Calculation of pneumatic aeration systems in aeration tanks

Summary

The pneumatic aeration system of the aeration tank at the wastewater treatment facilities is considered. Prime costs of electricity at the treatment facilities go towards ensuring the operation of the aeration system, for which reason the problem of the optimal air distribution over all the operational zones is raised. At the same time, either the lack of air, even at some treatment stages, or its excess leads to a decrease in the treatment efficiency. Providing for the controlled air supply only with the use of measuring instruments is quite expensive; therefore, it is proposed to use a mathematical model for aerodynamic calculation of an aeration system with non-fixed air supply through aerators. Based on the results of the aerodynamic calculation, the adaptive control of air distribution in the aeration system with a change in the flow and quality of incoming wastewater, pressure-flow characteristics of aerators, pressure, temperature and humidity of the outside air can be provided. An example of the aerodynamic calculation of a pneumatic aeration system is given.

Key words

air blower unit , pneumatic aeration system , flow distribution task , wastewater treatment facilities , fine-bubble aeration , aerodynamic calculation