DETERMINATION OF THE CONTENT OF NUTRIENTS IN LIQUID ANIMAL WASTE
Kolesnikova T.A. | Kulikova M.A. | Volchek A.
The results of studies of the content of nutrients in liquid livestock waste are presented. Liquid waste resulting from intensive livestock farming has a negative impact on the environment. Nitrogen and phosphorus compounds in waste from pig farms pollute the soil and water bodies. It is important to find possible ways to selectively separate all valuable components – mainly nitrogen, phosphorus and potassium (NPK) – from liquid waste from pig farms, while ensuring the safety of the resulting products to promote the use of waste as secondary raw materials for the production of quality fertilizers. During the work, samples of the original pig farm sludge and sludge treated with coagulants were obtained in the form of powders. The quantitative composition of the elements was determined by recording the intensity of radiation with a certain energy. At the same time, the amount of nitrogen decreases from 8.59% to 3.57% due to its transition to the liquid phase during separation. The content of potassium and phosphorus increases, respectively, from 0.13% to 0.23% and from 0.87% to 4.1%, both due to the formation of salts that precipitate, and due to the additional introduction of these elements with the reagent (ammophos).
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