THE USAGE OF ULTRASOUNDS TO DISINTEGRATE ESCHERICHIA COLI BACTERIA CONTAINED IN TREATED WASTEWATER

Abstract

Wastewater and sewage sludge is a place of occurrence of the many microorganisms, including pathogenic and relatively pathogenic bacteria. Their number is subject to significant changes over time, and depends on many factors such as: type of wastewater flowing into the treatment plant, or the presence of substances that are a source of food for microorganisms. Wastewater allows microorganisms to enter other environments, such as receiver waters or soil. The type of pathogens contained in wastewater depends primarily on changes in the carrier organisms and environmental conditions. In the case when the wastewater treatment plant accepts municipal wastewater transported with vacuum truck to catch points, the degree of biological hazard is undefined. It also increases as the amount of treated industrial waste-water increases. Elimination of the hazard requires disinfection of treated wastewater [1, 2]. The amount of wastewater discharged in total is constantly increasing. Changes in the amount of total effluent discharged throughout the country over the last decade (2008-2017) are shown in Figure 1. According to Polish law, the Act of June 7, 2001 on the collective water supply and collective sewage disposal (Journal of Laws of 2018, item 1152, as amended) [4] regulates a number of issues related to the proper functioning of water and sewage companies. In the field of wastewater treatment, it imposes on these enterprises the obligation to ensure proper functioning of wastewater treatment plants operated by enterprises and what is inseparably connected with it-the obligation to properly treat the wastewater. The required effect of wastewater treatment, called