Modelling and control strategy testing of biological and chemical phosphorus removal at Avedøre WWTP

Ingildsen, Pernille; Rosén, Christian; Gernaey, Krist V.; Nielsen, M. K.; Guildal, T.; Jacobsen, B N

doi:10.2166/wst.2006.115

Cited by 22 publications

(9 citation statements)

References 5 publications

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“…Where data series of up to three months for calibration are used in the literature, (Gernaey & Jorgensen 2004a;Ingildsen et al 2006;Sin et al 2008) we chose to use data covering a full year, 2007, for model calibration. The idea is that random events in a full-scale plant, such as external discharges, sensor failure, etc.…”

Section: Plant Model Creationmentioning

confidence: 99%

Cost optimisation and minimisation of the environmental impact through life cycle analysis of the waste water treatment plant of Bree (Belgium)

Gussem

Wambecq

Roels

et al. 2011

Water Science and Technology

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An ASM2da model of the full-scale waste water plant of Bree (Belgium) has been made. It showed very good correlation with reference operational data. This basic model has been extended to include an accurate calculation of environmental footprint and operational costs (energy consumption, dosing of chemicals and sludge treatment). Two optimisation strategies were compared: lowest cost meeting the effluent consent versus lowest environmental footprint. Six optimisation scenarios have been studied, namely (i) implementation of an online control system based on ammonium and nitrate sensors, (ii) implementation of a control on MLSS concentration, (iii) evaluation of internal recirculation flow, (iv) oxygen set point, (v) installation of mixing in the aeration tank, and (vi) evaluation of nitrate setpoint for post denitrification. Both an environmental impact or Life Cycle Assessment (LCA) based approach for optimisation are able to significantly lower the cost and environmental footprint. However, the LCA approach has some advantages over cost minimisation of an existing full-scale plant. LCA tends to chose control settings that are more logic: it results in a safer operation of the plant with less risks regarding the consents. It results in a better effluent at a slightly increased cost.

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Section: Plant Model Creationmentioning

confidence: 99%

Cost optimisation and minimisation of the environmental impact through life cycle analysis of the waste water treatment plant of Bree (Belgium)

Gussem

Wambecq

Roels

et al. 2011

Water Science and Technology

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“…If the volume ratio of anaerobic/anoxic/oxic was more flexible, better results may be achieved. Ingildsen et al (2006) controlled the length of anaerobic/anoxic/oxic stage dynamically and resulted in the …”

Section: Effect Of Integrated Feedforward Control Systemmentioning

confidence: 99%

Mathematical Simulation of Feedforward Control for Nutrient Removal in Anaerobic–Anoxic–Oxic Processes

Shen

Qiu

Shi

2010

Environmental Engineering Science

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A method of establishing feedforward control strategy by integrating off-line simulations and on-line controls was proposed to improve the nutrient removal efficiency of anaerobic-anoxic-oxic processes and to save energy associated with aeration and recirculation. An activated sludge/anaerobic digestion model was applied and calibrated to provide accurate simulation by which different operation conditions were tested. Set-points of the internal recycle, external recycle, and dissolved oxygen concentration were optimized through analyzing the results of the steady-state simulations. By matching the optimal operation conditions to different influent loads, several feedforward control strategies were developed. The simple structure of the strategies made them easy to be implemented in full-scale wastewater treatment plants. Nutrient removal efficiency of the strategies was further validated through dynamic simulation. Effluent quality and energy consumption under each operating strategy were evaluated. Results showed that the removal efficiency of total phosphorus increased from 56.2% to 67.2%, whereas the effluent ammonia and total nitrogen were always kept below predefined levels. Moreover, the aeration and internal recirculation had decreased by 8.5% and 3.4%, respectively.

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“…However, before this could be done substantial modelling and simulation studies were conducted to test ideas and study the impact of the operational conditions on simulated EBPR strategies. The results showed considerable promise (details are presented in Ingildsen et al, 2006). Encouraged by the results from the simulation study and from studies on the nitrogen removal capacity at Avedøre (Rosen et al, 2004) an EBPR control strategy was launched in full-scale during the summer of 2004.…”

Section: Introductionmentioning

confidence: 99%

Introducing biological phosphorus removal in an alternating plant by means of control: a full scale study

Rosén

Ingildsen

Guildal³

et al. 2006

Water Science and Technology

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In this paper, a control strategy for introducing enhanced biological phosphorus removal (EBPR) in an alternating plant designed for enhanced biological nitrogen removal (EBNR) is presented. Alternating aerobic and anaerobic conditions to promote EBPR are provided by controlling the phases of the operational cycle, instead of a separate anaerobic volume. By utilising the control schemes already built in the STAR control system for nitrogen removal, the control strategy is fully integrated in the system. The control system relies on on-line measurements of nitrogen (ammonia and/or nitrate) and orthophosphate. The control strategy has been implemented in full-scale operation at the Avedøre wastewater treatment plant in Denmark and the results show clear indications of success. The control strategy has operated robustly for several months with a 60% decrease in use of precipitation chemicals.

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Modelling and control strategy testing of biological and chemical phosphorus removal at Avedøre WWTP

Cited by 22 publications

References 5 publications

Cost optimisation and minimisation of the environmental impact through life cycle analysis of the waste water treatment plant of Bree (Belgium)

Cost optimisation and minimisation of the environmental impact through life cycle analysis of the waste water treatment plant of Bree (Belgium)

Mathematical Simulation of Feedforward Control for Nutrient Removal in Anaerobic–Anoxic–Oxic Processes

Introducing biological phosphorus removal in an alternating plant by means of control: a full scale study

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