Nitrate removal and nitrous oxide production from upflow and downflow column woodchip bioreactors

Feyereisen, Gary W.; Spokas, Kurt A.; Strock, Jeffrey S.; Mulla, D. J.; Ranaivoson, Andry Z; Coulter, Jeffrey A.

doi:10.1002/ael2.20024

Cited by 5 publications

(3 citation statements)

References 26 publications

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“…Laboratory-based studies have demonstrated that dosing with acetate is effective at increasing NO 3 – removal rates during low-temperature and high-flow conditions. , Exogenous C dosing has also been implemented and evaluated in field-scale WBRs. ,, These studies employed constant dosing rates of methanol or acetate and confirmed that C dosing effectively increased the NO 3 – removal rates under real-world conditions. However, they also showed that C dosing can lead to biofouling of woodchip media and decreases in hydraulic efficiency , and the release of unmetabolized labile C in bioreactor effluent, contributing to biochemical oxygen demand (BOD) in receiving waters .…”

Section: Introductionmentioning

confidence: 91%

“…Laboratory-based studies have demonstrated that dosing with acetate is effective at increasing NO 3 − removal rates during low-temperature and high-flow conditions. 18,20 Exogenous C dosing has also been implemented and evaluated in field-scale WBRs. 19,21,22 These studies employed constant dosing rates of methanol or acetate and confirmed that C dosing effectively increased the NO 3 − removal rates under realworld conditions.…”

Section: ■ Introductionmentioning

confidence: 99%

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Real-Time Control of Exogenous Carbon Dosing in a Denitrifying Woodchip Bioreactor Treating Agricultural Drainage

Zhang,

Echavarria,

Sang

et al. 2024

ACS EST Eng.

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Nature-based treatment technologies such as denitrifying woodchip bioreactors (WBRs) are employed to manage nitrogen (N) pollution from agricultural nonpoint sources. Due to variability in environmental conditions like temperature and discharge, it is challenging to achieve consistent treatment effectiveness with these passive systems. To improve nitrate (NO 3 − ) load reductions in a field-scale WBR in New York State during cool spring weather, we designed a system for controlled exogenous carbon (C) dosing, allowing rates of C dosing to respond in real time to changing discharge and NO 3 − concentrations. Treatment efficiencies for NO 3 − , acetate mass balances, and other bioreactor properties were monitored from April 5 to June 10, 2023. Biostimulation with 7.5 mg C/L acetate (assuming complete mixing of injected acetate with bioreactor pore water) increased NO 3− removal rates up to 5-fold compared to a model-based scenario of baseline bioreactor performance, and were as high as 0.4 mg NO 3 − −N L −1 h −1 while water temperatures were <12 °C. Increasing acetate concentrations beyond 7.5 mg C/L did not confer a clear improvement in NO 3 − removal rates. Cumulative N load reductions increased from 11.3% under the baseline scenario without C dosing to 24.1% with C dosing. The mass ratio of metabolized C to additional N removal was 2.5:1, although the total dosed C/N mass ratio was 5.1:1 due to incomplete acetate utilization in the reactor. We found evidence that C dosing could enhance the future release of dissolved organic N (DON) and dissolved organic C related to biofilm sloughing. The expense of acetate, with a cost efficiency of 86 USD/kg N, was the main cost driver of the real-time control approach. Our results demonstrate the potential of real-time control of C dosing to meaningfully improve nonpoint source N removal during cool spring conditions but also highlight opportunities for methods to improve acetate utilization efficiencies in order to improve the overall cost-effectiveness of the approach.

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Section: Introductionmentioning

confidence: 91%

Section: ■ Introductionmentioning

confidence: 99%

Real-Time Control of Exogenous Carbon Dosing in a Denitrifying Woodchip Bioreactor Treating Agricultural Drainage

Zhang,

Echavarria,

Sang

et al. 2024

ACS EST Eng.

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“…Although bioreactors are considered a kind of ecological engineering option effective for nitrate removal, like other nature-based solutions they can have some environmental drawbacks. Occasional high DOC leaching and the presence of potentially harmful substances in the effluents and GHG emissions are among the most detrimental aspects (Grießmeier et al, 2019;Feyereisen et al, 2020).…”

Section: Potentially Harmful Substances and Ghg Emissionsmentioning

confidence: 99%

Desnitrificación de efluentes agrícolas salinos (salmueras, procedentes de desaladoras de agua de pozo, y aguas de drenaje agrícola) mediante biorreactores de madera en el SE de España

