The temperature dependency of biological denitrification

Dawson, Robert J. G.; Murphy, Keith L.

doi:10.1016/0043-1354(72)90174-1

Cited by 162 publications

(84 citation statements)

References 11 publications

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“…Dawson and Murphy (1972) observed more than a tenfold increase in denitrification rates as temperature increased from 5°C to 27°C. Van Kessel (1977) observed a proportional increase in denitrification rates with temperature increases from 4°C to 25°C in water-sediment systems.…”

mentioning

confidence: 95%

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Temperature Coefficient for Modeling Denitrification in Surface Water Sediments Using the Mass Transfer Coefficient

Appelboom¹,

Chescheir²,

Bírgand³

et al. 2010

Transactions of the ASABE

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mentioning

confidence: 95%

“…The relationship between the denitrification rate and temperature can be fitted with an empirical exponential curve, as shown by the data from Dawson and Murphy (1972) shown in figure 1.…”

Section: Temperature Coefficient Developmentmentioning

confidence: 99%

Temperature Coefficient for Modeling Denitrification in Surface Water Sediments Using the Mass Transfer Coefficient

Appelboom¹,

Chescheir²,

Bírgand³

et al. 2010

Transactions of the ASABE

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“…La temperatura también tuvo un papel importante en la tasa de desnitrificación en los reactores anaeróbicos, el cambio de temperatura de 10 a 35°C, incidió en un aumento de la tasa de desnitrificación, de 1,5 a 3 veces (Dawson & Murphy, 1972;Bailey & Beauchamp, 1973;Stanford et al, 1975). Estos resultados coinciden con los reportado por Fontenot et al (2007) quienes observaron tasas de remoción de 100% del NO3-N cuando la temperatura del efluente fue de 22ºC.…”

Section: Nitritos Y Nitratosunclassified

Efecto de cuatro pretratamientos en la digestion anaerobica y la remocion de nutrientes de efluentes, de un sistema de recirculacion acuicola

González-Hermoso

Segovia

2017

lajar

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RESUMEN. Los sistemas de recirculación acuícola producen efluentes (fracción disuelta y fracción particulada) con altas concentraciones de nitrógeno y fósforo que son una fuente potencial de contaminación si no se tratan en forma adecuada. El tratamiento de los lodos y remoción de nutrientes por medio de la digestión anaeróbica se ha vuelto una alternativa viable para la reducción y la estabilización de los lodos provenientes de los sistemas de recirculación acuícola. El presente estudio determinó el efecto de cuatro diferentes pretratamientos (alcalino, mecánico, térmico y biológico) en la reducción de los lodos, la desnitrificación, la producción de biogás y la dinámica del nitrógeno y el fósforo proveniente de los efluentes de un cultivo de tilapia nilótica (Oreochromis niloticus, Linnaeus, 1758) en condiciones hiper-intensivas con experimentos mensuales durante un año, con duración de 15 días cada uno. Tras la aplicación de pretratamientos en los lodos de origen acuícola, se obtuvo un aumento en la liberación de nitrógeno amoniacal total con respecto al control, de igual forma se obtuvo una remoción de nitritos en todos los pretratamientos (˃90%), se incrementó la remoción de sólidos suspendidos totales, siendo mayor en los pretratamientos (˃20,3%) en comparación con el control (14,6%), así como también se incrementó la producción de biogás, siendo el pretratamiento biológico donde se obtuvo la mayor concentración (45,18 cm 3 L -1). Esto indica que la aplicación de pretratamientos en los efluentes acuícolas mejora los procesos de desnitrificación y digestión anaeróbica, pudiendo reducir los tiempos de retención hidráulica. Palabras clave: desnitrificación, digestión anaeróbica, pretratamientos, efluentes, sistema de recirculación. Effect of four different pretreatments in anaerobic digestion and nutrientremoval of effluents from a recirculating aquaculture system ABSTRACT. Intensive aquaculture recirculating systems produce effluents (dissolved and particulate solids) with concentrations of nitrogen and phosphorus, a potential source of pollution if they are not properly treated. The sludge and nutrient removal by anaerobic digestion has become an alternative for aquaculture sludge digestion and stabilization. In this study we determine the effect of four different pretreatments (alkaline, mechanical, thermal and biological) in sludge reduction and denitrification efficiency, biogas production and nitrogen and phosphorus dynamics from a hyper-intensive Nile tilapia (Oreochromis niloticus, Linnaeus, 1758) culture in 15 days experiments, one per month for one year. After application of pretreatments in aquaculture sludge, an increase in the release of total ammonia nitrogen was obtained with respect to the control, in the same way nitrate removal was obtained in all pretreatments (˃90%), The increase in total suspended solids removal was higher in pretreatment (˃20.3%) compared to control (14.6%), As well as the biogas production increase, being the biological pre-treatment where the highest concentration was ...

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“…DO inhibition on denitrification has been shown at DO concentrations of 0.20 mg· L −1 by Dawson and Murphy [23]. The DO inhibition constant K' 0 is considered variable in a wide range depending on the floc size and structure, in the range 0.02-0.2 mg· L −1 [24].…”

Section: Denitrification Efficiencymentioning

confidence: 99%

Pilot Experimentation with Complete Mixing Anoxic Reactors to Improve Sewage Denitrification in Treatment Plants in Small Communities

et al. 2013

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This paper reports the results of two sewage treatment tests in a community of 15,000 inhabitants. The sewage treatment plant is subject to strong fluctuations in load (BOD 5 , COD, TKN), and in particular in the BOD 5 /TKN ratio. These fluctuations adversely affect the biological denitrification, as demonstrated by many pilot and real-scale plants. The plants we tested were subjected to two treatment types: anoxic-aerobic and simultaneous denitrification. Both processes are designed for complete mixing conditions in the reactors in order to level the fluctuations in the load and thus improve the denitrification efficiency. The results prove that an average denitrification efficiency of up to 80% can be achieved with the sludge loading close to 0.1 kg BOD 5 (d•kgMLVSS) −1 . The effect of the sludge loading and dissolved oxygen on the denitrification efficiency is highlighted.

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The temperature dependency of biological denitrification

Cited by 162 publications

References 11 publications

Temperature Coefficient for Modeling Denitrification in Surface Water Sediments Using the Mass Transfer Coefficient

Temperature Coefficient for Modeling Denitrification in Surface Water Sediments Using the Mass Transfer Coefficient

Efecto de cuatro pretratamientos en la digestion anaerobica y la remocion de nutrientes de efluentes, de un sistema de recirculacion acuicola

Pilot Experimentation with Complete Mixing Anoxic Reactors to Improve Sewage Denitrification in Treatment Plants in Small Communities

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