Publication: Partial nitrification in entrapped-cell-based reactors with two different cell-to-matrix ratios: performance, microenvironment, and microbial community
1
Issued Date
2019-07-29
Resource Type
ISSN
15324117
10934529
10934529
Other identifier(s)
2-s2.0-85064611930
Rights
Mahidol University
Rights Holder(s)
SCOPUS
Bibliographic Citation
Journal of Environmental Science and Health - Part A Toxic/Hazardous Substances and Environmental Engineering. Vol.54, No.9 (2019), 874-883
Suggested Citation
Pattaraporn Kunapongkiti, Tawan Limpiyakorn, Prinpida Sonthiphand, Chaiwat Rongsayamanont Partial nitrification in entrapped-cell-based reactors with two different cell-to-matrix ratios: performance, microenvironment, and microbial community. Journal of Environmental Science and Health - Part A Toxic/Hazardous Substances and Environmental Engineering. Vol.54, No.9 (2019), 874-883. doi:10.1080/10934529.2019.1604011 Retrieved from: https://repository.li.mahidol.ac.th/handle/123456789/50910
Research Projects
Organizational Units
Authors
Journal Issue
Thesis
Title
Partial nitrification in entrapped-cell-based reactors with two different cell-to-matrix ratios: performance, microenvironment, and microbial community
Other Contributor(s)
Chulalongkorn University
Mahidol University
Prince of Songkla University
Research Network of NANOTEC-CU (RNN) on Environment
Research Program: The Development of Management System for Reduction and Control of Water Contamination and Distribution in Songkhla Lake Basin and the Western Coastline of the South of Thailand
Mahidol University
Prince of Songkla University
Research Network of NANOTEC-CU (RNN) on Environment
Research Program: The Development of Management System for Reduction and Control of Water Contamination and Distribution in Songkhla Lake Basin and the Western Coastline of the South of Thailand
Abstract
© 2019, © 2019 Taylor & Francis Group, LLC. In this study, we investigated the effect of different cell-to-matrix ratios (1% and 4%) on the partial nitrification of phosphorylated polyvinyl alcohol-entrapped-cell-based reactors and evaluated the microenvironment, microbial community, and microbial localization within the gel matrices. The results indicated that the reactor with a 1% cell-to-matrix ratio required 184 days of operation to reach partial nitrification that produced anaerobic ammonium oxidation-suitable effluent. In contrast, partial nitrification was achieved from the beginning of the operation of the reactor with the 4% cell-to-matrix ratio. The oxygen-limiting zone (dissolved oxygen = 0.5–1.5 mg L−1), where nitrite-oxidizing activity has been suggested to be suppressed and ammonia-oxidizing activity was reported to be maintained, occurred at 10–230 µm from the gel matrices surface. In addition, the layer of ammonia-oxidizing bacteria observed in this zone is likely to have played a role in obstructing oxygen penetration into the inner region of the gel matrices. The next-generation sequencing results indicated that members of the family Nitrosomonadaceae accounted for 16.4–20.7% of the relative abundance of bacteria at the family level, while members of the family Bradyrhizobiaceae, to which the genus Nitrobacter belongs, accounted for approximately 10% of the relative abundance of bacteria at the genus level in the gel matrices.