Synergistic effects of powdered activated carbon (PAC) during initial biofilm formation of the methanogenic consortium on polyurethane foam

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Publication Details

Author list: Hudayah, Nasrul; Suksong, Wantanasak; Kongduan, Varunee; Suraraksa, Benjaphon;

Publisher: Wiley

Publication year: 2023

Journal acronym: J. Chem. Technol. Biotechnol.

Volume number: 98

Issue number: 4

Start page: 1039

End page: 1047

Number of pages: 9

ISSN: 0268-2575

eISSN: 1097-4660

URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-85146932536&doi=10.1002%2fjctb.7311&partnerID=40&md5=486c9b94e1366eca4ab917ff71ae5615

Languages: English-Great Britain (EN-GB)

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Abstract

BACKGROUND: In the unfavorable conditions of anaerobic digestion systems, the attached or immobilized microbial communities used as biofilm are more resistant to being washed out than the suspended biomass. The biofilm formation was determined by the carrier characteristics, considering their physicochemical properties and high availability. This study presented an approach for improving the use of polyurethane (PU) foam as a biofilm carrier for methanogenic consortium. RESULTS: The effect of powdered activated carbon (PAC) on the reactor performance and biofilm formation was apparent during days 0–30. The average chemical oxygen demand (COD) removal, methane (CH4) composition, and CH4 yield of PAC-supplemented reactor (R2) in this period were 71.40%, 82.0%, and 0.3 L CH4 g−1 COD removed, respectively; these values were higher than those of the control reactor (R1). In addition, a greater amount of biomass was observed on the PU foam of R2 (1.47 g VSS), indicating a higher biofilm formation. Scanning electron microscopy (SEM) analysis revealed that microbial biofilm on the PAC-supplemented PU was also denser than that on the control PU. In addition, fluorescence in situ hybridization (FISH) detected layers of Methanosarcinales and Smithella sp. CONCLUSION: This study demonstrated that PAC supplementation had synergistic effects during initial biofilm formation of the methanogenic consortium by accelerating microbial attachment, preserving biofilm structure, and enhancing methanogenic activity. © 2023 Society of Chemical Industry (SCI). © 2023 Society of Chemical Industry (SCI).

Keywords

methanogenic consortium