Activated Sludge Model No. 3

Gujer, Willi; Henze, Mogens; Mino, Toshihiro; Loosdrecht, Mark van

doi:10.2166/wst.1999.0039

Cited by 503 publications

(396 citation statements)

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“…The values of b STO and b H were taken as the same [6]. k STO was obtained by an approximate calculation [18], and the parameters such as K O 2 , f , i NBM and i NXI had recommended values from the corresponding literatures [12]. Other parameters were obtained through calibration with the software package AQUASIM [34] according to the batch experimental data.…”

Section: Determination Of Model Parameters and Simulation Methodsmentioning

confidence: 99%

“…The ASM models have been proven to be effective tools for intensive study of complex processes in the AGS technology [7][8][9][10][11]. ASM3 model [12] first incorporated the process of utilizing storage products for growth, which were first stored and then used as substrate. However, the model could not satisfactorily simulate the SBR system, where conditions of feast and famine exist alternately [13,14].…”

Section: Introductionmentioning

confidence: 99%

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Mathematical simulating the process of aerobic granular sludge treating high carbon and nitrogen concentration wastewater

Zhao

Huang

Menglong

et al. 2016

Chemical Engineering Journal

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Section: Determination Of Model Parameters and Simulation Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Mathematical simulating the process of aerobic granular sludge treating high carbon and nitrogen concentration wastewater

Zhao

Huang

Menglong

et al. 2016

Chemical Engineering Journal

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“…The presence of an electron donor (organic material) removes oxygen to the point where NO 3 -production becomes thermodynamically less favorable than N 2 production. Kinetically, nitrification has an estimated saturation constant of 0.5 mg L -1 according to the standard activated sludge model, ASM3 (Gujer et al 1999). The ASM3 model predicts that nitrifiers cannot maintain their activity at oxygen concentrations below 0.026 mg L -1 (6.3 9 10 -4 bar) under otherwise optimal conditions (i.e., in the absence of any other limiting factor).…”

Section: Thermodynamic Relationshipsmentioning

confidence: 99%

Dinitrogen and methane gas production during the anaerobic/anoxic decomposition of animal manure

Harper¹,

Weaver

Visscher³

2014

Nutr Cycl Agroecosyst

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Trace-gas emissions from animal feeding operations (AFOs) can contribute to air quality and global change gases. Previous and current estimated gas emissions from AFOs vary widely and many do not consider all forms of carbon (C) and nitrogen (N) emissions. Studies have found that as methanogenesis in the lagoons increased, conversion of ammonium (NH 4 ? ) to dinitrogen (N 2 ) also increased. The purpose of this research was to measure N 2 and CH 4 emissions from swine AFOs in three locations of the U.S. and to evaluate the possible universal relationship between lagoon methanogenesis and the conversion of NH 4 ? to N 2 gas. This relationship was tested by measuring N 2 and CH 4 emissions in two climates at 22 different farms. Methanogenesis was correlated with NH 4 ? -to-N 2 conversion by a nearconstant N 2 to CH 4 emissions ratio of 0.20, regardless of C loading and climatic effects. The process is shown to be thermodynamically favored when there is competition between NH 4? oxidizing reactions. Under methanogenic conditions (redox potentials of methanogenesis) N 2 production is favorable and nitrification/denitrification is not. Thus, N 2 production is stimulated in methanogenic conditions. Evaluation of NH 3 gas emissions from AFOs must consider other N emissions than NH 3 . Finally, a statistical model was developed to estimate methane and N 2 emissions (kg gas ha -1 ) given feed input per lagoon surface area (kg feed ha -1 ) and local air temperature. Further studies are needed to investigate the mechanisms involved in manure processing and isolate the favorable mechanisms into engineering improved manure processing.

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“…For the conventional activated sludge systems, activated sludge models (ASMs) established by the International Water Association provide a consistent framework for the description of biological processes in activated sludge processes, including carbon oxidation, nitrification, and denitrification (Gujer et al 1999;Henze et al 1987). However, for a system in the presence of uncoupler in activated sludge, ASMs are not able to appropriately describe the activated sludge.…”

Section: Introductionmentioning

confidence: 99%

Substrate consumption and excess sludge reduction of activated sludge in the presence of uncouplers: a modeling approach

Xie

Sheng

et al. 2009

Appl Microbiol Biotechnol

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A mathematical model with a consideration of energy spilling is developed to describe the activated sludge in the presence of different levels of metabolic uncouplers. The consumption of substrate and oxygen via energy spilling process is modeled with a Monod term, which is dependent on substrate and inhibitor. The sensitivity of the developed model is analyzed. Three parameters, maximum specific growth rate (μ max ), energy spilling coefficient (q max ), and sludge yield coefficient (Y H ) are estimated with experimental data of different studies. The values of μ max , q max , and Y H are found to be 6.72 day -1 , 5.52 day -1 , and 0.60 mg COD mg -1 COD for 2, 4-dinitrophenol and 7.20 day -1 , 1.58 day -1 , and 0.62 mg COD mg -1 COD for 2, 4-dichlorophenol. Substrate degradation and sludge yield could be predicted with this model. The activated sludge process in the presence of uncouplers that is described more reasonably by the new model with a consideration of energy spilling. The effects of uncouplers on substrate consumption inhibition and excess sludge reduction in activated sludge are quantified with this model.

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Activated Sludge Model No. 3

Cited by 503 publications

References 0 publications

Mathematical simulating the process of aerobic granular sludge treating high carbon and nitrogen concentration wastewater

Mathematical simulating the process of aerobic granular sludge treating high carbon and nitrogen concentration wastewater

Dinitrogen and methane gas production during the anaerobic/anoxic decomposition of animal manure

Substrate consumption and excess sludge reduction of activated sludge in the presence of uncouplers: a modeling approach

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