Thauera sp. in Hydrogen-Based Denitrification: Effects of Plentiful Bicarbonate Supplementation on Powerful Nitrite Reducer
Issued Date
2023-01-01
Resource Type
eISSN
20711050
Scopus ID
2-s2.0-85146018673
Journal Title
Sustainability (Switzerland)
Volume
15
Issue
1
Rights Holder(s)
SCOPUS
Bibliographic Citation
Sustainability (Switzerland) Vol.15 No.1 (2023)
Suggested Citation
Rujakom S., Kamei T., Kazama F. Thauera sp. in Hydrogen-Based Denitrification: Effects of Plentiful Bicarbonate Supplementation on Powerful Nitrite Reducer. Sustainability (Switzerland) Vol.15 No.1 (2023). doi:10.3390/su15010277 Retrieved from: https://repository.li.mahidol.ac.th/handle/20.500.14594/81838
Title
Thauera sp. in Hydrogen-Based Denitrification: Effects of Plentiful Bicarbonate Supplementation on Powerful Nitrite Reducer
Author(s)
Author's Affiliation
Other Contributor(s)
Abstract
Nitrite accumulation in hydrogen-based denitrification (HD) has been reported as a difficulty for achieving complete denitrification. Thauera sp. has been found as the dominant bacterial species in HD previously when using a plentiful amount of HCO3−. This present study was successful in isolating Pseudomonas sp., Dietzia sp., Pannonibacter sp., Halomonas sp., Bacillus sp., and Thauera sp. These isolated strains were selected for investigating the nitrogen removal performance under the plentiful HCO3− condition. Only Pseudomonas sp. and Thauera sp. were capable of removing NO2− where the specific NO2− removal rate of Thauera sp. (36.02 ± 5.66 mgN gVSS−1 day−1) was 9 times quicker than that of Pseudomonas sp. (3.94 ± 0.80 mgN gVSS−1 day−1). The Thauera sp. strain was then tested at different HCO3− amounts. As a result, Thauera sp. had no ability to function both NO3− and NO2− removals under HCO3− deficit condition. This study provided evidence on the role of Thauera sp. and the necessity of bicarbonate in the hydrogen-based denitrification process to enhance its efficiency and to simultaneously reduce the operational cost especially for hydrogen.