Фильтрующие материалы для очистки ливневых водостоков от нефтепродуктов

Abstract

Suspended solids and oil products are considered as the most important pollutants in the storm water. As suspended solids can be easily retained from storm water by simple sedimentation, for oil products it is usually needed to have a secondary treatment: filtration through sorbents media. The experimental research of the zeolits ability of removal of oil products from water was carried out in the laboratory of Water Supply and Management Department of Vilnius Gediminas Technical University. Two experimental models were arranged for this purpose. For experiments there were used the zeolit grain fractions of  2,5-3,0 mm;  1,5-2,0 mm;  0,63-1,0 mm size. As it seen from results of investigations, the best adsorption was reached in the filter fillings with zeolit grains of  0,63-1,0 mm size. After the reconstruction of laboratory model the investigation of synthetic sorbents as filtration material for stormwater went on. Although storm water filtration through a sorbent filter gives high treatment efficiency, it is usually impossible to ensure the right speed of storm water coming to the treatment facilities (it is usually too high to ensure an efficient sorption). For this reason the research and analysis of three different synthetic sorbents („Fibroil“, „Duck“, „Reo-dry“) were performed in the laboratory under extreme conditions (filtration speed 30 m/h). According to the results of the experiment, all three sorbents have similar treatment efficiency, but “Fibroil” is suitable for filtration under 30 m/h speed 6 times longer than “Duck” and 13 times longer than “Reo-dry”.