Optimization of A constructed wetland-microbial fuel cell system for Cr(VI) removal from wastewater and power generation performance

• Autorzy: Shi, Yucui , Li, Yongwei , Liu, Qing , You, Shaohong
• Języki publikacji: EN

Abstrakty

EN

A new type of bioelectrochemical system features a constructed wetland (CW) coupled with a microbial fuel cell (MFC) to treat Cr(VI) wastewater while generating electricity. The optimal operating parameters for treating wastewater containing Cr(VI) are discussed. The results show that the CW- -MFC system is more effective in the treatment of Cr(VI)-containing wastewater and generating electricity. A COD concentration of 300 mg/dm3 corresponded to the greatest COD and Cr(VI) removal rates with a maximum power density of 505.62 mW/m³, whereas a Cr(VI) concentration of 80 mg/dm³ yielded the greatest COD removal rate, with a maximum power density of 484.43 mW/m³. A hydraulic retention time (HRT) of 3 days yielded the largest pollutant removal rates with a maximum power density of 479.21 mW/m³. Considering that the comprehensive operating conditions of CW-MFC are based on planting plants, the COD concentration is 300 mg/dm³, the Cr(VI) concentration is 80 mg/dm³, and the HRT is 3 days. The abundance of electrogenic bacteria Geobacter and metal dissimilatory reducing bacteria Acinetobacter in CW-MFC is higher than that in the control group. The results of this study provide theoretical guidance for determining the optimal operating conditions and energy recovery of the CW-MFC system for treating chromium wastewater.

Słowa kluczowe

PL

związki chromu; mikrobiologiczne ogniwa paliwowe; retencja hydrauliczna; mokradło

EN

chromium compounds; microbial fuel cells; hydraulic retention; wetland

• Czasopismo: Environment Protection Engineering
• Rocznik: 2024
• Tom: Vol. 50, nr 2
• Strony: 41--60
• Opis fizyczny: Bibliogr. 28 poz., rys., tab.

Twórcy

autor

Shi, Yucui

• School of Chemical Engineering and Environment, Weifang University of Science and Technology, Weifang 262700, China.
• Shandong Engineering Research Center of Green and High-value Marine Fine Chemical, Weifang 262700, China

autor

Li, Yongwei

• School of Chemical Engineering and Environment, Weifang University of Science and Technology, Weifang 262700, China.
• Shandong Engineering Research Center of Green and High-value Marine Fine Chemical, Weifang 262700, China

autor

Liu, Qing

• School of Chemical Engineering and Environment, Weifang University of Science and Technology, Weifang 262700, China.
• Shandong Engineering Research Center of Green and High-value Marine Fine Chemical, Weifang 262700, China

autor

You, Shaohong

• College of Environmental Science and Engineering, Guilin University of Technology, Guilin 541004, China,
• Guangxi Key Laboratory of Environmental Pollution Control Theory and Technology of Guilin University of Technology, Guilin 541004, China

Bibliografia

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Identyfikatory

DOI

10.37190/epe240203