Future quantities of sludge from wastewater treatment plant on the territory of AP Vojvodina

In the framework of the research, an assessment of the future amount of waste sludge that would be generated after the construction of the planned 200 waste water treatment plants (WWTPs) that should be built on the territory of Autonomous Province of Vojvodina in the Republic of Serbia was carried out. It is estimated that the annual production of waste sludge will be slightly more than 81 thousand tons (dry sludge) per year. The methods of sustainable use (circular economy of sludge) and the method of safe disposal of sludge resulting from wastewater treatment were also analyzed. Starting from the possible use in Anaerobic Digestion processes for recharging biogas, the residual sludge from Anaerobic Digestion is excellent for use in agriculture. Well-watered sludge can also be used in the cement production industry, or if the sludge is burned (to reduce the final amount of waste), the ash can be used in the construction industry for the production of bricks or concrete/mortar, and finally sludge has potential for possible use for recharging biofuel, bio-plastic etc. Finally, there is a real potential for the use of waste sludge in AP Vojvodina