GR1010991B - STATIC CYLINDRICAL POLYPROPYLENE (PP) VERY SMALL BUBBLE AIR DIFFUSER FOR AEROBIC AND ANAEROBIC BIOLOGICAL WASTEWATER TREATMENT PROCESSES - Google Patents

Abstract

Static cylindrical polypropylene (PP) air diffuser of very small bubbles for aerobic and anaerobic biological wastewater treatment plants, is an air or gas diffuser in a liquid dispersion medium, with a main scope of application for the aeration of wastewater in biological treatment plants. Unlike the known types of static diffusers, which produce medium-sized bubbles, this static diffuser (Figure 1 - no. 1) has a specially shaped head cone (Figure 2 - no. 3) which helps in the recirculation of the bubbles within the diffuser, increasing its efficiency. It also has additional fins inside the plastic cylinders (Figure 3 - no. 4 and 5) which help in the uniform distribution of the bubbles within the diffuser, and therefore a longer residence time of the bubbles throughout the mass of liquid waste and therefore greater efficiency. In the invention in question, many other features of static diffusers are improved, such as the recirculation of the liquid element through the diffuser by adding a cone to the diffuser head (Figure 2 - 3), as well as the problem of intense vibrations during their operation, by assembling the circular elements with a relative position of 60 degrees by applying guides and notches (Figure 4 - no. 7 and 6). Finally, it is worth noting that the production process of the plastic elements is improved by the easy detachment of the plastic elements from the production matrix by engraving the ribs (Figure 5 - no. 8) inside the cylindrical elements.