Work

Optimization of CW-MFC System for Fish Wastewater Treatment by Response Surface Methodology

Year: 2024

Type: article

Abstract: Freshwater fish farming in China is conducted on a large scale with a high degree of intensification, resulting in substantial wastewater production that leads to eutrophication and ecological pollution of surrounding water bodies. This article focuses on a constructed wetland coupled with a microbial fuel cell (CW-MFC) system, utilizing a Box-Behnken design and response surface methodology to optimize operating conditions (hydraulic retention time, external resistance, and aeration rate) and removal efficacy in treating fish farming wastewater. The results indicate that the optimal operating conditions were an HRT of 3.19 days, an external resistance of 704.06 Ω, and an aeration rate of 5.30 L/min. Under these conditions, the actual removal rates for COD, NH4+-N, and TN were 95.03%, 95.22%, and 93.48%, respectively. The optimized operating conditions increased the abundance and stability of the microbial community, enhanced the relative abundance of electricity-producing and denitrifying bacteria, and improved pollutant removal efficacy.

Source: Polish Journal of Environmental Studies

DOI: 10.15244/pjoes/190655

Authors: Xinxin Yu, Yucui Shi, Shaohong You

Institutions: Guilin University of Technology, Guangxi Key Laboratory of Environmental Pollution Control Theory and Technology, Weifang University of Science and Technology

Language: English

Topic: Microbial Fuel Cells and Bioremediation

Subfield: Environmental Engineering

Field: Environmental Science

Domain: Physical Sciences

SDGs: Clean water and sanitation, Responsible consumption and production

Open Access status: diamond

Funders: National Natural Science Foundation of China, Guilin University of Technology