Purification of Industrial Enterprises Wastewater from Petroleum Products Using New Granular Hydrophobic Sorbents

The authors propose to use the dried carbonate sludge of chemical water purification (CWP), Kazan CHP-1 as a sorbent of petroleum products. Oil capacity was assessed by its ratio to the most distributed TPS oil products in the wastewater: turbine oil, diesel fuel, gasoline, reduced fuel oil, and oil of the Shiiskoe deposit. The result of the studies show that, one of the disadvantages of the sludge as an oil product sorbent is its hydrophilicity. To obtain a hydrophobic sorbent as a slurry modifier, the GKZh-94M water repellent organic silicon liquid was used (136-157M, TU 6-02-691-76). To impart water-repellent properties to the sludge, its surface is hydrophobized. At hydrophobic treatment, the sorption capacity is increased 2.5-fold relative to the starting sludge. When using a hydrophobic finely dispersed sludge in dry bulk, a number of problems arise viz., there is a hydrophobic “plug”, and wall surface effect of the fluid flow occurs. It is possible to avoid these problems and to use the maximum sorption capacity of hydrophobic sludge in dry bulk filter by decreasing the bulk density, i.e. forming granules. Volumetric and surface hydrophobization of granules was investigated. Study was conducted to determine the effectiveness of purification of sorbents in the dynamic conditions, simulating the industrial adsorption filter. Purification efficiency was more than 98% and the concentration of petroleum products in the permeate was less than 0.1 mg/dm3. We investigated the physical and mechanical properties of local soils with the addition of waste sorbents. According to the results of the research, there is a beneficial effect of introducing a waste sorbent as a modifier in the fortified ground, consisting in the growth of frost resistance and tensile strength in bending.