Nitrogen flow and microbial community in the anoxic reactor of “Sulfate Reduction, Denitrification/Anammox and Partial Nitrification” process

Kosugi, Yuka; Matsuura, Norihisa; Liang, Qiaochu; Yamamoto-Ikemoto, Ryoko

doi:10.1016/j.bej.2019.107304

Cited by 17 publications

(3 citation statements)

References 40 publications

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“…Further, the sulfate conversion was higher under organic conditions than inorganic conditions, indicating that adding the organic carbon source enhances the heterotrophic processes, such as sulfate reduction. Therefore, the metabolic function interactions between anaerobic ammonium-oxidizing bacteria and heterotrophic bacteria are substantial [ 39 ].…”

Section: Resultsmentioning

confidence: 99%

Applications of Sponge Iron and Effects of Organic Carbon Source on Sulfate-Reducing Ammonium Oxidation Process

Zhu

Shidong

Wang

et al. 2022

IJERPH

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The typical characteristics of wastewater produced from seafood, chemical, textile, and paper industries are that it contains ammonia, sulfate, and a certain amount of chemical oxygen demand (COD). The sulfate-reducing ammonium oxidation process is a biochemical reaction that allows both ammonia and sulfate removal, but its low growth rate and harsh reaction conditions limit its practical application. Due to the adsorption properties of the iron sponge and its robust structure, it provides a suitable living environment for microorganisms. To reduce the negative impact on the environment, we employed 4.8 kg of sponge iron in a 2.0 dm3 anaerobic sequencing batch reactor (ASBR). We investigated the effects of the type and concentration of carbon sources on the performance of the sulfate-reducing ammonium oxidation (SRAO) process. The results demonstrated that during a start-up period of 90 days, the average ammonium removal efficiency and the sulfate conversion efficiency of the reactor containing the sponge iron were 4.42% and 8.37% higher than those of the reactor without the sponge iron. The addition of the sponge iron shortens the start-up time of this greenhouse gas-free denitrification process and reduces future costs in practical applications. The removal of total nitrogen (TN) significantly increased after adding organic carbon sources and then declined sharply, while the most considerable reduction of ammonium removal efficiency from 98.4% to 30.5% was observed with adding phenol. The performance of the group employing glucose as the carbon source was recovered on the 28th day, with the average ammonium removal efficiency increasing from 49.03% to 83.5%. The results of this simulation study will help the rapid start-up of SRAO in the water treatment industry and can precisely guide the application of the SRAO process for wastewater containing different organic carbon sources.

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Section: Resultsmentioning

confidence: 99%

Applications of Sponge Iron and Effects of Organic Carbon Source on Sulfate-Reducing Ammonium Oxidation Process

Zhu

Shidong

Wang

et al. 2022

IJERPH

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“…Then, SO 4 2− or S 0 is formed depending on the sulfur-to-nitrogen ratio [2]. S 2− produced by sulfate-reducing bacteria can also be used as an electron donor for sulfur denitrification [19]. Due to the complex transformations of sulfur and nitrogen in anaerobic conditions, it is worth considering the effect of SO 4 2− on anaerobic NH 4 -N oxidation.…”

Section: Introductionmentioning

confidence: 99%

The Influence of Sulfate on Anaerobic Ammonium Oxidation in a Sequencing Batch Reactor

Grubba

Majtacz

2020

Water

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Anaerobic ammonia-oxidizing bacteria have a more comprehensive metabolism than expected - there may be other electron acceptors that oxidize ammonium nitrogen under anaerobic conditions, in addition to the well-known nitrite nitrogen, one of which is sulfate in the sulfammox process. Sulfate-containing compounds are part of the medium for the anammox process, but their concentrations are not particularly high (0.2 g MgSO4 ∙ 7H2O/dm3 and 0.00625 g FeSO4/dm3). They can react to some extent with influent ammonium nitrogen. In this work, tests were carried out in two sequencing batch reactors with granular sludge. The first reactor (R1) operated in a 6 hour cycle, and the concentration of the inflowing sulfate was kept at 44 mg/dm3∙d. The second reactor (R2) was operated until the 36th day in a 6 hour cycle; the influencing concentration was 180 mg SO42−/dm3∙d from the 37th to 64th day in a 3 hour cycle, with an influencing concentration of 360 mg SO42−/dm3∙d; and from the 65th to 90th day, the reactor was operated again in a 6 hour cycle with an influencing concentration of 180 mg SO42−/dm3∙d. Along with the increased share of sulfate, both the ammonium utilization rate and specific anammox activity showed an increasing trend. As soon as the sulfate dosage was reduced, the ammonium utilization rate and specific anammox activity values dropped. Therefore, it can be concluded that sulfate-containing compounds contribute to the efficiency and rate of the anammox process.

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“…For anaerobic systems, the final electron acceptor is CO2 [12], as a result of this biological process, most of the organic matter is transformed to CH4 [13]. Finally, in anoxic systems, the electron acceptor is usually nitrate, with the final result being the release of N2O or N2, depending on the behavior of the present microorganisms [14].…”

Section: Introductionmentioning

confidence: 99%

Comparison of in Batch Aerobic and Anaerobic Processes for the Degradation of Organic Matter in a Tropical Reservoir

Rodríguez-Ballesteros

Loaiza

Mesa

2020

Rev. Fac. Ing.

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The decomposition of submerged organic matter after the flooding process of a reservoir and the organic matter transported by the tributaries that supply it, gives rise to the formation of greenhouse gases (GHG), such as CO2 and CH4, product of the aerobic and anaerobic biological processes that take place both on the surface and at the bottom of the reservoir. In this study, the dynamics of aerobic and anaerobic processes as well as the generation of greenhouse gases in the degradation of organic matter, present in a tropical reservoir, were compared. Batch reactors and plant material extracted from the protection strip were used. Likewise, the behavior of the variation of the COD, physicochemical parameters such as pH, dissolved oxygen, redox potential, and conductivity were evaluated, and the kinetic constants that represent the behavior of organic matter were defined. The results showed that the degradation of the organic material leads to the generation of GHG, however, when using water plus vegetal material, the GHG increased considerably after a time. This process is due to the fact that the plant material suffers the breakdown of its polymer chains and so it degrades more quickly, which increases the concentration of organic matter available to microorganisms. GHG values were on average 10.290 g CO2eq/m2.d with water only, and 24.536 g CO2eq/m2.d with water and vegetal material for aerobic processes. In anaerobic processes, the values were on average 12.056 g CO2eq/m2.d with water only, and 33.470 g CO2eq/m2.d with water plus vegetal material. These laboratory scale results allow analyzing the behavior of the reservoir and the incidence of flooded plant material on GHGs.

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Nitrogen flow and microbial community in the anoxic reactor of “Sulfate Reduction, Denitrification/Anammox and Partial Nitrification” process

Cited by 17 publications

References 40 publications

Applications of Sponge Iron and Effects of Organic Carbon Source on Sulfate-Reducing Ammonium Oxidation Process

Applications of Sponge Iron and Effects of Organic Carbon Source on Sulfate-Reducing Ammonium Oxidation Process

The Influence of Sulfate on Anaerobic Ammonium Oxidation in a Sequencing Batch Reactor

Comparison of in Batch Aerobic and Anaerobic Processes for the Degradation of Organic Matter in a Tropical Reservoir

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