Anode modification of sediment microbial fuel cells (SMFC) towards bioremediating mariculture wastewater

Jingyue Yang; Yang-Guo Zhao; Xinpei Liu; Yubin Fu

doi:10.1016/j.marpolbul.2022.114013

Anode modification of sediment microbial fuel cells (SMFC) towards bioremediating mariculture wastewater

Mar Pollut Bull. 2022 Sep:182:114013. doi: 10.1016/j.marpolbul.2022.114013. Epub 2022 Aug 5.

Authors

Jingyue Yang¹, Yang-Guo Zhao², Xinpei Liu¹, Yubin Fu³

Affiliations

¹ Shandong Provincial Key Laboratory of Marine Environment and Geological Engineering (MEGE), College of Environmental Science and Engineering, Ocean University of China, Qingdao 266100, China.
² Shandong Provincial Key Laboratory of Marine Environment and Geological Engineering (MEGE), College of Environmental Science and Engineering, Ocean University of China, Qingdao 266100, China; Key Lab of Marine Environmental Science and Ecology (Ocean University of China), Ministry of Education, Qingdao 266100, China. Electronic address: ygzhao@ouc.edu.cn.
³ College of Materials Science and Engineering, Ocean University of China, Qingdao 266100, China.

PMID: 35939936
DOI: 10.1016/j.marpolbul.2022.114013

Abstract

Remediation of mariculture wastewater is of great practical importance. In this study, sediment microbial fuel cells (SMFCs) were adopted and carbon felt anodes were modified to enhance COD and ammonia removal in mariculture system. The results showed that the SMFC anode with 5 % (w/w) graphene oxide (GO) coating performed best in pollutants removal and electricity generation. The maximum power density approached 132 mW/m², nearly 4.5 times higher than the unmodified anode. The removal efficiency of COD and ammonia reached 82.1 % and 95.8 % respectively, both improved compared with the control and chemical modification. The modified anode effectively enriched the electrogenic Sulfurovum and Lactobacillus and thus led to a significant improvement in the electrochemical performance of SMFC. This study demonstrates the successful application of SMFCs with GO modified anodes in the in-situ removing pollutants and SMFCs present obvious remediation potential on the contaminated mariculture inhabitant.

Keywords: Anode modification; Graphene oxide; Mariculture wastewater; Sediment microbial fuel cells; Sulfurovum.

MeSH terms

Ammonia
Bioelectric Energy Sources*
Electrodes
Environmental Pollutants*
Wastewater

Substances

Environmental Pollutants
Waste Water
Ammonia