Performance of sulfur-based autotrophic denitrification and denitrifiers for wastewater treatment under acidic conditions

Huang, Shan; Zheng, Zhaoming; Wei, Qingqing; Han, Il Ki; Jaffé, Peter R.

doi:10.1016/j.biortech.2019.122176

Cited by 61 publications

(9 citation statements)

References 44 publications

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“…67 The more nirK and nosZ genes demonstrated that the increased relative abundance of denitrifiers could utilize exogenous electrons to accelerate nitrate reduction. 68,69 The nosZ genes expression demonstrated a high relation with N 2 emissions, 70,71 which was consistent with our N 2 O results (Figure 1B).…”

Section: Resultssupporting

confidence: 91%

Photic Biofilms Mediated Distant Nitrate Reduction at the Soil–Water Interface of Paddy Fields

Zhu

Zhang

Yang

et al. 2021

ACS Earth Space Chem.

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Photic biofilms widely exist on the surface of paddy soil and play a key role in nutrient transformation and accumulation in the soil−water interface. However, whether and how photic biofilms affect nitrogen cycles in the subsoil remained unclear. This study investigated the processes and mechanisms of nitrate reduction in waterlogged paddy soil in the presence (treatment) or absence (control) of photic biofilms. The observed nitrate reduction rate constant (k obs ) in the treatment soil increased 1.7 times compared with control. This accelerated k obs was attributed to the synergistic effect between poorly crystalline Fe minerals and autotrophic denitrifiers in soil, which was highly related to the presence of the photic biofilms. Photic biofilms aggravating daily redox oscillations at the soil−water interface promoted the formation of poorly crystalline Fe minerals available for microorganisms. Thus, photic biofilms increased the relative abundance of electroactive bacteria (Sphingomonadaceae and Xanthobacteraceae), iron reduction bacteria (Geobacter and Ignavibacterium), and denitrifiers (Rhodanobacteraceae and Burkholderiaceae) with higher copy numbers of nirK, nirS, and nosZ genes, thereby accelerating the nitrate reduction. Additionally, poorly crystalline Fe minerals contributed to improving interfacial electron transfer ability, which improved the activity of denitrifiers. These results suggested that the photic biofilms bioelectrochemically mediated the nitrate reduction in the waterlogged paddy soil.

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Section: Resultssupporting

confidence: 91%

Photic Biofilms Mediated Distant Nitrate Reduction at the Soil–Water Interface of Paddy Fields

Zhu

Zhang

Yang

et al. 2021

ACS Earth Space Chem.

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“…On the contrary, Thauera , the most dominant microbe in both control and experimental samples (Figure 4b), is a typical denitrification microorganism and has been detected in sulfur‐driven autotrophic denitrification system previously (Zhang, Zhang, Hu, Liu, & Qu, 2015). Thermomonas and Arenimonas , two genera becoming dominant significantly after the cultivation with sulfur, have been proved to be able to carry out autotrophic denitrification and detected in the simultaneous desulfurization and denitrification system earlier (Huang et al, 2019; Xing et al, 2016, 2020; Zeng et al, 2018). Therefore, the organisms with ability of autotrophic denitrification from the microbes, such as Thauera , Thermomonas , and Arenimonas , might be the key biocatalysts for the system to maintain certain NO removal efficiency and microbial activities at Phases 3 and 4.…”

Section: Resultsmentioning

confidence: 99%

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

Wang

Wei

et al. 2021

Biotech & Bioengineering

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Nitrous oxide (N2O) 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 (S0) 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 N2O 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 N2O 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 N2O under various NO concentrations. N2O 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 N2O reductase (N2OR) were inhibited distinctively at relatively low NO levels, leading to efficient N2O 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.

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“…Stoichiometry of autotrophic denitrification (Huang et al . 2019)

{normalS}_{2} {normalO}_{3}^{‐} + 2.67 {NO}_{2}^{‐} + 0.67 {normalH}^{+} \to 1.87 {SO}_{2}^{‐} + 2.67 {normalN}_{2} + 0.33 {normalH}_{2} O (Δ G^{0^{'}} = ‐ 1138.8 {KJ mol}^{‐ 1})

…”

Section: Biological Denitrification In Aquaculture – Processes Organi...mentioning

confidence: 99%

Nitrification and denitrification in recirculating aquaculture systems: the processes and players

Preena

Kumar

Singh

2021

Reviews in Aquaculture

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One of the major challenges in any sustainable aquaculture production systems is the accumulation of nitrogenous waste such as ammonia and its biological nitrification products viz nitrite and nitrate. Considering the bio-security issues, amelioration of these wastes without water exchange can be accomplished only by way of establishing in situ nitrification and denitrification through biofilters/ bioreactors activated with nitrifying/denitrifying bioaugmentors. In such systems, coexistence of aerobic denitrifiers, anaerobic ammonia oxidizers (Anammox) and complete ammonia oxidizers (Comammox) together with the autotrophic nitrifiers enhance the coupled nitrification-denitrification. This promotes total nitrogen removal without external carbon supplements or additional anerobic compartment in the system. Various recirculating aquaculture systems (RAS) comprise diverse nitrifying community in biofilters/bioreactors thereby imparting distinctive nitrogen conversion in the system. Meanwhile, the structure and population dynamics of the nitrifying/denitrifying consortia are influenced by the environmental factors forming the decisive factors of the success of the processes. Accordingly, understanding the complexity of nitrifying/denitrifying community composition turns out to be a requirement to facilitate its improvised performance. In this context, the review addresses different biological nitrogen removal systems, significance of nitrification-denitrification in RAS, genetic diversity of the key players in RAS, methods of analysis of their community structure, current application and prospects of the processes in RAS.

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Performance of sulfur-based autotrophic denitrification and denitrifiers for wastewater treatment under acidic conditions

Cited by 61 publications

References 44 publications

Photic Biofilms Mediated Distant Nitrate Reduction at the Soil–Water Interface of Paddy Fields

Photic Biofilms Mediated Distant Nitrate Reduction at the Soil–Water Interface of Paddy Fields

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

Nitrification and denitrification in recirculating aquaculture systems: the processes and players

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