Sulfur-driven autotrophic denitrification of nitric oxide for efficient nitrous oxide recovery

Wu，Lan1; Wang，Li Kun2; Wei，Wei1; Song，Lan3; Ni，Bing Jie1

2021

10.1002/bit.27970

BIOTECHNOLOGY AND BIOENGINEERING   影响因子和分区

0006-3592

1097-0290

Nitrous oxide (NO) was previously deemed as a potent greenhouse gas but is actually an untapped energy source, which can accumulate during the microbial denitrification of nitric oxide (NO). Compared with the organic electron donor required in heterotrophic denitrification, elemental sulfur (S) is a promising electron donor alternative due to its cheap cost and low biomass yield in sulfur-driven autotrophic denitrification. However, no effort has been made to test NO recovery from sulfur-driven denitrification of NO so far. Therefore, in this study, batch and continuous experiments were carried out to investigate the NO removal performance and NO recovery potential via sulfur-driven NO-based denitrification under various Fe(II)EDTA-NO concentrations. Efficient energy recovery was achieved, as up to 35.5%–40.9% of NO was converted to NO under various NO concentrations. NO recovery from Fe(II)EDTA-NO could be enhanced by the low bioavailability of sulfur and the acid environment caused by sulfur oxidation. The NO reductase (NOR) and NO reductase (NOR) were inhibited distinctively at relatively low NO levels, leading to efficient NO accumulation, but were suppressed irreversibly at NO level beyond 15 mM in continuous experiments. Such results indicated that the regulation of NO at a relatively low level would benefit the system stability and NO removal capacity during long-term system operation. The continuous operation of the sulfur-driven Fe(II)EDTA-NO-based denitrification reduced the overall microbial diversity but enriched several key microbial community. Thauera, Thermomonas, and Arenimonas that are able to carry out sulfur-driven autotrophic denitrification became the dominant organisms with their relative abundance increased from 25.8% to 68.3%, collectively.

conversion efficiency elemental sulfur microbial community microbial denitrification nitric oxide nitrous oxide

SCI ; EI

英语

其他

Australian Research Council[FT160100195]

Biotechnology & Applied Microbiology

Biotechnology & Applied Microbiology

WOS:000712989500001

WILEY

20214411106671

Biochemistry ; Denitrification ; Iron compounds ; Microorganisms ; Nitrogen oxides ; Recovery ; Sulfur ; System stability

Biology:461.9 ; Biochemistry:801.2 ; Chemical Reactions:802.2 ; Chemical Products Generally:804 ; Inorganic Compounds:804.2 ; Systems Science:961

BIOLOGY & BIOCHEMISTRY

2-s2.0-85118275874

Scopus

1.Centre for Technology in Water and Wastewater,School of Civil and Environmental Engineering,University of Technology Sydney,Sydney,Australia
2.State Key Laboratory of Pollution Control and Resources Reuse,College of Environmental Science and Engineering,Tongji University,Shanghai,China
3.School of Environmental Science and Engineering,Southern University of Science and Technology,Shenzhen,China

Wu，Lan,Wang，Li Kun,Wei，Wei,et al. Sulfur-driven autotrophic denitrification of nitric oxide for efficient nitrous oxide recovery[J]. BIOTECHNOLOGY AND BIOENGINEERING,2021,119:257-267.

Wu，Lan,Wang，Li Kun,Wei，Wei,Song，Lan,&Ni，Bing Jie.(2021).Sulfur-driven autotrophic denitrification of nitric oxide for efficient nitrous oxide recovery.BIOTECHNOLOGY AND BIOENGINEERING,119,257-267.

Wu，Lan,et al."Sulfur-driven autotrophic denitrification of nitric oxide for efficient nitrous oxide recovery".BIOTECHNOLOGY AND BIOENGINEERING 119(2021):257-267.