Analysis of batch nitrification using substrate inhibition kinetics

Castens, Debra J.; Rozich, Alan F.

doi:10.1002/bit.260280320

Cited by 27 publications

(14 citation statements)

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“…Restraint ammonia nitrogen while feed OLR increases to 7 g/L/day was caused that no significant NH 4 -N removal was obtained in the aerobic reactor. Aerobic reactor influent N-NH3 was 620 mg/L at OLR of 10 larger than 500 mg/L that has been reported as the nitrification restraint concentration (Gasten and Rozich 1986;Gee et al 1990). So at OLR of 10 g/L/day NH 4 -N removal was decreased strongly in an aerobic system.…”

Section: Resultsmentioning

confidence: 92%

Treatability of landfill leachate by combined upflow anaerobic sludge blanket reactor and aerated lagoon

Govahi

Karimi-Jashni

Derakhshan

2011

Int. J. Environ. Sci. Technol.

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Continuous upflow anaerobic sludge blanket reactor performs more favorably at the higher organic loading rate than other anaerobic treatment. The treatment of municipal landfill leachate of Shiraz's city investigated using continuous flow anaerobic reactor and subsequently aerated lagoon. Landfill leachate has chemical oxygen demand of 45,000-90,000 mg/L and ammonia nitrogen at 1,000-2,500 and heavy metals that can impact biological treatments. Capacity of anaerobic and aerobic reactors is 10 and 20 L that operated at detention time of 2 and 4 days, respectively. Organic loading rate of upflow anaerobic sludge blanket is between 0.5-20 g chemical oxygen demand/L/day. Chemical oxygen demand removal efficiencies are between 57-87, 35-70 and 66-94% in the anaerobic, aerobic and whole system, respectively. As the entry, leachate organic loading rate increased from 1 to 20 g/L/day, the chemical oxygen demand removal efficiency reached a maximum of 71% and 84% in the anaerobic reactor and whole system, respectively, at high organic loading rate. Ammonium removal efficiency was about 54% after the aerobic stage.

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Section: Resultsmentioning

confidence: 92%

Treatability of landfill leachate by combined upflow anaerobic sludge blanket reactor and aerated lagoon

Govahi

Karimi-Jashni

Derakhshan

2011

Int. J. Environ. Sci. Technol.

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“…Las concentraciones promedios de N-NH 4 a la salida del reactor para cada una de las fases son de 3, 275 y 10 mg/L (99,7 82,0 y 99,3% de remoción estadísticamente diferentes entre si) (figura 7). Las concentraciones de la fase I y III según la literatura (Castens y Rozich, 1986;Carrera et al, 2003) no son lo suficientemente altas como no ejercerían inhibición por sustrato y según la normas de emisión chilenas serían aptas para descargar a alcantarillado (D.S. 609/1998).…”

Section: Resultados Y Discusiónunclassified

Tratamiento en Lodo Activado del Lixiviado de un Relleno Sanitario

Droppelmann

Oettinger

2009

Inf. tecnol.

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ResumenEn este trabajo se estudia el comportamiento de un lodo activado en cuanto a su capacidad para remover la demanda biológica de oxígeno (DBO) y el nitrógeno amoniacal de un lixiviado previamente tratado en una laguna anaeróbica. El lixiviado pretratado presenta concentraciones de DBO 5 y de N-NH 4 entre 1150 y 3017 mg/l y 1350 y 1750 mg/L respectivamente. La investigación se llevó a cabo en un reactor piloto de 30L, operando a tres factores de carga. Al mayor factor de carga aplicado (0,073 kg DBO 5 /kg SSV día, 0,07 kg N-NH 4 /SSV), operando con un tiempo de residencia hidráulico de 10 días, se logran altas remociones de DBO 5 (98%, 0,24 kg DBO 5 /m 3 ) y de N-NH 4 (99%, 0,15 kg N-NH 4 /m 3 día). En estas condiciones de operación, las concentraciones de DBO 5 (41 mg/L), y de N-NH 4 (10 mg/L) a la salida del lodo activado, cumplirían con holgura la norma chilena de emisión a alcantarillado. Palabras clave: lixiviado, lodo activado, relleno sanitario, amonio, demanda biológica de oxígeno Treatment of Landfill Leachate using Activated Sludge AbstractIn this work the behavior of an activated sludge is studied according to its capacity to remove the biochemical oxygen demand (BOD) and ammonium nitrogen of a leachate previously treated in an anaerobic pond. The BDO 5 and N-NH 4 concentrations in the pretreated leachate ranged from 1150 to 3017 mg/L and between 1350 to 1750 mg/L respectively. The study was carried out in a pilot scale reactor of 30L operating at three load factors. At higher load factor (0.073 kg BOD 5 /kg SSV day, 0.07 kg N-NH 4 /SSV), operating with a hydraulic residence time of 10 days, high BOD 5 (98%, 0.24 kg BOD 5 /m 3 day) and high N-NH 4 removals (99%, 0.15 kg N-NH 4 /m 3 day) were achieved. Under these operating conditions the effluent concentrations of BOD 5 (41 mg/L) and N-NH 4 (10 mg/l) complies with the official Chilean sewage emission standards.

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“…Im et al [4], Hies and Mavinic [8] and Jokela et al [7] reported that NH 4 -N removal efficiency was about higher than 90% in the aerobic stage of total system. In this research, 99.6% ammonia removal efficiency was obtained even though NH 4 -N concentration of the raw leachate were between 278 and 679 mg/l at high OLRs, which has been reported as the nitrification inhibition concentration (Gasten and Rozick [23], Gee et al [24]), since the sludge age of the aerobic reactor was adjusted to 15 days and activated sludge in the aerobic reactor was well acclimated for high COD and NH 4 -N loadings through the continuous operation of sequential reactor system.…”

Section: Nh 4 -N Removal In the Sequential Uasb/cstr Reactorsmentioning

confidence: 89%