Modelling biological phosphorus and nitrogen removal in a full scale activated sludge process

Veldhuizen, H.M. van; Loosdrecht, M.C.M. van; Heijnen, Joseph J.

doi:10.1016/s0043-1354(99)00064-0

Cited by 124 publications

(46 citation statements)

References 9 publications

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“…The observed increase in the influent C/N and C/P ratios was attributed to a high non-biodegradable COD fraction and particulate compounds with low COD/VSS ratios. van Veldhuizen et al (1999) also found that hydrolysis and fermentation processes did not play a major role in the overall treatment performance, especially for P removal. A primary effluent in the studied plant was primarily composed of soluble COD (46 % of total COD), including VFAs (30 % of soluble COD).…”

Section: Conventional Our Measurementsmentioning

confidence: 98%

“…Recent experimental observations indicate, however, that the removal of particles is not instantaneous and better described by flocculation-hydrolysis rather than a one-step hydrolysis (Jimenez et al 2005). The latest reported full-scale data on the effects of particulate and colloidal substrate on process performance are ambiguous and suggest that different behaviours may result from complex interactions occurring in the activated sludge systems (van Veldhuizen et al 1999;Tas et al 2009;Tuncal et al 2009;Puig et al 2010).…”

Section: Introductionmentioning

confidence: 99%

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The role of biodegradable particulate and colloidal organic compounds in biological nutrient removal activated sludge systems

Drewnowski

Mąkinia

2013

Int. J. Environ. Sci. Technol.

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The efficiency of denitrification and enhanced biological phosphorus removal in biological nutrient removal activated sludge systems is strongly dependent on the availability of appropriate carbon sources. Due to high costs of commercial compounds (such as methanol, ethanol, acetic acid, etc.) and acclimation periods (usually) required, the effective use of internal substrates is preferred. The aim of this study was to determine the effects of slowly biodegradable compounds (particulate and colloidal), as internal carbon sources, on denitrification, phosphate release/uptake and oxygen utilization for a full-scale process mixed liquor from two large wastewater treatment plants located in northern Poland. Since it is difficult to distinguish the effect of slowly biodegradable substrate in a direct way, a novel procedure was developed and implemented. Four types of one-and two-phase laboratory batch experiments were carried out in two parallel reactors with the settled wastewater without pre-treatment (reactor 1) and pre-treated with coagulation-flocculation (reactor 2). The removal of colloidal and particulate fractions resulted in the reduced process rates (except for phosphate release). The average reductions ranged from 13 % for the oxygen utilization rate during the second phase of a two-phase experiment (anaerobic/aerobic), up to 35 % for the nitrate utilization rate (NUR) during the second phase of a conventional NUR measurement.

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Section: Conventional Our Measurementsmentioning

confidence: 98%

Section: Introductionmentioning

confidence: 99%

The role of biodegradable particulate and colloidal organic compounds in biological nutrient removal activated sludge systems

Drewnowski

Mąkinia

2013

Int. J. Environ. Sci. Technol.

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“…In addition to the ASM family models, in which the mass balance is based on the COD, there are also models that use the mass balance of the BOD, for example the ASAL models [4]. Models describing in detail the metabolism of organisms involved in the pollutants decomposition, which include, among others, TUDP model are described in [5][6]. The activated sludge system model is composed not only from the activated sludge (biochemical model, e.g.…”

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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“…Veldhuizen and associate authors published an article about modelling of biological phosphorus and nitrogen removal that is closely connected to PHA synthesis and degradation in a full-scale activated sludge plant 81 . An activated sludge model 82 (ASM2) foreseen for the removal of COD, N and P was the basis for model development.…”

Section: Ta B L E 2 -Properties Of Dynamic Models Dealing With Pha Bimentioning

confidence: 99%

Mathematical Modelling as a Tool for Optimized PHA Production

Novák

Koller

Braunegg

et al. 2015

Chem.Biochem.Eng.Q.

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c ARENA -Association for resource efficient and sustainable technologies, Inffeldgasse 21b, 8010 Graz, AustriaThe potential of poly(hydroxyalkanoates) (PHAs) to replace conventional plastic materials justifies the increasing attention they have drawn both at lab-scale and in industrial biotechnology.The improvement of large-scale productivity and biochemical/genetic properties of producing strains requires mathematical modeling and process/strain optimization procedures. Current models dealing with structurally diversified PHAs, both structured and unstructured, can be divided into formal kinetic, low-structured, dynamic, metabolic (high-structured), cybernetic, neural networks and hybrid models; these attempts are summarized in this review. Characteristic properties of specific groups of models are stressed in light of their benefit to the better understanding of PHA biosynthesis, and their applicability for enhanced productivity. Unfortunately, there is no single type of mathematical model that expresses exactly all the characteristics of producing strains and/or features of industrial-scale plants; in addition, the different requirements for modelling of PHA production by pure cultures or mixed microbial consortia have to be addressed. Therefore, it is crucial to sophisticatedly adapt and fine-tune the modelling approach accordingly to actual processes, as the case arises. For "standard microbial cultivations and everyday practices", formal kinetic models (for simple cases) and "low-structured" models will be appropriate and of great benefit. They are relatively simple and of low computational demand.To overcome the specific weaknesses of different established model types, some authors use hybrid models. Here, satisfying compromises can be achieved by combining mechanistic, cybernetic, and neural and computational fluid dynamics (CFD) models. Therefore, this hybrid modelling approach appears to constitute the most promising solution to generate a holistic picture of the entire PHA production process, encompassing all the benefits of the original modelling strategies. Complex growth media require a higher degree of model structuring. For scientific purposes and advanced development of industrial equipment in the future, real systems will be modelled by highly organized hybrid models.All solutions related to modelling PHA production are discussed in this review.

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Modelling biological phosphorus and nitrogen removal in a full scale activated sludge process

Cited by 124 publications

References 9 publications

The role of biodegradable particulate and colloidal organic compounds in biological nutrient removal activated sludge systems

The role of biodegradable particulate and colloidal organic compounds in biological nutrient removal activated sludge systems

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

Mathematical Modelling as a Tool for Optimized PHA Production

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