Deciphering the influence of S/N ratio in a sulfite-driven autotrophic denitrification reactor

Xue, Mi; Nie, Yuting; Cao, Xiwei; Zhou, Xin

doi:10.1016/j.scitotenv.2022.155612

Cited by 13 publications

(4 citation statements)

References 25 publications

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“…A higher S/N value indicates a more favorable design factor setting and a system with enhanced robustness. 54 In the study concerning the quality metrics of RHA-SiO 2 , the D50 and D98 outcomes utilize the variance of the “smaller is better” quality characteristic, while SSA applies the variance of the “larger is better” quality characteristic.…”

Section: Resultsmentioning

confidence: 99%

Improving the grindability of rice husk-based green silica through pyrolysis process optimization employing the Taguchi method and response surface methodology

Yuan,

Ma,

Hou

et al. 2024

CrystEngComm

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Section: Resultsmentioning

confidence: 99%

Improving the grindability of rice husk-based green silica through pyrolysis process optimization employing the Taguchi method and response surface methodology

Yuan,

Ma,

Hou

et al. 2024

CrystEngComm

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“…In the SAD process, four common sulfur compounds, elemental sulfur (S 0 ), sulfide (S 2− ), thiosulfate (S 2 O 3 2− ), and sulfite (SO 3 2− ), can be used as electron donors. Equations (1)-(4) described the SAD with various sulfur sources (Batchelor and Lawrence, 1978;Pokorna and Zabranska, 2015;Xue et al, 2022;Yuan et al, 2022).…”

Section: Sulfur Autotrophic Denitrificationmentioning

confidence: 99%

Research progress and prospect of low-carbon biological technology for nitrate removal in wastewater treatment

Zheng,

Zhang,

Kong

et al. 2024

Front. Environ. Sci. Eng.

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Wastewater treatment plants are the major energy consumers and significant sources of greenhouse gas emissions, among which biological nitrogen removal of wastewater is an important contributor to carbon emissions. However, traditional heterotrophic denitrification still has the problems of excessive residual sludge and the requirement of external carbon sources. Consequently, the development of innovative low-carbon nitrate removal technologies is necessary. This review outlines the key roles of sulfur autotrophic denitrification and hydrogen autotrophic denitrification in low-carbon wastewater treatment. The discovered nitrate/nitrite dependent anaerobic methane oxidation enables sustainable methane emission reduction and nitrogen removal by utilizing available methane in situ. Photosynthetic microorganisms exhibited a promising potential to achieve carbon-negative nitrate removal. Specifically, the algal-bacterial symbiosis system and photogranules offer effective and prospective low-carbon options for nitrogen removal. Then, the emerging nitrate removal technology of photoelectrotrophic denitrification and the underlying photoelectron transfer mechanisms are discussed. Finally, we summarize and prospect these technologies, highlighting that solar-driven biological nitrogen removal technology is a promising area for future sustainable wastewater treatment. This review has important guiding significance for the design of low-carbon wastewater treatment systems.

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“…The joint removal of sulfur and nitrogen can help leverage the benefits of the interaction between sulfur and nitrogen cycles, where oxidized nitrogen compounds are reduced to N 2, while the reduced sulfur compounds are oxidized to sulfate (SO 4 2− ), producing a low negative impact on the environment [7,13,14].…”

Section: Introductionmentioning

confidence: 99%

“…Reductive sulfur compound is one of the most common inorganic electron donors performing autotrophic denitrification. Up until now, a variety of sulfur species, including S 2−, HS − , chemical and biogenic S 0 and S 2 O 3 2− , have been successfully applied for sulfurbased autotrophic denitrification process [14]. When S 2− is used as an electron donor to conduct denitrification, S 2− first reacts with NO 2 − , then with NO 3 − as a result, and competition for the electron acceptor of NO 2 − -N can occur during the coupling of S 2−denitrification, affecting the nitrogen removal efficiency of the reactor [15].…”

Section: Introductionmentioning

confidence: 99%

Sequential Nitrification—Autotrophic Denitrification Using Sulfur as an Electron Donor and Chilean Zeolite as Microbial Support

Barahona

Rubio

Gómez

et al. 2022

Water

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Sequential nitrification–autotrophic denitrification (SNaD) was carried out for ammonium removal in synthetic wastewater (SWW) using sulfur as an electron donor in denitrification. Four reactors were operated in batch mode, two with zeolite (1 mm size) used as microbial support and two without support, to assess the effect of the zeolite addition in the SNaD. Aeration, anoxic, and anaerobic cycles were established, where 96% removal of NH4+-N (oxidized to nitrite or nitrate) was achieved in nitrification, along with 93% removal of NO3−-N in denitrification for the SNaD with zeolite. It was observed that the use of zeolite assists in buffering reactor load changes. Inhibition caused by nitrite accumulation in the denitrification stage was minimized by increasing the nitrogen concentration in the SWW. The results obtained in this study are the basis for the development of ammonium removal by simultaneous nitrification–autotrophic denitrification using a single reactor.

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Deciphering the influence of S/N ratio in a sulfite-driven autotrophic denitrification reactor

Cited by 13 publications

References 25 publications

Improving the grindability of rice husk-based green silica through pyrolysis process optimization employing the Taguchi method and response surface methodology

Improving the grindability of rice husk-based green silica through pyrolysis process optimization employing the Taguchi method and response surface methodology

Research progress and prospect of low-carbon biological technology for nitrate removal in wastewater treatment

Sequential Nitrification—Autotrophic Denitrification Using Sulfur as an Electron Donor and Chilean Zeolite as Microbial Support

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