<abstract xml:lang="en" xmlns="http://www.w3.org/1999/xhtml">The paper discusses the methodology of oxygen transfer virtual simulation in a wastewater biological treatment process, using the MATLAB/SIMULINK technology. A self-tuning adaptive model of a wastewater aeration tank, as a non-stationary object, with variable time dependent sensitivity and inertia indexes, as the functions of input variable - air pneumatic supply capacity Lg(t) (m3/min), output variable - dissolved oxygen concentration C(t) (g/m3) and oxygen expenditure, as a load - q(t) (g/min), required for wastewater complete purification, is expounded. Virtual models, applying Laplace transforms and SIMULINK blocks library, are composed in order to compare the transient processes of dissolved oxygen concentration in the simplified stationary model with constant sensitivity and inertia coefficients, and in the non-stationary model with variable sensitivity and inertia indexes. The simulation block-diagram for non-stationary model adoption to the variable parameters is developed, using informative links from input variable Lg(t), from variable load q(t) and feedback from output variable C(t) as inputs of calculation modulus, allowing to instantly re-calculate the variable indexes during simulation time. Comparison of the simplified stationary model and the non-stationary model shows that the simulation results of oxygen transfer differ up to 50%.</abstract>

The paper discusses the methodology of oxygen transfer virtual simulation in a wastewater biological treatment process, using the MATLAB/SIMULINK technology. A self-tuning adaptive model of a wastewater aeration tank, as a non-stationary object, with variable time dependent sensitivity and inertia indexes, as the functions of input variable - air pneumatic supply capacity Lg(t) (m3/min), output variable - dissolved oxygen concentration C(t) (g/m3) and oxygen expenditure, as a load - q(t) (g/min), required for wastewater complete purification, is expounded. Virtual models, applying Laplace transforms and SIMULINK blocks library, are composed in order to compare the transient processes of dissolved oxygen concentration in the simplified stationary model with constant sensitivity and inertia coefficients, and in the non-stationary model with variable sensitivity and inertia indexes. The simulation block-diagram for non-stationary model adoption to the variable parameters is developed, using informative links from input variable Lg(t), from variable load q(t) and feedback from output variable C(t) as inputs of calculation modulus, allowing to instantly re-calculate the variable indexes during simulation time. Comparison of the simplified stationary model and the non-stationary model shows that the simulation results of oxygen transfer differ up to 50%.

Adaptive Model of Wastewater Aeration Tank

Latvia University of Agriculture, Faculty of Engineering, Institute of Agricultural Energetics

Environmental and Climate Technologies

{"article-title":"Adaptive Model of Wastewater Aeration Tank"}

The paper discusses the methodology of oxygen transfer virtual simulation in a wastewater biological treatment process, using the MATLAB/SIMULINK technology. A...

Adaptive Model of Wastewater Aeration Tank

Publié en ligne: 13 janv. 2012

Pages: 112 - 117

DOI: https://doi.org/10.2478/v10145-011-0016-0

Mots clés
Modelling, oxygen, self-tuning adaptive model, sensitivity and inertia indexes, wastewater aeration tank

This content is open access.

Adaptive Model of Wastewater Aeration Tank

Publié en ligne: 13 janv. 2012

Pages: 112 - 117

DOI: https://doi.org/10.2478/v10145-011-0016-0

Mots clésModelling, oxygen, self-tuning adaptive model, sensitivity and inertia indexes, wastewater aeration tank

This content is open access.

Mots clés
Modelling, oxygen, self-tuning adaptive model, sensitivity and inertia indexes, wastewater aeration tank