Modeling of regeneration process of oil contaminated quartz sand with water solution of natural surfactant in vibratory fluidized bed

Abstract

The development of new and modernization of existing technological systems aimed at increasing the efficiency of treatment of surface storm water and industrial wastewater is an important area. Since individual objects are connected to each other in wastewater treatment systems, a change in the operation parameters of one of them will affect the others. For example, carrying out the correct effective regeneration of the quick filter, selected for a certain grade of filter material and the type of pollution, will relieve the work of the treatment plant as a whole. The actual direction is the introduction of environmentally friendly technical solutions and technologies. Therefore, special attention is paid to a natural surface-active substance (surfactant), which can be used as an active substance in a regenerating solution. The process of regeneration of an oil-contaminated sample of silica sand with a surfactant solution in a vibrated fluid bed is studied. Simulation of water flushing was achieved using an experimental setup with a vibrodrive. A quartz sand sample was taken from the quick filter of the Kotlyakovo-Kolomna group facilities of the Promotkhody waste facility after it was flushed. As an active component of the regenerating solution, a substance of natural origin, gum arabic polysaccharide, which has high surface activity against oil-fat deposits, was chosen. The concentration of gum arabic in the regenerating solution was chosen at the level of 1%. The results of the influence of the frequency and amplitude of vibrations on the regeneration process are obtained. To assess the effectiveness of the regeneration process, a dimensionless simplex is proposed, which is the ratio of the volumetric weighing force to the force of vibrations. A high degree of regeneration of a quartz sand sample in a fluidized bed is shown.