Remediation of Mariculture Sediment by Sediment Microbial Fuel Cell

Abstract

To investigate the removal effect of pollutants in mariculture sediment by sediment microbial fuel cell (SMFC) and its power generation capacity, the effects of external resistance, cathode pH and cathode dissolved oxygen concentration (DO) on the SMFC system were investigated. The results showed that the optimal parameters for SMFC were as follows: external resistance = 1500 Ω, pH = 8.5 and DO = 5 mg·L⁻¹. In these situations, the power generation performance and organic degradation effect were both the best. The maximum output voltages were 585, 606, and 587 mV, respectively; the removal rates of COD in sediment were 75.51%, 84.21% and 86.63%, respectively; and the removal rates of ammonia nitrogen in sediment were 80.34%, 98.91% and 90.24%, respectively. The SMFC system had a certain degradation ability to pollutants such as COD and ammonia nitrogen in the sediment of the marine aquaculture areas, which had a broad application prospect.

Key findings

• ▸The results showed that the optimal parameters for SMFC were as follows: external resistance = 1500 Ω, pH = 8.
• ▸5 and DO = 5 mg·L⁻¹.
• ▸51%, 84.
• ▸21% and 86.
• ▸63%, respectively; and the removal rates of ammonia nitrogen in sediment were 80.

Keywords

Identifiers

DOI

10.1051/e3sconf/202126104037

Journal

E3S Web of Conferences

Year

2020