Modeling Dissolved Oxygen Concentration for Optimizing Aeration Systems and Reducing Oxygen Consumption in Activated Sludge Processes: A Review

Pittoors, Erika; Guo, Yaping; Hulle, Stijn Van

doi:10.1080/00986445.2014.883974

Cited by 52 publications

(22 citation statements)

References 49 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…In the descending part a slight deviation between experimental and predicted values can be noted. This could be explained by the influence of biomass concentration on the oxygen mass transfer coefficient . This aspect, however, is not included in the model structure.…”

Section: Resultsmentioning

confidence: 99%

Model based analysis of the growth kinetics of microalgal species residing in a waste stabilization pond

Decostere

Alvarado

Sánchez

et al. 2016

J of Chemical Tech & Biotech

View full text Add to dashboard Cite

BACKGROUND In this study the growth kinetics of Chlorella and Scenedesmus, isolated from a Waste Stabilization Pond were investigated under different conditions of light intensity and temperature. Experimental data were collected by means of a combined respirometric and titrimetric set‐up and used to extend a mathematical model. RESULTS The experimental results illustrated the interdependent relationship of light intensity and temperature, which had a significant influence on the microalgal growth. Consequently, a previously developed model was extended with a mathematical function that describes this relationship. The maximum specific growth rate and oxygen mass transfer coefficient were considered for model calibration. The optimized parameter values for Chlorella were μmax = 0.56 ± 0.0008 d−1 and KLa = 10.02 ± 0.02 d−1. For Scenedesmus, the optimized parameter values were μmax = 0.19 ± 0.0004 and KL a = 7.71 ± 0.004 d−1. The model with optimized parameter settings described the dissolved oxygen production (derived from the respirometric data) and the related proton consumption (derived from the titrimetric data) reasonably well for both microalgal species. The threshold value for Theil's Inequality Coefficient of 0.3 was never exceeded. In addition, model validation for both species was performed indicating good correspondence between model prediction and experimental values. CONCLUSIONS Based on the experimental observations, a previously developed mathematical model was extended with a function that describes the interaction between light intensity and temperature. After model calibration a difference in maximum specific growth rate between the two microalgal species was observed. This might be explained by differences in cell metabolism. © 2016 Society of Chemical Industry

show abstract

Section: Resultsmentioning

confidence: 99%

Model based analysis of the growth kinetics of microalgal species residing in a waste stabilization pond

Decostere

Alvarado

Sánchez

et al. 2016

J of Chemical Tech & Biotech

View full text Add to dashboard Cite

show abstract

“…An ample and evenly distributed oxygen supply in an aeration system is the key to rapid, economically-viable, and effective wastewater treatment. Maintaining the dissolved oxygen concentration (DO) at a certain setpoint represents one of the major concerns of researchers in ASP control [2]. This is due to the fact that a very low dissolved oxygen concentration in the aeration tank results in biomass die-off, while an excessively high dissolved oxygen level increases energy consumption and may degrade the sludge quality.…”

Section: Fig1 Simple Configuration For the Activated Sludge Processmentioning

confidence: 99%

Fractional Order Control for Aeration of Activated Sludge Wastewater Treatment Processes

Li¹,

Zhang²,

Wei³

et al. 2016

Proceedings of the 2016 4th International Conference on Machinery, Materials and Information Technology Applications

View full text Add to dashboard Cite

Abstract. In this paper, the design scheme of fractional order proportional integral (FOPI) controller for the second order plus time delay model of aeration of activated sludge wastewater treatment process are presented. It is found that the two controllers designed by the proposed tuning method not only make the system stable, but also improve the performance for the aeration control of activated sludge wastewater treatment processes. Simulation results are presented to validate the proposed tuning schemes. Furthermore, from the simulation results, it can be seen that the fractional order PI controller outperforms the integer order PID controller.

show abstract

“…Big efforts to optimize the activated sludge system have been done since some time ago. WWTP reconfiguration, optimal control of the aeration systems, equipments maintenance and replacement, can lead to higher energy efficiencies and savings [32]. Liu et al [33] showed that the standard oxygen transfer rate of a 10-year-old aeration system is significantly reduced, and its replacement could lead to energy savings of over 10%, with a payback period less than 14 months.…”

Section: New Approaches To Optimize Wwtp Energy Balancementioning

confidence: 99%

Significance of anaerobic digestion as a source of clean energy in wastewater treatment plants

Silvestre

Fernández

Blasi

2015

Energy Conversion and Management

109

View full text Add to dashboard Cite

Modeling Dissolved Oxygen Concentration for Optimizing Aeration Systems and Reducing Oxygen Consumption in Activated Sludge Processes: A Review

Cited by 52 publications

References 49 publications

Model based analysis of the growth kinetics of microalgal species residing in a waste stabilization pond

Model based analysis of the growth kinetics of microalgal species residing in a waste stabilization pond

Fractional Order Control for Aeration of Activated Sludge Wastewater Treatment Processes

Significance of anaerobic digestion as a source of clean energy in wastewater treatment plants

Contact Info

Product

Resources

About