Effect of hydraulic retention time on microbial community in biochemical passive reactors during treatment of acid mine drainage

Vásquez, Yaneth; Escobar, María; Sáenz, Johan S.; Quiceno-Vallejo, Maria F.; Neculita, Carmen Mihaela; Arbeli, Ziv; Roldán, Fabio

doi:10.1016/j.biortech.2017.09.144

Cited by 47 publications

(12 citation statements)

References 32 publications

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“…The efficiency of the treatment does not only depend on the geometric parameters of the reactor, it is also affected by factors such as HRT and COD as well as the typology of the microbial community (Cunha et al, 2019; Lu et al, 2016; Vasquez et al, 2018). Among the microbial properties, the exogenous and/or acidophilic nature of the biological strain seems to influence the efficiency of the process.…”

Section: The Use Of Microbial Sulfate Reductionmentioning

confidence: 99%

“…At the scale of one study, factors such as the COD/SO 4 ratio and HRT may have important effects on removal yields. Concerning the HRT parameter, Vasquez et al (2018) suggested that long HRTs tend to favour the abundance of SRB while short durations rather promote other communities (acidophilic and chemo-lithotrophic). However, as mentioned above, our review showed that high removal can be achieved independently from HRT magnitude (Cf.…”

Section: The Use Of Microbial Sulfate Reductionmentioning

confidence: 99%

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Over-sulfated soils and sediments treatment: A brief discussion on performance disparities of biological and non-biological methods throughout the literature

Ahmat

Mamindy-Pajany

2021

Waste Manag Res

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High sulfate concentrations in industrial effluents as well as solid materials (excavated soils, dredged sediments, etc.) are a major hindrance for circular economy outlooks. SO42- acceptability standards are indeed increasingly restrictive, given the potential outcomes for public health and ecosystems. This literature review deals with the treatment pathways relying on precipitation, adsorption and microbial redox principles. Although satisfactory removal performances can be achieved with each of them, significant yield differences are displayed throughout the bibliography. The challenge here was to identify the parameters leading to this variability and to assess their impact. The precipitation pathway is based on the formation of two main minerals (ettringite and barite). It can lead to total sulfate removal but can also be limited by aqueous wastes chemistry. Stabilizer kinetics of formation and equilibrium are highly constrained by background properties such as pH, Eh, SO42- saturation state and inhibiting metal occurrences. Regarding the adsorption route, sorbents’ intrinsic features such as the qmax parameter govern removal yields. Concerning the microbial pathway, the chemical oxygen demand/SO42- ratio and the hydraulic retention time, which are classically evoked as yield variation factors, appear here to be weakly influential. The effect of these parameters seems to be overridden by the influence of electron donors, which constitute a first order factor of variability. A second order variability can be read according to the nature of these electron donors. Approaches using simple monomers (ethanol lactates, etc.) perform better than those using predominantly ligneous organic matter.

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Section: The Use Of Microbial Sulfate Reductionmentioning

confidence: 99%

Section: The Use Of Microbial Sulfate Reductionmentioning

confidence: 99%

Over-sulfated soils and sediments treatment: A brief discussion on performance disparities of biological and non-biological methods throughout the literature

Ahmat

Mamindy-Pajany

2021

Waste Manag Res

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“…Sin embargo, en biorreactores empacados con mezclas reactivas se ha evidenciado mayor diversidad de bacterias celulolíticas y fermentativas, capaces de degradar la materia orgánica con capacidad para donar electrones y afectar la cinética de formación de sulfuros metálicos, mientras que las BSR se encuentran en baja proporción (5 -10 %) (Hiibel et al, 2008;Rezadehbashi y Baldwin, 2018). Se ha establecido que la comunidad microbiana en los reactores pasivos está relacionada con factores como el inóculo (Pereyra et al, 2010), los substratos orgánicos (Song et al, 2012a;Song et al, 2012b;Lefticariu et al, 2015), el tiempo de operación (Aoyagi et al, 2018), pH (Aoyagi et al, 2017;Fan et al, 2019) y el tiempo de retención hidráulica (Aoyagi et al, 2017;Vásquez et al, 2018;Xu et al, 2018).…”

