Effects of ferrous and manganese ions on anammox process in sequencing batch biofilm reactors

Huang, Xiaoli; Gao, Dawen; Peng, Sha; Yu, Tao

doi:10.1016/s1001-0742(13)60531-8

Cited by 52 publications

(26 citation statements)

References 28 publications

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“…This could be explained by the limitation of Fe 2þ under less negative Eh conditions. Since the ions greatly affect the biosynthesis of Haem-C, an important electron carrier for energy metabolism of anammox bacteria, and a low supply in Fe 2þ substrate could reduce the growth of anammox bacterial cells (Huang et al, 2014). Anammox activity in surface layers of the BH and LZ soils was lowest or undetectable even though the 16S rRNA and hzsB genes were detected by cloning-sequencing and Q-PCR in these surface layers ( Fig.…”

Section: Linkage Between Anammox Activity Bacterial Abundance and Somentioning

confidence: 98%

Activity, abundance and community structure of anammox bacteria along depth profiles in three different paddy soils

Bai

et al. 2015

Soil Biology and Biochemistry

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a b s t r a c tAnaerobic ammonium oxidation (anammox) is a globally important nitrogen-cycling process mediated by specialized microbes, and has been demonstrated to be ubiquitous in anoxic natural settings and bioreactors. However, our knowledge of its prevalence in different paddy soil types and along the depth profiles remains largely undocumented. Here, mesocosm incubations were constructed to investigate the activity and community compositions of anammox bacteria across different depth layers of three different paddy soils. 15N tracer experiments showed that anammox rates were prevalent in almost all depth layers of an inceptisol (Binhai, BH) and an oxisol (Leizhou, LZ), but was absent in an ultisol (Taoyuan, TY). The functional gene hzsB of anammox bacteria was only detected in BH and LZ soil profiles with detected anammox activity. Anammox accounted for 0.4%e12.2% of the total N 2 production, and anammox rates were 0.02e0.77 nmol N g À1 dry soil h À1 and significantly correlated with soil pH and electric conductivity. Anammox activity and abundance of hzsB genes were significantly lower in the surface soil layers (0e5 cm) than in the sub-surface soil layers (20e60 cm). Candidatus Brocadia, Candidatus Kuenenia and Candidatus Jettenia were detected by cloning and sequencing, with Candidatus Brocadia being dominant in all the three soils and Candidatus Jettenia being more frequently detected in the LZ soil. The operational taxonomic unit number and diversity indices of anammox bacterial 16S rRNA gene increased with soil depth. Our results demonstrate that anammox is more common and active in alkaline soils than in acidic soils, in deep paddy soil layers than in surface soil layers, and that anammox activities are likely to be regulated by soil chemical properties such as pH, salinity and redox potential.

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Section: Linkage Between Anammox Activity Bacterial Abundance and Somentioning

confidence: 98%

Activity, abundance and community structure of anammox bacteria along depth profiles in three different paddy soils

Bai

et al. 2015

Soil Biology and Biochemistry

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“…Ammonia was observed to be oxidized to nitrogen in upland soils, paddy soils, intertidal wetland (Yang et al 2012b;Ding et al 2014;, nitrite in wetland soils (Shrestha et al 2009), and nitrate in anaerobic sludge via feammox (Sawayama 2006;Park et al 2009). The bacteria responsible for feammox has not been isolated so far, but researchers have identified an uncultured Acidimicrobiaceae bacterium A6 as potential because it was one of the dominate microbes in a feammox system (Huang et al 2014). Feammox are much more favored at acidic conditions than at alkaline conditions (Fig.…”

Section: Feammoxmentioning

confidence: 99%

“…4). Huang et al (2014) applied different iron sources including 6-line ferrihydrite, goethite, ferric chloride, and ferric citrate to investigate the possibilities of them to serve as electron acceptors of ammonia oxidation. They confirmed that feammox only occurred in samples amended with ferrihydrite and goethite.…”

Section: Feammoxmentioning

confidence: 99%

“…They confirmed that feammox only occurred in samples amended with ferrihydrite and goethite. The possible explanation was that the concentration of produced ferrous ion was low due to its adsorption to ferrihydrite and goethite, which might create the condition for the feasibility of feammox reaction, or feammox bacteria might only have the ability to reduce iron (oxyhydr)oxides, as is the case for some iron reducers (Huang et al 2014). Investigation by Park et al (2009), however, showed that ferric citrate drove feammox process in anaerobic sludge from a piggery wastewater.…”

