Abstract
In present time, there is no legal regulatory national document related to sludge management in Georgia, and the sludge removed from the treatment plant throughout the country is stored in the Wastewater Treatment Plants (WWTP) area after proper treatment (dewatering, drying). The purpose of our research was studying the limited and nutrients elements in the sludge generated at the WWTP and determine the optimal quantity/dosage for agriculture. Our studies have shown that the average values of seven heavy metals limited by the EU Directive do not exceed or only slightly exceed the established Limit Values and the annual maximum amount of sludge that can be used in the agricultural sector for 10 years is limited by the amount of zinc and is 68 092.06 kg/ha/year. Applying the specified amount of sludge to the soil primarily ensures its enrichment with the nutrient element – nitrogen.