Enhancing nitrate removal from wastewater by integrating heterotrophic and autotrophic denitrification coupled manganese oxidation process (IHAD-MnO): Internal carbon utilization performance

Luo, Xianxin; Peng, Chengyi; Shao, Ping; Tang, Aiping; Huang, Anping; Wu, Qi; Sun, Longhui; Yang, Liming; Shi, Hui; Luo, Xubiao

doi:10.1016/j.envres.2021.110744

Cited by 23 publications

(5 citation statements)

References 48 publications

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“…There were also many other heterotrophic/autotrophic denitrifying microorganisms, but their relative abundances differed from treatments with the continuous addition of low-concentration organic matter. The results were similar to those of a study on an integrated heterotrophic and autotrophic denitrification process for organic-limited polluted water, which showed that limited organic content could accelerate the nitrate removal rate [ 89 ].…”

Section: Resultssupporting

confidence: 85%

Pyrite-Based Autotrophic Denitrifying Microorganisms Derived from Paddy Soils: Effects of Organic Co-Substrate Addition

Yang

et al. 2022

IJERPH

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The presence of organic co-substrate in groundwater and soils is inevitable, and much remains to be learned about the roles of organic co-substrates during pyrite-based denitrification. Herein, an organic co-substrate (acetate) was added to a pyrite-based denitrification system, and the impact of the organic co-substrate on the performance and bacterial community of pyrite-based denitrification processes was evaluated. The addition of organic co-substrate at concentrations higher than 48 mg L−1 inhibited pyrite-based autotrophic denitrification, as no sulfate was produced in treatments with high organic co-substrate addition. In contrast, both competition and promotion effects on pyrite-based autotrophic denitrification occurred with organic co-substrate addition at concentrations of 24 and 48 mg L−1. The subsequent validation experiments suggested that competition had a greater influence than promotion when organic co-substrate was added, even at a low concentration. Thiobacillus, a common chemolithoautotrophic sulfur-oxidizing denitrifier, dominated the system with a relative abundance of 13.04% when pyrite served as the sole electron donor. With the addition of organic co-substrate, Pseudomonas became the dominant genus, with 60.82%, 61.34%, 70.37%, 73.44%, and 35.46% abundance at organic matter concentrations of 24, 48, 120, 240, and 480 mg L−1, respectively. These findings provide an important theoretical basis for the cultivation of pyrite-based autotrophic denitrifying microorganisms for nitrate removal in soils and groundwater.

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Section: Resultssupporting

confidence: 85%

Pyrite-Based Autotrophic Denitrifying Microorganisms Derived from Paddy Soils: Effects of Organic Co-Substrate Addition

Yang

et al. 2022

IJERPH

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“…This might be because there are manganese-oxidizing bacteria in the anaerobic sludge and they oxidised Mn 2+ to form Bio-MnOx to stimulate nitrogen removal. 7,16–18 The NH 4 + –N concentration of each treatment group increased continuously with time, first, at a fast rate and then at a slower rate, followed by a levelled period (Fig. 1b).…”

Section: Resultsmentioning

confidence: 94%

“…For example, short-chain fatty acids, waste leachate, and hydrolyzed primary sludge have been successfully applied for denitrication, maintaining a balance in waste management as well the efficient use of nitrogen removal properties. 7 Anaerobic digestion (AD) is a promising biomass energy conversion technology that has been widely used in integrated treatments of livestock manure, sewage sludge, and food waste. 8 Some scholars have developed an anaerobic simultaneous denitrication and methanogenesis process based on AD for NO 3 − -N removal without the need for additional nitrogen removal equipment or organic carbon sources.…”

Section: Introductionmentioning

confidence: 99%

Divalent manganese stimulates the removal of nitrate by anaerobic sludge

Jiang,

Huang,

Wang

et al. 2024

RSC Adv.

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“…Manganese (Mn) is a transition metal, with reserves of about 570 million tons worldwide, that can be made by aluminothermic reduction of soft manganese ore [17,18]. Manganese is easily oxidized to manganese dioxide [19]. Manganese dioxide is an excellent adsorbent material due to its large specific surface area and strong electrochemical properties [20].…”

Section: Introductionmentioning

confidence: 99%

Extended Line Defect Graphene Modified by the Adsorption of Mn Atoms and Its Properties of Adsorbing CH4

Zhang¹,

Yang²,

Zhang³

et al. 2022

Nanomaterials

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Extended line defect (ELD) graphene is a two-dimensional (2D) topologically defective graphene with alternate octagonal and quadrilateral carbon rings as basic defective units. This paper reports on the CH4 adsorption properties of ELD graphene according to the first principles of density functional theory (DFT). The effects on the CH4 adsorption of ELD graphene when modified by a single Mn atom or two Mn atoms were investigated, respectively. An ELD-42C graphene configuration consisting of 42 C atoms was first constructed. Then, the ELD-42C graphene configuration was used as a substrate, and a Mn-ELD-42C graphene configuration was obtained by modifying it with a single Mn atom. The results showed that the most stable adsorption site for Mn atoms was above the quadrilateral carbon ring. This Mn-ELD-42C graphene configuration could only stably adsorb up to 30 CH4 molecules on each side, with an average adsorption energy of −0.867 eV/CH4 and an adsorption capacity of 46.25 wt%. Three 2Mn-ELD-42C graphene configurations were then obtained by modifying the ELD-42C graphene substrate with two Mn atoms. When the two Mn atoms were located on either side of a 2Mn-ELD-42C graphene configuration and above the two octagonal carbon rings adjacent to the same quadrilateral carbon ring, it was able to adsorb up to 40 CH4 molecules on each side, with an average adsorption energy of −0.862 eV/CH4 and a CH4 adsorption capacity of 51.09 wt%.

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Enhancing nitrate removal from wastewater by integrating heterotrophic and autotrophic denitrification coupled manganese oxidation process (IHAD-MnO): Internal carbon utilization performance

Cited by 23 publications

References 48 publications

Pyrite-Based Autotrophic Denitrifying Microorganisms Derived from Paddy Soils: Effects of Organic Co-Substrate Addition

Pyrite-Based Autotrophic Denitrifying Microorganisms Derived from Paddy Soils: Effects of Organic Co-Substrate Addition

Divalent manganese stimulates the removal of nitrate by anaerobic sludge

Extended Line Defect Graphene Modified by the Adsorption of Mn Atoms and Its Properties of Adsorbing CH4

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