sažetak izlaganja sa skupa
Today, with the increase in population and the development of industry, the amount of wastewater that needs to be treated is growing globally. The biological treatment of wastewater, which is one of the most acceptable treatments due to its simplicity and economic viability, legs behind the activated sludge that must be disposed appropriately. There are various ways of treating activated sludge, such as mechanical, biological and physical processes. Composting is a natural biological process that is carried out by various natural microorganisms, including bacteria and fungi that utilize solid waste as an energy source and break down organic material into simpler substances. The aim of this work was to investigate treatment of activated sludge by composting process. Activated sludge (AS) was mixed with biowaste (BW) in ratio, AS:BW = 1:2.5, and the structural material was added. The composting process was carried out in adiabatic reactor with working volume of Vr = 10 L during 16 days and the following parameters were monitored: temperature, CFU, C/N ratio, moisture content, volatile matter content, substrate and condensate pH, condensate volume, evolved CO2 and NH3 and conversion was calculated. The maximum achieved temperature was 58°C and thermophilic phase lasted 4 days. The cumulative evolved CO2 was 344.42 g kgVM0-1 and NH3 was not detected. At the beginning of process pH value was 6.2 and at the end 8.5. The obtained conversion was 42 %.
Composting process, Activated sludge, Biowaste, Adiabatic reactor
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