| Abstrakt: |
The biological process in a conventional wastewater treatment plant is one of the largest consumers of energy in wastewater treatment technology. The biological process can use from about 50% to 90% of the electricity used by a treatment plant (depending on its size and technological solutions used), while the cost of energy used can be up to 15–49% of the total costs of an installation. In Slobozia Wastewater Treatment plant, the energy consumption and operational costs were very high, due to the use of surface aerators in the biological tanks. In order to optimize the biological treatment and energy consumption, the present paper analyses the replacement of surface aeration with a fixed grid aeration system with membrane diffusers. By using a fine bubble aeration – lobe blower system, optimized regarding number of diffusers, aeration grids sizing, membrane material, membrane perforations size, blower motor power, the energy consumption in a wastewater treatment plant was considerably reduced and the oxygen transfer efficiency (SAE kgO2/kWh) was increased. [ABSTRACT FROM AUTHOR] |
