Influence of additive materials on the properties of sediments of oily waste water from agricultural machinery plants

The results of researches of filler materials (do-lomite and vermiculite) influence on the properties of sediments of oil-containing sewage of plants of agricultural mechanical engineering are presented in the study. The research objective was the opti-mization of processing of sediments of oil-containing sewage dolomite and definition of an optimum dose of vermiculite for improvement of water return of sediments. Studying the structure and composition of dolomite was carried out carry-ing out the X-ray phase analysis on the D8ADVANCE diffractometer and the thermogravi-metric analysis on NETZSCHSTA 449 F1 devices, and also methods of mathematical statistics with use of packages of applied programs were used. Technological process of conditioning of sediment of oil-containing sewage at use of filling materials of dolomite and vermiculite for change of its structure, and, therefore, the improvement of the water giving propertieswas studied. The contents and structure of dolomite was defined by the X-ray phase and thermogravimetric analysis. The mathematical model of processing of sediments received by do-lomite and adjusting charts for minimization of es-timated criteria and the subsequent automation were constructed. Optimum values were deter-mined by a vermiculite dose. The thermogravimet-ric analysis allowed studying structure of the initial sediments and sediments processed by vermiculite. It is stated that processing of sediment vermiculite allows reducing the specific resistance of filtration by 3.5 times at addition of an optimum dose of 110 mg/dm3 explained by change of the structure of sediments allowing to create a rigid skeleton on the filtering partition leading to increase in speed of a filtration and improvement of conditions of office of the dehydrated sediment. When processing a sed-iment of oil-containing sewage dolomite the specific resistance of sediment of filtration decreases by 6 times, and vermiculite - 3.5 times allowing to in-crease the productivity of the dehydrating devices and to lower operational expenses.