Effects of bioelectricity generation processes on methane emission and bacterial community in wetland and carbon fate analysis
(2022) In Bioresources and Bioprocessing 9(1).- Abstract
Wetlands are an important carbon sink for greenhouse gases (GHGs), and embedding microbial fuel cell (MFC) into constructed wetland (CW) has become a new technology to control methane (CH4) emission. Rhizosphere anode CW–MFC was constructed by selecting rhizome-type wetland plants with strong hypoxia tolerance, which could provide photosynthetic organics as alternative fuel. Compared with non-planted system, CH4 emission flux and power output from the planted CW–MFC increased by approximately 0.48 ± 0.02 mg/(m2·h) and 1.07 W/m3, respectively. The CH4 emission flux of the CW–MFC operated under open-circuit condition was approximately 0.46 ± 0.02 mg/(m2·h) higher than that... (More)
Wetlands are an important carbon sink for greenhouse gases (GHGs), and embedding microbial fuel cell (MFC) into constructed wetland (CW) has become a new technology to control methane (CH4) emission. Rhizosphere anode CW–MFC was constructed by selecting rhizome-type wetland plants with strong hypoxia tolerance, which could provide photosynthetic organics as alternative fuel. Compared with non-planted system, CH4 emission flux and power output from the planted CW–MFC increased by approximately 0.48 ± 0.02 mg/(m2·h) and 1.07 W/m3, respectively. The CH4 emission flux of the CW–MFC operated under open-circuit condition was approximately 0.46 ± 0.02 mg/(m2·h) higher than that under closed-circuit condition. The results indicated that plants contributed to the CH4 emission from the CW–MFC, especially under open-circuit mode conditions. The CH4 emission from the CW–MFC was proportional to external resistance, and it increased by 0.67 ± 0.01 mg/(m2·h) when the external resistance was adjusted from 100 to 1000 Ω. High throughput sequencing further showed that there was a competitive relationship between electrogenic bacteria and methanogens. The flora abundance of electrogenic bacteria was high, while methanogens mainly consisted of Methanothrix, Methanobacterium and Methanolinea. The form and content of element C were analysed from solid phase, liquid phase and gas phase. It was found that a large amount of carbon source (TC = 254.70 mg/L) was consumed mostly through microbial migration and conversion, and carbon storage and GHGs emission accounted for 60.38% and 35.80%, respectively. In conclusion, carbon transformation in the CW–MFC can be properly regulated via competition of microorganisms driven by environmental factors, which provides a new direction and idea for the control of CH4 emission from wetlands. Graphical Abstract: [Figure not available: see fulltext.].
(Less)
- author
- Liu, Shentan ; Xue, Hongpu ; Wang, Yue ; Wang, Zuo ; Feng, Xiaojuan and Pyo, Sang Hyun LU
- organization
- publishing date
- 2022-12
- type
- Contribution to journal
- publication status
- published
- subject
- keywords
- Constructed wetland, Fate pathway, Greenhouse gas, Methane, Microbial fuel cell
- in
- Bioresources and Bioprocessing
- volume
- 9
- issue
- 1
- article number
- 69
- publisher
- Springer
- external identifiers
-
- scopus:85132108444
- ISSN
- 2197-4365
- DOI
- 10.1186/s40643-022-00558-8
- language
- English
- LU publication?
- yes
- id
- d0c08fd3-2a20-4e2b-a2e5-84d458dadc57
- date added to LUP
- 2022-09-15 13:41:14
- date last changed
- 2022-09-15 13:41:14
@article{d0c08fd3-2a20-4e2b-a2e5-84d458dadc57,
abstract = {{<p>Wetlands are an important carbon sink for greenhouse gases (GHGs), and embedding microbial fuel cell (MFC) into constructed wetland (CW) has become a new technology to control methane (CH<sub>4</sub>) emission. Rhizosphere anode CW–MFC was constructed by selecting rhizome-type wetland plants with strong hypoxia tolerance, which could provide photosynthetic organics as alternative fuel. Compared with non-planted system, CH<sub>4</sub> emission flux and power output from the planted CW–MFC increased by approximately 0.48 ± 0.02 mg/(m<sup>2</sup>·h) and 1.07 W/m<sup>3</sup>, respectively. The CH<sub>4</sub> emission flux of the CW–MFC operated under open-circuit condition was approximately 0.46 ± 0.02 mg/(m<sup>2</sup>·h) higher than that under closed-circuit condition. The results indicated that plants contributed to the CH<sub>4</sub> emission from the CW–MFC, especially under open-circuit mode conditions. The CH<sub>4</sub> emission from the CW–MFC was proportional to external resistance, and it increased by 0.67 ± 0.01 mg/(m<sup>2</sup>·h) when the external resistance was adjusted from 100 to 1000 Ω. High throughput sequencing further showed that there was a competitive relationship between electrogenic bacteria and methanogens. The flora abundance of electrogenic bacteria was high, while methanogens mainly consisted of Methanothrix, Methanobacterium and Methanolinea. The form and content of element C were analysed from solid phase, liquid phase and gas phase. It was found that a large amount of carbon source (TC = 254.70 mg/L) was consumed mostly through microbial migration and conversion, and carbon storage and GHGs emission accounted for 60.38% and 35.80%, respectively. In conclusion, carbon transformation in the CW–MFC can be properly regulated via competition of microorganisms driven by environmental factors, which provides a new direction and idea for the control of CH<sub>4</sub> emission from wetlands. Graphical Abstract: [Figure not available: see fulltext.].</p>}},
author = {{Liu, Shentan and Xue, Hongpu and Wang, Yue and Wang, Zuo and Feng, Xiaojuan and Pyo, Sang Hyun}},
issn = {{2197-4365}},
keywords = {{Constructed wetland; Fate pathway; Greenhouse gas; Methane; Microbial fuel cell}},
language = {{eng}},
number = {{1}},
publisher = {{Springer}},
series = {{Bioresources and Bioprocessing}},
title = {{Effects of bioelectricity generation processes on methane emission and bacterial community in wetland and carbon fate analysis}},
url = {{http://dx.doi.org/10.1186/s40643-022-00558-8}},
doi = {{10.1186/s40643-022-00558-8}},
volume = {{9}},
year = {{2022}},
}