The Effect of Heat Treatment on the Properties of Excess Activated Sludge

A literary analysis of the ways of processing excess activated sludge from sewage treatment plants has been carried out, promising ways of its disposal have been identified. The composition of the research object was considered, as which the excess activated sludge of the treatment facilities of JSC Slonimsky Cardboard and Paper Plant “Albertin” was used. The effect of heat treatment of excess activated sludge at 105 °C, 250 °C and 350 °C on its properties has been studied. The curves of differential thermogravimetric analysis and differential scanning calorimetry of excess activated sludge are obtained. The dependence of the change in the mass loss of the activated sludge sample when heated to 900 °C in an air environment on the drying temperature is determined. IR spectra of activated sludge dried at 105 °C and 350 °C were also obtained. The influence of the drying temperature of activated sludge on the change in surface characteristics and pore distribution has been studied.