Related Experiment Video
Updated: Sep 13, 2025
Development of Sulfidogenic Sludge from Marine Sediments and Trichloroethylene Reduction in an Upflow Anaerobic Sludge Blanket Reactor
Published on: October 15, 2015
Enhancing microbial fuel cell-expanded granular sludge bed for treating sulfate-containing wastewater by adding
Shenglong Chen1, Yuan He2, Qiuhong Li2
1Guangxi Key Laboratory of Environmental Processes and Remediation in Ecologically Fragile Regions, Guangxi Normal University, 15 Yucai Road, Guilin 541004, PR China; University Engineering Research Center of Green Remediation and Low Carbon Development for Lijiang River Basin, Guangxi, 15 Yucai Road, Guilin 541004, PR China; Key Laboratory of Ecology of Rare and Endangered Species and Environmental Protection (Guangxi Normal University), Ministry of Education, 15 Yucai Road, Guilin 541004, PR China.
Abstract:
This study integrated a microbial fuel cell (MFC) into an expanded granular sludge bed (EGSB) reactor and incorporated biochar/hydrochar into the system to investigate the sulfate removal efficiency. Meanwhile, the potential mechanism of biochar and hydrochar on the MFC-EGSB was explored. Both the MFC-EGSB and EGSB systems had improved sulfate removal efficiency with biochar added, and their average chemical oxygen demand (COD) removal efficiencies increased to 94.7% and 84.4%, respectively. Meanwhile, the COD and sulfate removal efficiencies of the MFC-EGSB with added hydrochar increased to 94.1% and 28.8%, respectively. Hydrochar improved key enzyme activities in methanogenesis more than biochar in the MFC-EGSB. In addition, the addition of biochar and hydrochar, the relative abundance of the adenylyl sulfate reductase gene in the MFC-EGSB was 1.28 and 0.58 higher, respectively, than that in the EGSB. This work provides new insights into the mechanism of biochar and hydrochar strengthening of the MFC-EGSB system.
Related Concept Videos
00:46Bioremediation
01:30Environmental Applications of Microorganisms