Investment efficiency contemporary filter material in water treatment systems drip irrigation

The purpose of the study was to prove the investment efficiency of filter materials based on mining waste in water treatment in drip irrigation systems. The object of the study are water purification station for drip irrigation systems, which is proposed sand and gravel filters replaced by Polymer filters using filter elements manufactured on the basis of mining waste. The studies were conducted on farmland of “Rassvet” Kuibyshev district, Rostov region, used for growing corn in the application of drip irrigation from watercourses. This article provides a method of use of mining waste in the area of water treatment for drip irrigation systems, defined capital and operating costs for the implementation of the proposed method as compared to traditionally used water treatment methods in the art, the basic indicators of investment effectiveness of the proposed solutions. The results show a reduction in capital expenditure by 4.5%. Cost-effectiveness of the proposed method of water treatment is expressed in reducing the cost of farmed products on 7,4-11,9% compared to systems with sand and gravel filters, the cost of finished products for the draft version was 535 rubles. / P against 577.91 rub. / n for the base variant. Internal rate of return is determined by graphical methods, by identifying the zero total net present value at a different discount rate. The period for calculating the profit from the sale of the proposed solutions, taking into account operating costs, increasing the value of the conditional inflation is assumed to be five years, including a year zero, in which the capital costs were realized. Studies suggest that the use of the proposed option will provide the preparation of natural water yields of 15-20%, depending on the risk events, with the traditional version of the drip irrigation system will bring 5-10% of net profit. The profitability of the proposed design solutions supported by exceeding the values obtained the general rate of discount (0,31) for all construction projects, adopted by Russian Ministry of Construction for making preliminary decisions on the implementation of investment projects (0,15).