INFLUENCE OF THE DEGREE OF SEASONAL FLUCTUATIONS OF SELF-PURIFICATION OF WATER OF JEYRANBATAN RESERVOIR ON THE PROCESS OF WATER TREATMENT BY ULTRAFILTRATION METHOD

In the spring months, due to the strengthening of biofouling on the components of water treatment systems of Jeyranbatan ultrafiltration units, a number of problems are observed, that significantly and negatively affect the entire process of water treatment. From April to July, both on the surface of the 200-micron filters of the preliminary clarification stage and on the surface of ultrafiltration membranes, there is an intensive growth of biomass in a short time, which leads to the almost complete halt of the water treatment process. This, in turn, leads to a forced increase in the number of backwashes with hydrochloric acid, alkali, and sodium hypochlorite solutions, which negatively affects the cost of clarified water and leads to a decrease in the profitability of the entire water treatment process. Along with this, the forced increase in the number of backwashes contributes to the accelerated destruction of both the ultrafiltration membranes themselves, and individual units of the entire water treatment system. Our research has revealed that the main reason for the increase in the intensity of biofouling at the components of Jeyranbatan ultrafiltration units is the seasonal variability of water microflora in the Jeyranbatan reservoir, which, in turn, negatively affects the processes of biological self-purification of the reservoir. The purpose of this article is to show the importance and ways of studying the degree of the biological self-purification process of a water supply source, before designing water treatment and water supply systems.