Effects of granular activated carbon on methane removal performance and methanotrophic community of a lab-scale bioreactor

Eun Hee Lee; Sun Ah Choi; Taewoo Yi; Tae Gwan Kim; Sang Don Lee; Kyung Suk Cho

doi:10.1080/10934529.2014.975541

Effects of granular activated carbon on methane removal performance and methanotrophic community of a lab-scale bioreactor

Eun Hee Lee, Sun Ah Choi, Taewoo Yi, Tae Gwan Kim, Sang Don Lee, Kyung Suk Cho

Department of Environmental Science & Engineering

Research output: Contribution to journal › Article › peer-review

3 Scopus citations

Abstract

Two identical lab-scale bioreactor systems were operated to examine the effects of granular activated carbon (GAC) on methane removal performance and methanotrophic community. Both bioreactor systems removed methane completely at a CH₄ loading rate of 71.2 g-CH₄·d^-1 for 17 days. However, the methane removal efficiency declined to 88% in the bioreactor without GAC, while the bioreactor amended with GAC showed greater methane removal efficiency of 97% at a CH₄ loading rate of 107.5 g-CH₄·d^-1. Although quantitative real-time PCR showed that methanotrophic populations were similar levels of 5-10 × 10⁸ pmoA gene copy number·VSS^-1 in both systems, GAC addition changed the methanotrophic community composition of the bioreactor systems. Microarray assay revealed that GAC enhanced the type I methanotrophic genera including Methylobacter, Methylomicrobium, and Methylomonas of the system, which suggests that GAC probably provided a favorable environment for type I methanotrophs. These results indicated that GAC is a promising support material in bioreactor systems for CH₄ mitigation.

Original language	English
Pages (from-to)	193-200
Number of pages	8
Journal	Journal of Environmental Science and Health - Part A Toxic/Hazardous Substances and Environmental Engineering
Volume	50
Issue number	2
DOIs	https://doi.org/10.1080/10934529.2014.975541
State	Published - 28 Jan 2015

Bibliographical note

Funding Information:
This research was supported by the Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Education, Science, and Technology (MEST) (R0A-2008-000-20044-0), and by the Ministry of Science, ICT and Future Planning (NRF-2012R1A2A2A03046724).

Publisher Copyright:
© 2015 Taylor & Francis Group, LLC.

Keywords

Bioreactor
granular activated carbon
methane
methanotrophs

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10.1080/10934529.2014.975541

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Lee, E. H., Choi, S. A., Yi, T., Kim, T. G., Lee, S. D., & Cho, K. S. (2015). Effects of granular activated carbon on methane removal performance and methanotrophic community of a lab-scale bioreactor. Journal of Environmental Science and Health - Part A Toxic/Hazardous Substances and Environmental Engineering, 50(2), 193-200. https://doi.org/10.1080/10934529.2014.975541

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Effects of granular activated carbon on methane removal performance and methanotrophic community of a lab-scale bioreactor. / Lee, Eun Hee; Choi, Sun Ah; Yi, Taewoo et al.
In: Journal of Environmental Science and Health - Part A Toxic/Hazardous Substances and Environmental Engineering, Vol. 50, No. 2, 28.01.2015, p. 193-200.

Research output: Contribution to journal › Article › peer-review

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N2 - Two identical lab-scale bioreactor systems were operated to examine the effects of granular activated carbon (GAC) on methane removal performance and methanotrophic community. Both bioreactor systems removed methane completely at a CH4 loading rate of 71.2 g-CH4·d-1 for 17 days. However, the methane removal efficiency declined to 88% in the bioreactor without GAC, while the bioreactor amended with GAC showed greater methane removal efficiency of 97% at a CH4 loading rate of 107.5 g-CH4·d-1. Although quantitative real-time PCR showed that methanotrophic populations were similar levels of 5-10 × 108 pmoA gene copy number·VSS-1 in both systems, GAC addition changed the methanotrophic community composition of the bioreactor systems. Microarray assay revealed that GAC enhanced the type I methanotrophic genera including Methylobacter, Methylomicrobium, and Methylomonas of the system, which suggests that GAC probably provided a favorable environment for type I methanotrophs. These results indicated that GAC is a promising support material in bioreactor systems for CH4 mitigation.

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Effects of granular activated carbon on methane removal performance and methanotrophic community of a lab-scale bioreactor

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