Section: Comunidades Microbianas Encontradas En Rbpunclassified

“…La cuantificación de los genes funcionales dsrA, cel48 y hydA por qPCR ha permitido el estudio de su dinámica bajo la influencia de diferentes factores que determinan la eficiencia de los RBP. En previos estudios con estos genes se ha demostrado cómo la composición de los substratos orgánicos (Hiibel et al, 2011), el efecto de la bioaumentación y bioestimulación (Pereyra et al, 2012), las condiciones medio ambientales y de operación (Vásquez et al, 2018) de los biorreactores pueden incrementar las comunidades microbianas, y por lo tanto el éxito para la remoción de sulfatos y metales.…”

Section: Comunidades Microbianas Encontradas En Rbpunclassified

Reactores Bioquímicos Pasivos: Una alternativa biotecnológica para la remediación de drenajes ácidos de mina

Vásquez¹,

Escobar

2020

Rev. colomb. biotecnol.

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El Drenaje ácido de mina (DAM) es actualmente el principal contaminante de las regiones mineras. Los reactores bioquímicos pasivos son una tecnología sostenible fácil de instalar que utiliza desechos agroindustriales de la región y puede operar en áreas remotas con poco mantenimiento. Además, son una tecnología limpia que involucra bioprocesos, reacciones químicas y precipitación de metales minimizando el impacto de los vertimientos ácidos sobre suelos y cuerpos de aguas. Los reactores bioquímicos pasivos son columnas empacadas con una “mezcla reactiva” conformada por materiales orgánicos, inorgánicos y un inoculo microbiano. En esta mezcla se remedia el DAM por medio de procesos fisicoquímicos como la adsorción, precipitación, coprecipitación de los metales y de la reducción del sulfato a sulfuro, mientras se incrementa el pH y la alcalinidad. Con el fin de brindar información reciente, así como las necesidades de investigación en el tema este documento presenta una revisión de literatura sobre la generación química y biológica de los DAM, así como su remedición utilizando reactores bioquímicos pasivos. El conocimiento de los conceptos básicos de estos procesos es extremadamente útil para evaluar las posibles aplicaciones, beneficios y limitaciones de estos sistemas de tratamiento utilizados por la biotecnología durante la biorremediación de efluentes mineros.

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“…Current research on passive bioreactors has focused on the study of the microbial communities involved [22,23]. Environmental factors (HRT, organic source, pH, metals, sulfates, and sulfides) have a significant impact on the composition of microbial communities, and the study of reactor microorganisms is critical for the selection of phylogenetic groups as inoculum [24].…”

Section: Introductionmentioning

confidence: 99%

Evaluation of Dispersed Alkaline Substrate and Diffusive Exchange System Technologies for the Passive Treatment of Copper Mining Acid Drainage

Schwarz

Nancucheo

Gaete

et al. 2020

Water

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The study evaluates the performance of the novel ADES (alkaline diffusive exchange System), SDES (sulfidogenic diffusive exchange system) and DAS (Dispersed Alkaline Substrate) technologies for the passive treatment of high-strength acid mine drainage (AMD) from copper mining (pH~3, 633 mg Cu L−1). The chemical DAS and ADES prototypes showed the best performance in the removal of Cu, Al, and Zn (98–100%), while the biochemical SDES reactors achieved a high sulfate removal rate (average of 0.28 mol m−3 day-1). Notably, the DES technology was effective in protecting the sulfate-reducing communities from the high toxicity of the AMD, and also in maintaining bed permeability, an aspect that was key in the ADES reactor. The DAS reactor showed the highest reactivity, accumulating the metallic precipitates in a lower reactor volume, allowing to conclude that it requires the lowest hydraulic residence time among all the reactors. However, the concentration of precipitates resulted in the formation of a hardpan, which may trigger the need of removing it to avoid compromising the continuity of the treatment process. This study suggests the development of new treatment alternatives by combining the strengths of each technology in combined or serial treatments.

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Effect of hydraulic retention time on microbial community in biochemical passive reactors during treatment of acid mine drainage

Cited by 47 publications

References 32 publications

Over-sulfated soils and sediments treatment: A brief discussion on performance disparities of biological and non-biological methods throughout the literature

Over-sulfated soils and sediments treatment: A brief discussion on performance disparities of biological and non-biological methods throughout the literature

Reactores Bioquímicos Pasivos: Una alternativa biotecnológica para la remediación de drenajes ácidos de mina

Evaluation of Dispersed Alkaline Substrate and Diffusive Exchange System Technologies for the Passive Treatment of Copper Mining Acid Drainage

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