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Self-Aerated Osmotic Microbial Fuel Cell System Based on Siphon Principle: Performance Investigation and Application Significance
https://orcid.org/0000-0002-4549-9824
https://orcid.org/0000-0001-8824-7734
https://orcid.org/0009-0009-0753-5159
The osmotic microbial fuel cell (OsMFC) enables wastewater treatment, electricity generation and clean water generation at the same time. The cathode of OsMFC requires oxygen as a terminal electron acceptor for the redox reaction in the reactor to proceed smoothly. However, aeration, as one of the main energy consumptions during operation, can reduce the economic viability of the reactor. This study constructed an OsMFC system with siphon-driven aeration and investigated whether this intermittent aeration mode has negative effects on OsMFC. The COD removal rate of self-aerated OsMFC was 85.74 ± 2.42%, and the average water flux was 1.80 ± 0.10 L·m–2·h–1. Although in terms of COD removal rate, maximum output potential and water production, artificially aerated OsMFC had certain advantages. Self-aerated OsMFC had a lower reverse solute flux, less water loss and more durable electrical energy output. The performance of self-aerated OsMFC for proton and electron utilization was acceptable. In addition, the membrane impedance of self-aerated OsMFC was less than 5 Ω/cm2, which was half of the membrane resistance of the artificially aerated OsMFC. Most importantly, the laboratory operation of the self-aerated system can save 0.0329 $/L wastewater under the premise that the total amount of electricity produced is similar.
A low energy consumption and high efficiency aeration mode for wastewater treatment.
Self-Aerated Osmotic Microbial Fuel Cell System Based on Siphon Principle: Performance Investigation and Application Significance
https://orcid.org/0000-0002-4549-9824
https://orcid.org/0000-0001-8824-7734
https://orcid.org/0009-0009-0753-5159
The osmotic microbial fuel cell (OsMFC) enables wastewater treatment, electricity generation and clean water generation at the same time. The cathode of OsMFC requires oxygen as a terminal electron acceptor for the redox reaction in the reactor to proceed smoothly. However, aeration, as one of the main energy consumptions during operation, can reduce the economic viability of the reactor. This study constructed an OsMFC system with siphon-driven aeration and investigated whether this intermittent aeration mode has negative effects on OsMFC. The COD removal rate of self-aerated OsMFC was 85.74 ± 2.42%, and the average water flux was 1.80 ± 0.10 L·m–2·h–1. Although in terms of COD removal rate, maximum output potential and water production, artificially aerated OsMFC had certain advantages. Self-aerated OsMFC had a lower reverse solute flux, less water loss and more durable electrical energy output. The performance of self-aerated OsMFC for proton and electron utilization was acceptable. In addition, the membrane impedance of self-aerated OsMFC was less than 5 Ω/cm2, which was half of the membrane resistance of the artificially aerated OsMFC. Most importantly, the laboratory operation of the self-aerated system can save 0.0329 $/L wastewater under the premise that the total amount of electricity produced is similar.
A low energy consumption and high efficiency aeration mode for wastewater treatment.
Self-Aerated Osmotic Microbial Fuel Cell System Based on Siphon Principle: Performance Investigation and Application Significance
https://orcid.org/0000-0002-4549-9824
https://orcid.org/0000-0001-8824-7734
https://orcid.org/0009-0009-0753-5159
The osmotic microbial fuel cell (OsMFC) enables wastewater treatment, electricity generation and clean water generation at the same time. The cathode of OsMFC requires oxygen as a terminal electron acceptor for the redox reaction in the reactor to proceed smoothly. However, aeration, as one of the main energy consumptions during operation, can reduce the economic viability of the reactor. This study constructed an OsMFC system with siphon-driven aeration and investigated whether this intermittent aeration mode has negative effects on OsMFC. The COD removal rate of self-aerated OsMFC was 85.74 ± 2.42%, and the average water flux was 1.80 ± 0.10 L·m–2·h–1. Although in terms of COD removal rate, maximum output potential and water production, artificially aerated OsMFC had certain advantages. Self-aerated OsMFC had a lower reverse solute flux, less water loss and more durable electrical energy output. The performance of self-aerated OsMFC for proton and electron utilization was acceptable. In addition, the membrane impedance of self-aerated OsMFC was less than 5 Ω/cm2, which was half of the membrane resistance of the artificially aerated OsMFC. Most importantly, the laboratory operation of the self-aerated system can save 0.0329 $/L wastewater under the premise that the total amount of electricity produced is similar.
A low energy consumption and high efficiency aeration mode for wastewater treatment.
Self-Aerated Osmotic Microbial Fuel Cell System Based on Siphon Principle: Performance Investigation and Application Significance
Li, Shilong (author) / Duan, Liang (author) / Zhang, Hengliang (author) / Li, Mingyue (author) / Jia, Yanyan (author) / Gao, Qiusheng (author) / Zhao, Yang (author) / Yu, Huibin (author) / Ya, Tao (author) / Zhang, Juanjuan (author)
ACS ES&T Water ; 4 ; 3265-3273
2024-08-09
Article (Journal)
Electronic Resource
English
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