Improvement of ammonia removal in activated sludge process with feedforward-feedback aeration controllers

Vrečko, Darko; Hvala, Nadja; Stare, A.; Burica, Olga; Stražar, Marjeta; Levstek, Meta; Cerar, P; Podbevsek, S

doi:10.2166/wst.2006.098

Cited by 66 publications

(33 citation statements)

References 5 publications

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“…Una estructura similar se presenta en Vrečko et al (2006) . En se aplican diferentes estructuras cascada/feedorward basadas en controladores PID para la eliminación de nitrógeno.…”

Section: Control Clásicounclassified

Control en Estaciones Depuradoras de Aguas Residuales: Estado actual y perspectivas

Vilanova

Santín²,

Pedret³

2017

Revista Iberoamericana de Automática e Informática Industrial R

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ResumenEste trabajo constituye la segunda parte de una revisión de la problemática del control de estaciones depuradoras de aguas residuales (EDAR) para el tratamiento de agua residual urbana. Después de haber presentado en la primera parte las perspectivas correspondientes al modelado y simulación, en esta segunda parte nos centramos en el control de las mismas. Esta depuración se realiza, mayoritariamente, mediante procesos biológicos, concretamente, mediante el denominado proceso de fangos activados. El hecho de tratar con un proceso biológico conlleva una elevada complejidad tanto desde el punto de vista de modelado como, por supuesto, de control. Se revisa el control de EDAR desde su perspectiva histórica, como de los lazos de control más usuales, problemáticas que presentan y algunas de las soluciones propuestas. Se realiza también una revisión de la aplicación de las diferentes técnicas de control catalogándolas de acuerdo a su filosofía. Para terminar se ofrece una visión de las tendencia actuales y perspectivas de desarrollos futuros. Palabras Clave:Estaciones depuradoras de aguas residuales, benchmarking, control y operación

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“…Una estructura similar se presenta en Vrečko et al (2006) . En se aplican diferentes estructuras cascada/feedorward basadas en controladores PID para la eliminación de nitrógeno.…”

Section: Control Clásicounclassified

Control en Estaciones Depuradoras de Aguas Residuales: Estado actual y perspectivas

Vilanova

Santín²,

Pedret³

2017

Revista Iberoamericana de Automática e Informática Industrial R

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“…On the contrary, when NH is lower, less DO is required, producing less NO. Other works have experimented in the NH5 control by manipulating DO5 set point ( [7], [8]). Nevertheless, these investigations use default PI controllers at the lower level.…”

Section: B Two Level Hierarchical Control Configurationmentioning

confidence: 99%

“…[7] tested with PI controllers and [8] with PI controllers and a MPC. Both references worked with a variation of BSM1.…”

Section: Introductionmentioning

confidence: 99%

Model predictive control and fuzzy control in a hierarchical structure for wastewater treatment plants

Santín

Pedret

Vilanova

2014

2014 18th International Conference on System Theory, Control and Computing (ICSTCC)

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This paper presents a hierarchical two-level control structure for a biological wastewater treatment plant (WWTP), with the goal of simultaneously improving the effluent quality and reducing operational costs. The Benchmark Simulation Model No.1 is used as working scenario.The idea is to adjust the dissolved oxygen in the fifth tank (DO5) according with the present working conditions, instead of keeping it in a fixed value. Thus is concreted by a hierarchical structure. MPC with inlet flow rate feedforward control (MPC + FF) is proposed for the lower level to control nitrate nitrogen concentration of the second tank (NO2) and DO5. The high level is the responsible for adjusting the DO setpoint in the fifth tank (DO5 setpoint) of the controller of the low level, according with the ammonium and ammonia nitrogen concentration in the fifth tank (NH5). The controller for the high level is based on a Fuzzy control. A tuning region has been determined for the high level controller, in which the results show a simultaneously improvement of the effluent quality and operational cost.

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“…In the literature, there are several papers working on modeling of Wastewater Treatment Plants (WWTPs) [4][5][6][7]. In this One of the conclusions was that the literature demonstrates that to manage WWTPs in a sustainable way, the indicators, including operational costs, net energy and multiple environmental performance measures, including GHG, have to be considered.…”

Section: Introductionmentioning

confidence: 99%

Joint Environmental and Economical Analysis of Wastewater Treatment Plants Control Strategies: A Benchmark Scenario Analysis

2016

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Abstract:In this paper, a joint environmental and economic analysis of different Wastewater Treatment Plant (WWTP) control strategies is carried out. The assessment is based on the application of the Life Cycle Assessment (LCA) as a method to evaluate the environmental impact and the Benchmark Simulation Model No. 1 (BSM1). The BSM1 is taken as the benchmark scenario used to implement the control strategies. The Effluent Quality Index (EQI) and the Overall Cost Index (OCI) are two indicators provided by BSM1 and used to evaluate the plant's performance from the effluent quality and the economic points of view, respectively. This work conducts a combined analysis and assessment of ten different control strategies defined to operate a wastewater treatment plant. This analysis includes the usual economic and performance indexes provided by BSM1 joined with the LCA analysis that determines the environmental impact linked to each one of the considered control strategies. It is shown how to get an overall evaluation of the environmental effects by using a normalized graphical representation that can be easily used to compare control strategies from the environmental impact point of view. The use of only the BSM1 indexes provides an assessment that leads to a clustering of control strategies according to the cost/quality tradeoff they show. Therefore, regarding the cost/quality tradeoff, all strategies in the same group are almost equal and do not provide an indication on how to proceed in order to select the appropriate one. It is therefore shown how the fact of adding a new, complementary, evaluation (LCA based) allows either to reinforce a decision that could be taken solely on the basis of the EQI/OCI tradeoff or to select one control strategy among the others.

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Improvement of ammonia removal in activated sludge process with feedforward-feedback aeration controllers

Cited by 66 publications

References 5 publications

Control en Estaciones Depuradoras de Aguas Residuales: Estado actual y perspectivas

Control en Estaciones Depuradoras de Aguas Residuales: Estado actual y perspectivas

Model predictive control and fuzzy control in a hierarchical structure for wastewater treatment plants

Joint Environmental and Economical Analysis of Wastewater Treatment Plants Control Strategies: A Benchmark Scenario Analysis

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