Leicester, United Kingdom

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    ABSTRACT: Abstract This paper presents development of water network model reduction software, Simplifier2. The application can be integrated with other concepts applied to water distribution system or it can be used as a standalone tool for the purpose of the model simplification only. The utilisation of parallel programming techniques and sparse matrices ordering algorithms drastically increased the speed of simplification. Simplifier2 is able to reduce the water network model, consisting of several thousand elements, in less than 1 minute calculation time. Simplifier2 has been already successfully utilised in a number of research and commercial projects.
    Procedia Engineering 12/2015; 119(1):486 - 495. DOI:10.1016/j.proeng.2015.08.871
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    ABSTRACT: This paper proposes a structure of an integrated mathematical model of a membrane bioreactor (MBR) and describes the links between two main parts of a MBR model: the bioreactor and the membrane. In case of an immersed MBR three types of links are considered: a relationship between specific cake resistance (SCR) and extracellular polymeric substances (EPS) in the bioreactor, a relationship between air scour rate and shear stresses on the membrane surface, and a relationship between concentration of soluble microbial products (SMP) in the bioreactor and rate of pore constriction. While SMP concentration features directly in the equations of pore constriction, EPS are assumed to affect SCR which in turn has an effect on cake filtration. The relationship between EPS and SCR is described with a linear algebraic equation. Shear stresses on the membrane surface are calculated as a function of air scour rate with a one-dimensional slug flow model.
    Procedia Engineering 12/2015; 119(1):1338-1347. DOI:10.1016/j.proeng.2015.08.973
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    ABSTRACT: This paper presents an activated sludge model suitable for modelling membrane bioreactors (MBRs) for wastewater treatment. The model, later referred to as combined EPS and SMP production ASM1-based model (CES-ASM1), extends Activated Sludge Model No. 1 (ASM1) with biokinetics of two types of bacterial biopolymers: soluble microbial products (SMP) and extracellular polymeric substances (EPS). The biopolymer kinetics in CES-ASM1 are, in their majority, borrowed from Laspidou and Rittmann[1] although, as shall be explained in the article, with one conceptual correction a kinetic pathway of biomass associated products (BAP). CES-ASM1 was calibrated on published experimental results from batch and continuous flow laboratory and pilot plant experiments and proved to be in good agreement with measurements. Standard set of parameters was then proposed as a combination of empirically identified and literature values. The model was then used to predict SMP and EPS production in an activated sludge system under various operating conditions.
    Procedia Engineering 12/2015; 119(1):1318-1327. DOI:10.1016/j.proeng.2015.08.958


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    The Gateway, LE1 9BH, Leicester, United Kingdom
  • Head of Institution
    Vice-Chancellor Professor Dominic Shellard
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Top publications last week by reads

Foodservice Research International 06/2006; 13(1):41 - 55. DOI:10.1111/j.1745-4506.2001.tb00028.x
174 Reads
Journal of Clinical Nursing 04/2004; 13(3a):45-53. DOI:10.1111/j.1365-2702.2004.00926.x
169 Reads

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