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Gostishchev D.P., Khvatish N.V., Valiev D.S. - Ecological Problems of Environmental Protection by Sewage and Livestock Waste Irrigation |
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Written by Erkin Turdibaev
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Friday, 09 June 2017 |
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The aim of research was to study the problem of disposing sewage and livestock wastes produced in industrial livestock complexes while their volume increases due to industrial growth. Nowadays economically and ecologically justified methods of initial preparation of livestock waste and wastewater for their subsequent use on sewage farms for irrigation at fodder growing are emphasized as promising directions. The article presents the results of analysis on the basis of which it was found out that long-term application of livestock waste improves soil fertility: the proportion of humus has increased on average by 15 %, the degree of base saturation – by 3–7 %, the amount of phosphorus and potassium – by 2–3 times. Along with this, there is an increase of manganese, copper and nickel content, and activation of microbiological activity in soil. The implementation of the proposed technological solutions will reduce the negative impact on surface and ground water by 20–40 %; save the amount of clear water by 50 %; improve product quality on protein content by 2–3 %; cut down the expenses for manure and fertilizers application. It has also been found out in the course of empirical researches that such irrigated farms are self-sustained purification plants. The examined soil final treatment methods of livestock waste ensure a high degree of absorption and processing of organic and inorganic pollutants in them, due to the soil microflora, sun radiation and absorption by plant roots, as well as the soil self-purification from pathogenic microorganisms and helminthes eggs.
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