Mixed Integer nonlinear optimization of biological processes in wastewater sequencing batch reactor

Piotrowski, Robert; Lewandowski, Mateusz; Paul, Aleksander

doi:10.1016/j.jprocont.2019.10.002

Cited by 21 publications

(9 citation statements)

References 23 publications

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“…Various DO control algorithms are described in the literature [3][4][5][6][7][8][9][10][11][12][13][14]. New solutions are intended to decrease energy consumption and improve the stability of particular process phases.…”

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confidence: 99%

Designing Control Strategies of Aeration System in Biological WWTP

Piotrowski

Ujazdowski

2020

Energies

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The paper presents the complete design processes of novel aeration control systems in the SBR (sequencing batch reactor) wastewater treatment plant (WWTP). Due to large energy expense and a high influence on biological processes, the aeration system plays a key role in WWTP operation. The paper considers the aeration system for a biological WWTP located in the northeast of Poland. This system consists of blowers, the main collector pipeline, three aeration lines with different diameters and lengths, and diffusers. Classical control systems applied for this type of installation are based on PID (proportional–integral–derivative) controllers, the settings of which are often found experimentally. The article presents the optimization of these settings and the design of an alternative control algorithm—the fuzzy controller.

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confidence: 99%

Designing Control Strategies of Aeration System in Biological WWTP

Piotrowski

Ujazdowski

2020

Energies

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“…Solutions to these problems should be sought in heuristic algorithms. Their use to optimise the length and sequence of phases of a single SBR has so far been successfully applied and presented in [66,67]. The direction of adaptation of these algorithms to the management of several SBRs should therefore be a natural path for development and further research.…”

Section: Task Scheduling In Biological Wwtpmentioning

confidence: 99%

Task Scheduling–Review of Algorithms and Analysis of Potential Use in a Biological Wastewater Treatment Plant

Ujazdowski

Piotrowski

2022

IEEE Access

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The idea of task scheduling is to increase the efficiency of a system by minimising wasted time, evenly loading machines, or maximising the throughput of machines. Moreover, the use of appropriate scheduling algorithms often leads to a reduction in the energy costs of the process. Task scheduling problems are found in a variety of industrial areas, and their scale changes significantly depending on the problem. This review shows the extent to which task scheduling methods are used in industry. This paper presents methods and algorithms for solving task scheduling problems. In addition, an analysis of the possibility of using task scheduling methods to improve the efficiency of wastewater treatment plants was also conducted. This approach is based on the assumption of a balanced workload for multiple SBR reactors. Analysing the case of a wastewater treatment plant in Swarzewo City in northern Poland. The problem of scheduling tasks in a wastewater treatment plant has not been so far subject of research work.

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“…Most treatments in the literature on mathematical models related to SBRs focus on ODEs modeling the reactions by established activated sludge models [17,20,24,29]. Optimization and control problems are studied in [18,25,32,33,37] and statistical methods in [26,27]. Less consideration has been laid on the sedimentation in an SBR during which reactions occur.…”

Section: Related Workmentioning

confidence: 99%

A moving-boundary model of reactive settling in wastewater treatment. Part 1: Governing equations

Bürger¹,

Careaga²,

Diehl³

et al. 2021

Preprint

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Reactive settling is the process of sedimentation of small solid particles in a fluid with simultaneous reactions between the components of the solid and liquid phases. This process is important in sequencing batch reactors (SBRs) in wastewater treatment plants. In that application the particles are biomass (bacteria; activated sludge) and the liquid contains substrates (nitrogen, phosphorus) to be removed through reactions with the biomass. The operation of an SBR in cycles of consecutive fill, react, settle, draw, and idle stages is modeled by a system of spatially onedimensional, nonlinear, strongly degenerate parabolic convection-diffusion-reaction equations. This system is coupled via conditions of mass conservation to transport equations on a half line, whose origin is located at a moving boundary and that model the effluent pipe. A monotone and invariantregion-preserving finite difference scheme is proposed and applied to simulate operating cycles and the denitrification process within an SBR.

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Mixed Integer nonlinear optimization of biological processes in wastewater sequencing batch reactor

Cited by 21 publications

References 23 publications

Designing Control Strategies of Aeration System in Biological WWTP

Designing Control Strategies of Aeration System in Biological WWTP

Task Scheduling–Review of Algorithms and Analysis of Potential Use in a Biological Wastewater Treatment Plant

A moving-boundary model of reactive settling in wastewater treatment. Part 1: Governing equations

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