García¹

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Llegados a este punto, solo me queda dar las gracias a todas esas personas que han estado apoyándome durante toda mi vida y, especialmente durante la realización de esta tesis.En primer lugar, me gustaría dar las gracias a mis directores, Juanjo y Pepe por brindarme la oportunidad de realizar esta tesis, aunque fuera a regañadientes por mi parte. Ha sido un placer trabajar con vosotros y ver cómo dos personas aparentemente tan diferentes, son capaces de compenetrarse tan bien y hacer que las ideas surjan, una auténtica magia. No han escatimado en nada conmigo, siempre dispuestos a trabajar, ya sea en artículos o cavando. Siempre he presumido de tener estos jefes, así que es momento de plasmarlo por escrito, muchas gracias por todo.Considero que debo agradecer este trabajo no solo a las personas que he conocido o que han estado durante el proceso de la tesis, si no a los que han estado desde el principio de los tiempos. Esto ha sido como una competición de larga distancia en aguas abiertas, por lo que comenzaré por el principio.Desde el punto de salida esta mi familia, los que siempre han estado, están y estarán, pero en especial mis cuatro pilares. En la piragua, para que no me pierda en el camino, mis padres. Delante y marcando el ritmo Miriam, mi hermana mayor y, detrás empujando para que no me rinda Mario, el pequeño. Teniendo estos marcajes es difícil perderse o rendirse, con ellos es más fácil llegar a cualquier meta.Sin embargo, he dicho que esto eran aguas abiertas así que habrá que pasar por varias boyas para realizar el circuito. En la primera boya tenemos a mi familia de la piscina, allí aprendí que las cosas se consiguen con esfuerzo y sacrificio, y que los estudios son lo primero (que suerte que esa lección ya la traía aprendida de casa). Con estas pautas empecé a coger ritmo.En la segunda boya me encontré con mis amigos, los de siempre, los que conozco desde pequeña y no fallan, siempre me apoyan, aunque a veces me digan que no me han conocido sin estudiar. Con sus ánimos y su apoyo seguí progresando hacia la tercera boya.Allí, descubrí a los amigos que he hecho en la universidad, mi familia Itopera, mis estrellitas y varios diamantes que tuve la suerte de encontrar. Siempre doy las gracias por haberlos encontrado en el camino, porque, aunque la distancia nos separa, es como si el tiempo no pasara. Siempre me animan y me comprenden, pero a veces eso no es suficiente. Llegados a este punto, en el que se apreciaba el cansancio de la competición, una vez más las circunstancias marcaban que había que seguir estudiando, así que me encaminé a la cuarta boya, la llamaban "tesis", tenía pinta de que iba a ser una transición dura.De camino hacia la "tesis", me encontré con la zona de público, allí están todos los que han sufrido conmigo este doctorado, especialmente Antonio Peñalver, "porque juntos somos más fuertes" hemos pasado varios años de apoyo mutuo, dificultades, pero sobre todo risas y confidencias. Junto a él, están:

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Nitrate removal and nitrous oxide production from upflow and downflow column woodchip bioreactors

Feyereisen

Spokas

Strock

et al. 2020

Agricultural & Env Letters

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Woodchip denitrifying bioreactors (WDBR) reduce off-field tile drainage nitrogen (N) losses from agricultural fields. Limited evaluation exists regarding the influence of flow direction through WDBRs. Changing flow direction could reduce short circuiting. This study evaluated the dependency of nitrate-N removal and dissolved nitrous oxide (dN 2 O) production rates on vertical flow direction in triplicate column bioreactors at 12-h (without carbon dosing) and 2-h (with carbon dosing) hydraulic residence times. Results presented demonstrate that there was no significant difference in overall N removal rates from these column bioreactors as a function of flow direction. There was the suggestion of lower N 2 O production in the downflow direction, although this was not statistically significant due to the high variability of the N 2 O production observed in the upflow direction. Carbon addition led to bioclogging of downflow columns; future work needs to identify dosing rate, placement, and conditions that prevent biofilm formation. This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.

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Nitrate removal and nitrous oxide production from upflow and downflow column woodchip bioreactors

Cited by 5 publications

References 26 publications

Real-Time Control of Exogenous Carbon Dosing in a Denitrifying Woodchip Bioreactor Treating Agricultural Drainage

Real-Time Control of Exogenous Carbon Dosing in a Denitrifying Woodchip Bioreactor Treating Agricultural Drainage

Desnitrificación de efluentes agrícolas salinos (salmueras, procedentes de desaladoras de agua de pozo, y aguas de drenaje agrícola) mediante biorreactores de madera en el SE de España

Nitrate removal and nitrous oxide production from upflow and downflow column woodchip bioreactors

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