Equipment for Highly Efficient Treatment of Waste Water at Agricultural Enterprises

Abstract

The paper proposes a highly efficient equipment for the preliminary mechanical treatment of wastewater from agricultural enterprises, ensuring a continuous working process, the necessary quality of cleaning with minimal energy expenditure. The equations for determining the basic operating parameters of the equipment are given: changes in the flow area, flow rates of water passing through the installation, the required power of the electric motors. Also presented are graphical dependencies calculated using the obtained equations.

Development of the Scheme of the Installation for Mechanical Wastewater Treatment

“…This problem is solved in the proposed article. Additionally, the work gives the dependencies for determining the main operational parameters of the installation, on the basis of which a methodology for its design calculation can subsequently be developed [Sevostianov, 2019]. Figure 4 shows the scheme of the installation for preliminary mechanical treatment of wastewater developed by the authors.…”

“…In order to prevent a significant drop in the pre-treatment performance of the effluent in the proposed installation, the gratings should be cleaned at the time t = 0.5•t 1 . For reception of the graphical dependence of t I , S р.тах must be taken as a part of the cross-sectional area of the pipe -S p , which can be calculated, depending on the diameter D p : The flow rate Q c is determined based on the specified daily volume of wastewater at the enterprise Q Σ = 500 m 3 /day, the duration of shift T ds = 8 h, the coefficient k np that takes into consideration the duration of downtime due to the scheduled maintenance operations (cleaning, lubrication, adjustment, replacement and replenishment of working fluid in the hydraulic system, preventive testing of electrical and electronic parts of equipment, downtime for organizational and technical reasons (absence of worker, foreman, adjuster, work, raw materials, electricity, documentation, etc., as well as the coefficient variability of work k vw = 3 by the formula [Sevostianov 2019…”

“…   (10) where: μ l is the coefficient of flow through the lattices [Kovaleva, 2011]; ρ d -average density of drains; Δр is the pressure difference, under which the drains pass through pipe 11 (we consider it constant for a given installation). Current flow rate:…”