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A cyclic shift-temperature operation method to train microbial communities of mesophilic anaerobic digestion.
Wang, Ming; Li, Yunting; Peng, Hao; Liu, Kai; Wang, Xiangjing; Xiang, Wensheng.
Afiliación
  • Wang M; College of Engineering, Northeast Agricultural University, No. 600 Changjiang Street, Xiangfang District, Harbin 150030, PR China; Key Laboratory of Swine Facilities Engineering, Ministry of Agriculture and Rural Affairs, Harbin 150030, PR China. Electronic address: mwang2016@163.com.
  • Li Y; College of Engineering, Northeast Agricultural University, No. 600 Changjiang Street, Xiangfang District, Harbin 150030, PR China.
  • Peng H; College of Engineering, Northeast Agricultural University, No. 600 Changjiang Street, Xiangfang District, Harbin 150030, PR China.
  • Liu K; College of Engineering, Northeast Agricultural University, No. 600 Changjiang Street, Xiangfang District, Harbin 150030, PR China.
  • Wang X; College of Plant Protection, Northeast Agricultural University, No. 600 Changjiang Street, Xiangfang District, Harbin 150030, PR China.
  • Xiang W; College of Plant Protection, Northeast Agricultural University, No. 600 Changjiang Street, Xiangfang District, Harbin 150030, PR China. Electronic address: xiangwensheng@neau.edu.cn.
Bioresour Technol ; 412: 131410, 2024 Nov.
Article en En | MEDLINE | ID: mdl-39226940
ABSTRACT
Temperature is the critical factor affecting the efficiency and cost of anaerobic digestion (AD). The current work develops a shift-temperature AD (STAD) between 35 °C and 55 °C, intending to optimise microbial community and promote substrate conversion. The experimental results showed that severe inhibition of biogas production occurred when the temperature was firstly increased stepwise from 35 °C to 50 °C, whereas no inhibition was observed at the second warming cycle. When the organic load rate was increased to 6.37 g VS/L/d, the biogas yield of the STAD reached about 400 mL/g VS, nearly double that of the constant-temperature AD (CTAD). STAD promoted the proliferation of Methanosarcina (up to 57.32 %), while severely suppressed hydrogenophilic methanogens. However, when the temperature was shifted to 35 °C, most suppressed species recovered quickly and the excess propionic acid was quickly consumed. Metagenomic analysis showed that STAD also promoted gene enrichment related to pathways metabolism, membrane functions, and methyl-based methanogenesis.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Temperatura / Biocombustibles Idioma: En Revista: Bioresour Technol Asunto de la revista: ENGENHARIA BIOMEDICA Año: 2024 Tipo del documento: Article Pais de publicación: Reino Unido
Texto completo
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XML
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Temperatura / Biocombustibles Idioma: En Revista: Bioresour Technol Asunto de la revista: ENGENHARIA BIOMEDICA Año: 2024 Tipo del documento: Article Pais de publicación: Reino Unido