Effect of Thermal And Chemical Disintegratıon on The Enhance of Biogas Production in Waste Activated Sludge

Abstract

Sludge disintegration methods are pre-treatment methods applied to eliminate the hydrolysis phase, which is the rate limiting step in the decay process of wastewater sludge, to increase the degree of stabilization and the amount of biogas formed. In this study, the effect of different disintegration methods (thermal and chemical) on the solubility of the sludge was investigated by examining the changes in the dissolved chemical oxygen demand parameter. In the studies conducted within the scope of thermal disintegration, waste activated sludge is subjected to heat treatment in block heaters in closed tubes. In the case of alkali disintegration experiments, NaOH was added such that the waste activated sludge pH was 10 and 11.As a result of the study, biogas production was found 202.5, 189.8, 104 and 80.5 ml from thermal disintegration, alkaline disintegration, inoculum+raw sludge and inoculum sludge in a result of BMP test, respectively. Both of the chemical disintegration and thermal disintegration methods applied within the scope of the study have positively affected the efficiency of biogas. Thermal disintegration method seems to be more effective method in terms of biogas productivity.