Nitrous oxide emissions from biofilm processes for wastewater treatment

Sabba, Fabrizio; Terada, Akihiko; Wells, George F.; Smets, Barth F.; Nerenberg, Robert

doi:10.1007/s00253-018-9332-7

Cited by 82 publications

(54 citation statements)

References 169 publications

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“…N 2 O is a denitrification intermediate that can accumulate in denitrifying biofilm systems (Liu et al, , ; Sabba et al, ; Sabba, Terada, Wells, Smets, & Nerenberg, ). N 2 O emissions were observed in previous studies when NO 3 − was removed by sulfur/limestone packed blocks (Hasegawa, Shimizu, & Hanaki, ).…”

Section: Discussionmentioning

confidence: 99%

Using kinetics and modeling to predict denitrification fluxes in elemental‐sulfur‐based biofilms

Wang

Sabba

Bott

et al. 2019

Biotech & Bioengineering

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Elemental sulfur (S 0 ) can serve as an electron donor for water and wastewater denitrification, but few researchers have addressed the kinetics of S 0 -based reduction of nitrate (NO 3 − ), nitrite (NO 2 − ), and nitrous oxide (N 2 O). In addition, S 0based denitrifying biofilms are counter-diffusional. This is because the electron donor (S 0 ) is supplied from the biofilm attachment surface while the acceptor, for example, NO 3 − , is supplied from the bulk liquid. No existing mathematical model for S 0 -based denitrification considers this behavior. In this study, batch tests were used to determine the kinetic parameters for the reduction of NO 3 − , NO 2 − , and N 2 O.Additionally, a biofilm model was developed to explore the effects of counterdiffusion on overall fluxes, that is, the mass of NO 3 − or NO 2 − removed per unit biofilm support area per unit time. The maximum specific substrate utilization rates (q) for NO 3 − , NO 2 − , and N 2 O were 3.54, 1.98, and 6.28 g N g COD −1 ·d −1 , respectively. The maximum specific growth rates (μ) were 0.71, 1.21, and 1.67 d −1 for NO 3 − to NO 2 − , NO 2 − to N 2 O, and N 2 O to N 2 , respectively. Results suggest that the observed NO 2 − accumulation during S 0 -based denitrification results from a lowq for NO 2 − relative to that for NO 3 − . The highq for N 2 O, relative to that for NO 3 − and NO 2 − , suggest that little N 2 O accumulation occurs during denitrification. A counter-diffusional biofilm model was used to predict trends for NO 3 − fluxes, and confirmed NO 2 − accumulation in S 0 -based denitrification biofilms. It also explains the observed detrimental effects of biofilm thickness on denitrification fluxes. This study allows a more accurate prediction of NO 3 − , NO 2 − , and N 2 O transformations in S 0 -based denitrification.

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Section: Discussionmentioning

confidence: 99%

Using kinetics and modeling to predict denitrification fluxes in elemental‐sulfur‐based biofilms

Wang

Sabba

Bott

et al. 2019

Biotech & Bioengineering

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“…interactions, substrate gradients and interaction allowing for biotic and abiotic formation of N2O (Sabba et al, 2018). The results of Cecconet et al (2019a) and Nguyen et al (2016a) suggest that the insertion of electrodes in a porous medium, even though feasible and simple, presents some 177 limitations that could be corrected and eliminated with a more dedicated design ( Figure 2D This BES showed an average degradation rate of 59 ± 3 mg L -1 d -1 when inoculated with refinery wastewater; lower performances, i.e.…”

Section: In Situ Bioelectroremediation: the Quest For The Ideal Setupmentioning

confidence: 96%

<em>In situ</em> Groundwater Treatment with Bioelectrochemical Systems (BES): Critical Review and Future Perspectives

Cecconet¹,

Sabba²,

Devecseri³

et al. 2019

Preprint

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Groundwater contamination is an ever-growing environmental issue, that has attracted much and undiminished attention for the past half century. Groundwater contamination originates from anthropogenic (e.g. hydrocarbons), natural compounds (e.g. nitrate and arsenic), or both; to tackle these contaminants different technologies have been tested during the years. Recently, bioelectrochemical systems (BESs) have emerged as a potential treatment for groundwater contamination, with in situ applications reported, that showed promising results. Nitrate and hydrocarbons (toluene, phenanthrene, benzene, BTEX and light PAHs) have been successfully removed, due to the interaction of microbial metabolism with poised electrodes, other than physical migration due to the electric field generated in BES. The selection of proper BESs relies on several factors and problems such as complexity of the groundwater, scale-up and energy requirements that need to be taken into account. Modelling efforts could help predict case scenarios and choose an ideal design and approach to solve these issues. In this review, we critically analyze in situ BES applications for groundwater remediation, focusing in particular on the different setups proposed, and we identify and discuss the existing research gaps in the field.

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“…Atmospheric N 2 and Vienna Standard Mean Ocean Water (VSMOW) are the references used for the nitrogen and oxygen isotopes ratios, respectively, expressed in conventional δ notation, in per mil (‰). Nitrogen and oxygen isotope ratios of nitrate and nitrite were determined separately following a modified protocol of McIlvin and Altabet (McIlvin and Altabet, 2005;Semaoune et al, 2012). Nitrogen isotope ratios of ammonium were determined following the protocol of Zhang et al (2007).…”

Section: Stable Isotope Measurementsmentioning

confidence: 99%

Isotopic evidence for alteration of nitrous oxide emissions and producing pathways' contribution under nitrifying conditions

et al. 2020

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Abstract. Nitrous oxide (N2O) emissions from a nitrifying biofilm reactor were investigated with N2O isotopocules. The nitrogen isotopomer site preference of N2O (15N-SP) indicated the contribution of producing and consuming pathways in response to changes in oxygenation level (from 0 % to 21 % O2 in the gas mix), temperature (from 13.5 to 22.3 ∘C) and ammonium concentrations (from 6.2 to 62.1 mg N L−1). Nitrite reduction, either nitrifier denitrification or heterotrophic denitrification, was the main N2O-producing pathway under the tested conditions. Difference between oxidative and reductive rates of nitrite consumption was discussed in relation to NO2- concentrations and N2O emissions. Hence, nitrite oxidation rates seem to decrease as compared to ammonium oxidation rates at temperatures above 20 ∘C and under oxygen-depleted atmosphere, increasing N2O production by the nitrite reduction pathway. Below 20 ∘C, a difference in temperature sensitivity between hydroxylamine and ammonium oxidation rates is most likely responsible for an increase in N2O production via the hydroxylamine oxidation pathway (nitrification). A negative correlation between the reaction kinetics and the apparent isotope fractionation was additionally shown from the variations of δ15N and δ18O values of N2O produced from ammonium. The approach and results obtained here, for a nitrifying biofilm reactor under variable environmental conditions, should allow for application and extrapolation of N2O emissions from other systems such as lakes, soils and sediments.

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Nitrous oxide emissions from biofilm processes for wastewater treatment

Cited by 82 publications

References 169 publications

Using kinetics and modeling to predict denitrification fluxes in elemental‐sulfur‐based biofilms

Using kinetics and modeling to predict denitrification fluxes in elemental‐sulfur‐based biofilms

<em>In situ</em> Groundwater Treatment with Bioelectrochemical Systems (BES): Critical Review and Future Perspectives

Isotopic evidence for alteration of nitrous oxide emissions and producing pathways' contribution under nitrifying conditions

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