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Article

Impact of Temperature on the Performance and Character of the Methanogenic Community of a Fixed-Bed Anaerobic Reactor at Psychrophilic Temperature

1
College of Agronomy, Yanbian University, Yanji 133002, China
2
College of Land and Environment, Shenyang Agricultural University, Shenyang 110866, China
3
Heilongjiang Provincial Key Laboratory of Environmental Microbiology and Recycling of Argo-Waste in Cold Region, College of Life Science and Technology, Heilongjiang August First Land Reclamation University, Daqing 163000, China
4
College of Agronomy and Biotechnology, Center of Biomass Engineering, China Agricultural University, Beijing 100193, China
*
Author to whom correspondence should be addressed.
Liu and Zhao contribute equality to this work.
Academic Editor: Constantinos V. Chrysikopoulos
Water 2021, 13(21), 3051; https://doi.org/10.3390/w13213051
Received: 20 August 2021 / Revised: 23 October 2021 / Accepted: 29 October 2021 / Published: 1 November 2021
To determine the effects of a gradual temperature decrease on reactor performance and the microbial community, four fixed-bed reactors that were packed with a biofilm carrier were operated for 217 days. The temperature of the reactors was decreased from 30 °C to 3 °C. The reactors initially soured at 3 °C and recovered when they were returned to 4 °C, as indicated by the stabilization of biogas production, methane production, VFA concentration, pH, and the COD removal rate. Our results also revealed that methanomicrobiales were the dominant methanogen, the concentration of the 16S rRNA gene in the carbon-fiber carrier sludge exceeded the same gene concentration in the deposited sludge, and that the carbon-fiber carrier played an important role in methanomicrobiale colonization at low temperatures. We suggest that 4 °C is the low-temperature threshold for optimal reactor performance. View Full-Text
Keywords: fixed-bed reactor; molasses wastewater; low-temperature anaerobic digestion; methanomicrobiale fixed-bed reactor; molasses wastewater; low-temperature anaerobic digestion; methanomicrobiale
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MDPI and ACS Style

Zhao, H.; Liu, H.; Sun, Y.; Zhang, L.; Fazl, U.; Piao, R.; Wang, W.; Cui, Z. Impact of Temperature on the Performance and Character of the Methanogenic Community of a Fixed-Bed Anaerobic Reactor at Psychrophilic Temperature. Water 2021, 13, 3051. https://doi.org/10.3390/w13213051

AMA Style

Zhao H, Liu H, Sun Y, Zhang L, Fazl U, Piao R, Wang W, Cui Z. Impact of Temperature on the Performance and Character of the Methanogenic Community of a Fixed-Bed Anaerobic Reactor at Psychrophilic Temperature. Water. 2021; 13(21):3051. https://doi.org/10.3390/w13213051

Chicago/Turabian Style

Zhao, Hongyan, Hongdou Liu, Yu Sun, Liqiang Zhang, Ullah Fazl, Renzhe Piao, Weidong Wang, and Zongjun Cui. 2021. "Impact of Temperature on the Performance and Character of the Methanogenic Community of a Fixed-Bed Anaerobic Reactor at Psychrophilic Temperature" Water 13, no. 21: 3051. https://doi.org/10.3390/w13213051

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