Dynamic Process Modelling of Activated‐Sludge Plants

Smith, M.; Dudley, J.

doi:10.1111/j.1747-6593.1998.tb00196.x

Cited by 9 publications

(3 citation statements)

References 6 publications

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“…Modelling of Activated-Sludge Processes Steady-state models of activated-sludge processes were developed in the early 1960s following the breakthrough in the understanding of the kinetics which had been made in the 1960s, and events are reviewed by Smith and Dudley (69). During the mid-1 970s, Jones(25) developed the BOD-based ASMODEL which used a…”

Section: Sequencing Batch Reactorsmentioning

confidence: 99%

“…This model was converted to dynamic form in the late 1970s for use on a mainframe computer and has been available for the last ten years. It has been developed gradually over the past two decades and now forms a key part of the WRc STOAT package (69). The IAWQ activated-sludge model, which uses COD, has been widely used since the m i d -1 9 8 0~(~~~~~) .…”

Section: Fig 10 Biological Nutrient-removal Plant At Stratford-uponmentioning

confidence: 99%

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Milestones in the Development of the Activated‐Sludge Process Over the Past Eighty Years (Abridged)

Cooper

Downing²

1998

Water & Environment J

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The biological filter was introduced during the latter part of the last century but, in 1913, a radical new process was developed which resulted in a four‐fold reduction in the size of sewage‐treatment plants. This new method was called the ‘activated‐sludge process', and whilst biological filters are still in use ‐ especially for small works ‐ activated sludge is now the dominant secondary treatment process and is the ‘engine’around which modern treatment systems are constructed. This paper (a) reviews the milestones in the evolution of the activated‐sludge process from 1913 to 1954, centering on reliable removal of BOD and suspended solids, (b) highlights the improvements in design capabilities (1955‐74), with the emphasis on the attainment of consistent nitrification, and (c) discusses the removal of nitrogen and phosphorus (1975‐97), with brief reference to computer modelling and the control of sludge properties.

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Section: Sequencing Batch Reactorsmentioning

confidence: 99%

Section: Fig 10 Biological Nutrient-removal Plant At Stratford-uponmentioning

confidence: 99%

Milestones in the Development of the Activated‐Sludge Process Over the Past Eighty Years (Abridged)

Cooper

Downing²

1998

Water & Environment J

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“…Developments in the field of modeling of sludge treatment processes, including both dynamic and steadystate conditions, are well presented in [9]. Based on a literature review Author enhances the importance of computer modeling of activated-sludge process during design of new and optimization of existing wastewater plants.…”

Section: Modeling Of the Activated Sludge Processmentioning

confidence: 99%

Nonlinear modeling of activated sludge process using the Hammerstein-Wiener structure

Frącz

2016

E3S Web Conf.

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Abstract. The paper regards to physical model of the Activated Sludge Process, which is a part of the wastewater treatment. The aim of the study was to describe nitrogen transformation process and the demand of chemical fractions, involved in the ASP process. Moreover, the non-linear relationship between the flow of wastewater and the consumed electrical energy, used by the blowers, was determined. Such analyses are important from the economical and environmental point of view. Assuming that the total power does not change the blower is charging during a year an energy amount of approx. 613 MW. This illustrates in particular the scale of the demand for energy consumption in the biological aeration unit. The aim is to minimize the energy consumption through first building a model of ASP and then through optimization of the overall process by modifying chosen parameter in numerical simulations. In this paper example measurement and analysis results of nitrite and ammonium nitrogen concentrations in the aeration reactor and the active power consumed by blowers for the aeration process were presented. Further the ASP modeling procedure, which uses the Hammerstein-Wiener structure and example verification results were presented. Based on the achieved results it was stated that the developed set of methodologies may be used to improve and expand the overriding control system for system for wastewater treatment plant.

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Dynamic modelling of solids in a full-scale activated sludge plant preceded by CEPT as a preliminary step for micropollutant removal modelling

Baalbaki

Torfs

Maere

et al. 2016

Bioprocess Biosyst Eng

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The presence of micropollutants in the environment has triggered research on quantifying and predicting their fate in wastewater treatment plants (WWTPs). Since the removal of micropollutants is highly related to conventional pollutant removal and affected by hydraulics, aeration, biomass composition and solids concentration, the fate of these conventional pollutants and characteristics must be well predicted before tackling models to predict the fate of micropollutants. In light of this, the current paper presents the dynamic modelling of conventional pollutants undergoing activated sludge treatment using a limited set of additional daily composite data besides the routine data collected at a WWTP over one year. Results showed that as a basis for modelling, the removal of micropollutants, the Bürger–Diehl settler model was found to capture the actual effluent total suspended solids (TSS) concentrations more efficiently than the Takács model by explicitly modelling the overflow boundary. Results also demonstrated that particular attention must be given to characterizing incoming TSS to obtain a representative solids balance in the presence of a chemically enhanced primary treatment, which is key to predict the fate of micropollutants

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Dynamic Process Modelling of Activated‐Sludge Plants

Cited by 9 publications

References 6 publications

Milestones in the Development of the Activated‐Sludge Process Over the Past Eighty Years (Abridged)

Milestones in the Development of the Activated‐Sludge Process Over the Past Eighty Years (Abridged)

Nonlinear modeling of activated sludge process using the Hammerstein-Wiener structure

Dynamic modelling of solids in a full-scale activated sludge plant preceded by CEPT as a preliminary step for micropollutant removal modelling

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