Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5743985 | Ecological Engineering | 2017 | 8 Pages |
â¢The CW-ACMFC systems operated with different substrate concentration was compared.â¢Average bioenergy produced in CW-ACMFC increased with substrate concentration.â¢Effect of plant photosynthesis on light-dark cycle of bioenergy output was analyzed.â¢NO3-N removal efficiency was promoted in CW-ACMFC with CFF and FN electrode material.
In the study, the effects of electrode material and substrate concentration on the bioelectricity generation and wastewater treatment performances in air-cathode microbial fuel cell coupled with constructed wetland (CW-ACMFC) systems were investigated. Four materials including carbon fiber felt (CFF), stainless steel mesh (SSM), graphite rod (GR), and foamed nickel (FN) were used as air-cathode and anode for each system. The obtained maximum power densities of Systems 1, 2, 3 and 4 were 4.80, 2.30, 3.35, and 5.11Â mWÂ mâ2, respectively. In addition, a relative higher NO3-N removal efficiency was observed in four reactors, However, average COD removal percentages of Systems 1, 2, 3, and 4 were 42.30%, 37.42%, 48.78%, and 35.73%, respectively. The relative abundance of autotrophic denitrifying bacteria in the FN system was relatively higher. In summary, CFF and FN can be used as the electrode materials in the CW-ACMFCs system for wastewater treatment and bioelectricity generation simultaneously.