Technika dezintegracji ultradźwiękowej w technologii ścieków i osadów ściekowych
Ultrasonic disintegration in wastewater and sewage sludge technology
With the higher standards of wastewater treatment and sewage sludge utilization the higher requirements for effectiveness of employed processes are also set. Further more, the quantity and the characteristics of sewage sludge and particularly the presence of questionable sludge (i.e. floating, bulking activated sludge, municipal-industrial mixed sludge) cause significant problems connected with costs and conditions of utilization. In the paper the possibility of ultrasounds application in environmental engineering is presented. The ultrasonic disintegration technique can be described as an agent facilitating sewage sludge sedimentation, thickening, stabilization and dewatering. However, the direct application of ultrasounds depends on physical parameters of ultrasonic waves. The increase in effectiveness of the different stages of sewage treatment with ultrasonic field application requires laboratory analysis. With the reference to the available knowledge and research experience, the ultrasonic technique was feasible to employ. According to the literature cited in the paper, the application of ultrasounds in environmental engineering is implemented in sewage sludge treatment and utilization. The equipment and parameters for application of ultrasounds are already known in order to design equipment for industrial purposes and carry out pilot tests.
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