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Key function of Kouleothrix in stable formation of filamentous aerobic granular sludge at low superficial gas velocity with polymeric substrates.
Chen, Xi; Gong, Yanzhe; Li, Zhihua; Guo, Yingming; Zhang, Hongjiang; Hu, Bin; Yang, Wenhao; Cao, Yinhuan; Mu, Ruihua.
Afiliación
  • Chen X; School of Urban Planning and Municipal Engineering, Xi'an Polytechnic University, Xi'an 710048, China. Electronic address: Xi_Chen2011@126.com.
  • Gong Y; School of Urban Planning and Municipal Engineering, Xi'an Polytechnic University, Xi'an 710048, China.
  • Li Z; School of Environmental and Municipal Engineering, Xi'an University of Architecture and Technology, Xi'an 710055, China.
  • Guo Y; School of Urban Planning and Municipal Engineering, Xi'an Polytechnic University, Xi'an 710048, China.
  • Zhang H; North China Electric Power Research Institute Co., Ltd, Beijing 100045, China.
  • Hu B; School of Urban Planning and Municipal Engineering, Xi'an Polytechnic University, Xi'an 710048, China.
  • Yang W; School of Urban Planning and Municipal Engineering, Xi'an Polytechnic University, Xi'an 710048, China.
  • Cao Y; School of Urban Planning and Municipal Engineering, Xi'an Polytechnic University, Xi'an 710048, China.
  • Mu R; School of Environmental and Chemical Engineering, Xi'an Polytechnic University, Xi'an 710048, China.
Bioresour Technol ; 397: 130466, 2024 Apr.
Article en En | MEDLINE | ID: mdl-38373501
ABSTRACT
Forming and maintaining stable aerobic granular sludge (AGS) at a low superficial gas velocity (SGV) is challenging, particularly with polymeric substrates. This study cultivated filamentous aerobic granular sludge (FAGS) with filamentous Kouleothrix (Type 1851) at low SGV (0.15 cm/s) utilizing mixed acetate-soluble starch. Within approximately 260 days, notable increases in the relative abundance of Kouleothrix (from 4 % to 10 %) and Ca. Competibacter (from 1 % to 26 %) were observed through 16S rRNA gene analysis. Metagenomic analysis revealed increased expression of functional genes involved in volatile fatty acid (VFA) production (e.g., ackA and pta) and polyhydroxyalkanoate synthesis (e.g., phbB and phbC). Kouleothrix acted as a skeleton for bacterial attachment and was the key fermenting bacteria promoting granulation and maintaining granule stability. This study provides insight into the formation of FAGS with low-energy and non-VFA substrates.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Aguas del Alcantarillado / Reactores Biológicos 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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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Aguas del Alcantarillado / Reactores Biológicos Idioma: En Revista: Bioresour Technol Asunto de la revista: ENGENHARIA BIOMEDICA Año: 2024 Tipo del documento: Article Pais de publicación: Reino Unido