Development of the Scheme of the Installation for Mechanical Wastewater Treatment

Abstract

The paper presents the schemes of various equipment for the mechanical treatment of the industrial and domestic‎wastewater, which allows removing it from the main part of the pollution. An examination of the shortcomings‎of the known equipment with the aim of its improvement was conducted. As a result, an installation scheme for‎continuous high-performance mechanical wastewater treatment was proposed. In contrast to the known equipment,‎the proposed installation provides a three-staged treatment of wastewater with the help of the two pairs of‎gratings – for preliminary treatment (removal of large-size pollutions) and by filtration through the two metallic‎sieves – for normal and fine treatment (removal of small-size mechanical pollutions). The installation consists of‎highly-efficient appliances for the cleaning of filtering elements in the course of realization of the working process,‎which provides stable high productivity of treatment. The installation has simple reliable design and low energy‎expenses. The paper contains the formulas for determining of main operational parameters of the installation: the‎change of the cross-sectional area of the filtering elements and productivity of the working process, periodicity of‎cleaning of gratings and sieves, the necessary electric power of installations drives. These formulas can be a basis‎for further research of installation and for elaboration of a method of its design calculation.