Optimalizace environmentálních vlastností kalů z ČOV přídavkem aditiv

Abstract

My diploma´s work is solving problems of sediments utilization for recultivation. Sediments for recultivation are using directly or as a one of the component in production of recultivated substrates. Recultivated substrates are usually approved as a product by proper certificated workplaces. Diploma´s work is deal with valuation the reasons of mobility risk items which infulencing sediments ecotoxicity and as next - monitoring of nutrients liberation. Sediment’s useful value for recultivation is infulenced by inherency organic carbon and nutrients in sediment. Nutrients liberation to underground water could infulence eutrofization on recultivated land by undiserable way. Even if contents of risk items are corresponding with legislative limits for content of items in solids the hygienisation is the reason of their height ecotoxicity. From the issues of this Diploma´s work results that in the process of hygienisation sediments by lime there is a significant leaching humates of metals (pH > 7.8), which can be one of the reasons of sediments ecotoxicity. The most significant infulence of leaching risk items by the infulence of pH was authenticated in Nickel. By adding sorbents as montmorillonit it is possible to decrease leaching eminently. As next there was demonstrated the infulence of sorbent to decreasing of leaching possibility in phosphates and melted organic carbon. At the amonnia ions the adding of sorbent was not documentated.