metal sulfide, after they react with the sulfide produced by SRB. Simultaneous power generation of 224.1 mW/m2 at lactate COD/SO42- mass ratio of 2.0 and Cu2+ of 20 mg/L, and high Cu2+ removal efficiency, at >98%, are demonstrated in the anodic chamber of a dual-chamber MFC. Consistent MFC performance at 20 mg/L of Cu2+ for ten successive cycles shows the excellent reproducibility of this system. In addition, total organic content and sulfate removal efficiencies greater than 85% and 70%, respectively, are achieved up to 20 mg/L of Cu2+ in 48 h batches. However, higher metal concentration and very low pH at <4.0 inhibit the SRB MFC system. Microbial community analysis reveals that Desulfovibrio is the most abundant SRB in anode biofilm at the genus level, at 38.1%. The experimental results demonstrate that biological treatment of low-concentration metal-containing wastewater with SRB in MFCs can be an attractive technique for the bioremediation of this type of medium with simultaneous energy generation.

Authors+Show Affiliations

Department of Environmental Engineering, Kyungpook National University, 80 Daehak-ro, Buk-gu, Daegu, 41566, Republic of Korea.Department of Environmental Engineering, Kyungpook National University, 80 Daehak-ro, Buk-gu, Daegu, 41566, Republic of Korea.Department of Environmental Engineering, Kyungpook National University, 80 Daehak-ro, Buk-gu, Daegu, 41566, Republic of Korea.Department of Environmental Engineering, Kyungpook National University, 80 Daehak-ro, Buk-gu, Daegu, 41566, Republic of Korea.Department of Life Science, Chung-Ang University, Seoul, 06974, Republic of Korea.Department of Life Science, Chung-Ang University, Seoul, 06974, Republic of Korea.Department of Environmental Engineering, Kyungpook National University, 80 Daehak-ro, Buk-gu, Daegu, 41566, Republic of Korea. Electronic address: daesung@knu.ac.kr.

Pub Type(s)

Journal Article

Language

eng

PubMed ID

28934653

Citation

Miran, Waheed, et al. "Mixed Sulfate-reducing Bacteria-enriched Microbial Fuel Cells for the Treatment of Wastewater Containing Copper." Chemosphere, vol. 189, 2017, pp. 134-142.
Miran W, Jang J, Nawaz M, et al. Mixed sulfate-reducing bacteria-enriched microbial fuel cells for the treatment of wastewater containing copper. Chemosphere. 2017;189:134-142.
Miran, W., Jang, J., Nawaz, M., Shahzad, A., Jeong, S. E., Jeon, C. O., & Lee, D. S. (2017). Mixed sulfate-reducing bacteria-enriched microbial fuel cells for the treatment of wastewater containing copper. Chemosphere, 189, 134-142. https://doi.org/10.1016/j.chemosphere.2017.09.048
Miran W, et al. Mixed Sulfate-reducing Bacteria-enriched Microbial Fuel Cells for the Treatment of Wastewater Containing Copper. Chemosphere. 2017;189:134-142. PubMed PMID: 28934653.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Mixed sulfate-reducing bacteria-enriched microbial fuel cells for the treatment of wastewater containing copper. AU - Miran,Waheed, AU - Jang,Jiseon, AU - Nawaz,Mohsin, AU - Shahzad,Asif, AU - Jeong,Sang Eun, AU - Jeon,Che Ok, AU - Lee,Dae Sung, Y1 - 2017/09/13/ PY - 2017/07/31/received PY - 2017/08/31/revised PY - 2017/09/11/accepted PY - 2017/9/22/pubmed PY - 2018/2/15/medline PY - 2017/9/22/entrez KW - Heavy metals KW - MFC KW - Microbial community KW - Sulfate-reducing bacteria SP - 134 EP - 142 JF - Chemosphere JO - Chemosphere VL - 189 N2 - Microbial fuel cells (MFCs) have been widely investigated for organic-based waste/substrate conversion to electricity. However, toxic compounds such as heavy metals are ubiquitous in organic waste and wastewater. In this work, a sulfate reducing bacteria (SRB)-enriched anode is used to study the impact of Cu2+ on MFC performance. This study demonstrates that MFC performance is slightly enhanced at concentrations of up to 20 mg/L of Cu2+, owing to the stimulating effect of metals on biological reactions. Cu2+ removal involves the precipitation of metalloids out of the solution, as metal sulfide, after they react with the sulfide produced by SRB. Simultaneous power generation of 224.1 mW/m2 at lactate COD/SO42- mass ratio of 2.0 and Cu2+ of 20 mg/L, and high Cu2+ removal efficiency, at >98%, are demonstrated in the anodic chamber of a dual-chamber MFC. Consistent MFC performance at 20 mg/L of Cu2+ for ten successive cycles shows the excellent reproducibility of this system. In addition, total organic content and sulfate removal efficiencies greater than 85% and 70%, respectively, are achieved up to 20 mg/L of Cu2+ in 48 h batches. However, higher metal concentration and very low pH at <4.0 inhibit the SRB MFC system. Microbial community analysis reveals that Desulfovibrio is the most abundant SRB in anode biofilm at the genus level, at 38.1%. The experimental results demonstrate that biological treatment of low-concentration metal-containing wastewater with SRB in MFCs can be an attractive technique for the bioremediation of this type of medium with simultaneous energy generation. SN - 1879-1298 UR - https://www.unboundmedicine.com/medline/citation/28934653/Mixed_sulfate_reducing_bacteria_enriched_microbial_fuel_cells_for_the_treatment_of_wastewater_containing_copper_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S0045-6535(17)31463-7 DB - PRIME DP - Unbound Medicine ER -