Section: Feammoxmentioning

confidence: 99%

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Thermodynamic energy of anaerobic microbial redox reactions couples elemental biogeochemical cycles

2017

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Purpose The thermodynamic energy of redox reactions affects the distribution of microbial redox reactions and cyclic transformation of elements in various anaerobic ecosystems. The principle of thermodynamics is of dramatic significance in understanding the energetics of metabolic processes, the biogeochemical behavior of microorganisms, and mass and energy cycles. The purpose of this paper is to relate the distribution of the coupling reactions between C, N, Fe, and S, the most important elements involved in microbially mediated redox reactions, with their thermodynamic feasibility to provide theoretical foundation of their occurrence. Results and discussion Anaerobic microorganisms catalyze diverse redox reactions in anoxic environments, driving elemental biogeochemical cycles on the earth. They capture energy from catalyzing these redox reactions in order to support life. The thermodynamic feasibility of these microbe-driven redox reactions is controlled by their energy yields which depend on environmental conditions. Anaerobic microorganisms can oxidize organic carbon with diverse inorganic compounds including nitrate/nitrite, ferric iron, and sulfate as electron acceptors in various anoxic environments which is referred to anaerobic respiration of organic matter; reversely, inorganic carbon can be reduced to synthesize cell material with ferrous iron and sulfide as an alternative electron donor by phototrophs under different sets of circumstances. Nitrate/nitrate can be microbically reduced by inorganic compounds such as ferrous iron and sulfide under some specific situations; the coupling of anaerobic anammox oxidation and reduction of nitrite (anammox), ferric iron (feammox), and sulfate (suramox) driven by anaerobes occurs in other particular systems. Conclusions and perspectives Although there are increasing researches investigating the anaerobe-driven coupling of pairs of elements such as C-N, C-Fe, C-S, N-Fe, N-S, and Fe-S, much more intricate situations associating the coupling of multiple elements are still not comprehensively understood. A great many reactions which are thermodynamically feasible have not yet been identified in natural environments or laboratories. Further work focusing on the metabolic pathways from a genetic and enzymatic perspective and the factors controlling the feasibility of the reactions by using updated technical tools and methods is required.

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“…Esta modificación presenta algunas ventajas como bajo requerimiento de energía y no necesita fuentes de carbono adicionales. Sin embargo, las bacterias que siguen este proceso son sensibles a diversos factores como la concentración de sustrato y temperatura entre otras [57].…”

Section: Experiencias En El Tratamiento De Aguas Residuales Con Sbrunclassified

Reactores discontinuos secuenciales: Una tecnología versátil en el tratamiento de aguas residuales.

Paredes

Ramos

2014

Cien.Ing.Neogranadina

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<p>El interés en eliminar contaminantes de las aguas residuales se ha incrementado en los últimos años. Existe una constante búsqueda de nuevos y mejores diseños que permitan la implementación de sistemas de tratamiento confiables, de bajo costo y que ofrezcan mejores resultados. Esta tarea ha sido realmente un reto, debido a la generación de múltiples tipos de vertimientos líquidos, con diferentes características y composición y, en particular, al cumplimiento de estrictas y diferentes regulaciones que en los distintos países se establecen en materia de control ambiental. La investigación en el área de la ingeniería y las ciencias ambientales ha permitido el desarrollo de la tecnología de reactores discontinuos secuenciales (SBR, por sus siglas en inglés), como una variación del proceso de lodos activados convencional para la eliminación de materia orgánica y de nutrientes de las aguas residuales. El presente artículo de revisión describe la importancia de este tipo de sistemas, teniendo en cuenta las generalidades del tratamiento, la descripción técnica del sistema, los parámetros de operación más importantes, el mecanismo biológico del proceso de eliminación y las diferentes modificaciones al diseño original. Finalmente, se encontró que este tipo de sistema es de gran utilidad y ofrece muchas ventajas en la eliminación de nutrientes y materia orgánica, en comparación con los sistemas convencionales de tratamiento, además de que se puede aplicar para el tratamiento de gran cantidad y diversidad de aguas residuales tanto domésticas como industriales.</p>

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Effects of ferrous and manganese ions on anammox process in sequencing batch biofilm reactors

Cited by 52 publications

References 28 publications

Activity, abundance and community structure of anammox bacteria along depth profiles in three different paddy soils

Activity, abundance and community structure of anammox bacteria along depth profiles in three different paddy soils

Thermodynamic energy of anaerobic microbial redox reactions couples elemental biogeochemical cycles

Reactores discontinuos secuenciales: Una tecnología versátil en el tratamiento de aguas residuales.

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