Activated Sludge Models ASM1, ASM2, ASM2d and ASM3

Henze, Mogens; Gujer, Willi; Mino, Takashi; Loosdrecht, Mark C.M. van

doi:10.2166/9781780402369

Cited by 795 publications

(1,006 citation statements)

References 1 publication

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“…The physical sub-model describes the key processes occurring during membrane physical separation, including membrane fouling (involving 6 model factors and 2 state variables). Regarding, the biological sub-models they are based both on the ASM2d and they include the SMP formation/degradation processes (Jiang et al 2008;Henze et al 2000). Furthermore, both models take into account CO 2 as state variable according to the continuity-based model interface as proposed by Vanrolleghem et al (2005).…”

Section: Mathematical Models Descriptionmentioning

confidence: 99%

Comparison of Two Mathematical Models for Greenhouse Gas Emission from Membrane Bioreactors

Mannina

Cosenza

2017

Lecture Notes in Civil Engineering

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Abstract. In this study two mathematical models (Model I and Model II), able to predict the nitrous oxide (N 2 O) and carbon dioxide (CO 2 ) emission from an University Cape Town (UCT) -membrane bioreactor (MBR) plant, have been compared. Model I considers the N 2 O production only during the denitrification. Model II takes into account the two ammonia-oxidizing bacteria (AOB) formation pathways for N 2 O. Both models were calibrated adopting real data. Results highlight that Model II had a better capability of reproducing the measured data especially in terms of N 2 O model outputs. Indeed, the average efficiency related to the N 2 O model outputs was equal to 0.3 and 0.38 for Model I and Model II respectively.

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Section: Mathematical Models Descriptionmentioning

confidence: 99%

Comparison of Two Mathematical Models for Greenhouse Gas Emission from Membrane Bioreactors

Mannina

Cosenza

2017

Lecture Notes in Civil Engineering

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“…The model is a simplified scheme of ASM2 (Activeted sludge model 2) [11,12], which supplemented by the microalgae description that is similar to [13]. Succinct description of the processes allows using model as a basis for an automatic control system.…”

Section: Model Of Growth Of Microalgaementioning

confidence: 99%

Mathematical Modelling of Phosphorus Accumulation in Photo-Biological Treatment Plants of a Biosphere-Compatible City

Buzalo¹,

Ermachenko²,

Bulgakov³

et al. 2015

Proceedings of the International Symposium on Automation and Robotics in Construction (IAARC)

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We develop the idea of creating wastewater treatment facilities for biosphere compatible buildings with maximum-closed cycles with respect to water and energy. The idea started from experiments with closed-loop ecological Life Support Systems for space flights carried out in the 60s-80s last century. Water recycling is accomplished by functioning the microalgae-bacteria human ecosystem. One of the problems for systems of this type is high energy-consumption. However, besides water purification from nutrients, that organization of the purification process has multiple advantages, such as carbon dioxide recycling, wastewater disinfection, etc. One of the major benefits is the opportunity to get third-generation biofuels from algae. The closure of the system with respect to energy is performed by biofuel combustion. Thus, there is an objective to cultivate such an amount of biomass, which allows producing enough volume of biofuel. In projects, which have been presented on the exhibitions recently, for that goal phosphoruscontaining reagents are used. However, nowadays, depletion of phosphorus deposits is one of the most serious problems threatening food security, since its variously estimated deposits are enough only for a period of 30-80 years. One solution to this problem is to create a phosphorus closed-loop cycle system. We present the mathematical model describing the dynamics of phosphorus accumulation in the partially closed-loop biological system. The model can be used as a basis for the automatic control system of the photo-biological treatment plants to ensure energy independence of a residential building.

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“…Two biokinetic model formulations are implemented in the HY-DRUS Wetland Module: CW2D (Langergraber and Šimůnek, 2005) that describes aerobic and anoxic processes and is mostly used for simulating VF wetlands and CWM1 (Langergraber et al, 2009a) that additionally describes anaerobic processes and is also applicable for HF wetlands. Their mathematical formulation is based on the IWA Activated Sludge Models (Henze et al, 2000).…”

Section: Introductionmentioning

confidence: 99%

Simulating vertical flow wetlands using filter media with different grain sizes with the HYDRUS Wetland Module

Pucher

Langergraber

2018

Journal of Hydrology and Hydromechanics

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Abstract:In this study, the simulation results of four vertical flow wetland systems using the HYDRUS Wetland Module are presented. The four wetland systems comprise three single-stage pilot scale systems and one full-scale two-stage system. The main difference between these systems is the filter media used, referred to as fine media, i.e., sand with a grain size distribution 0.063-4 mm, or coarse media, i.e., sand with grain size distributions between 1-4 mm, respectively. The water-flow simulation of each system is carried out using the single porosity van Genuchten-Mualem model. A good match between measured and simulated volumetric effluent flow rates could be achieved for all wetland systems. For reactive transport simulations, the CW2D biokinetic model was applied. First, simulations were run using the standard CW2D parameter set. For some systems, adjustments of the parameter set were needed in order to avoid unlimited bacteria growth. To better fit measured COD, NH 4 -N, and NO 3 -N effluent concentrations, adjustments of few parameters of the standard parameter set were required. The results show that for the VF wetlands with fine sand, no adjustments of the CW2D standard parameter set were needed, while for systems with coarser filter media as the main layer, the standard parameter set had to be adjusted to match simulated and measured effluent concentrations.

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Activated Sludge Models ASM1, ASM2, ASM2d and ASM3

Cited by 795 publications

References 1 publication

Comparison of Two Mathematical Models for Greenhouse Gas Emission from Membrane Bioreactors

Comparison of Two Mathematical Models for Greenhouse Gas Emission from Membrane Bioreactors

Mathematical Modelling of Phosphorus Accumulation in Photo-Biological Treatment Plants of a Biosphere-Compatible City

Simulating vertical flow wetlands using filter media with different grain sizes with the HYDRUS Wetland Module

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