Mass and energy balances of sewage sludge pyrolysis in a lab rotary kiln

The aim of this work is to study the influence of the main parameters of sewage pyrolysis in a rotary kiln on the product distriburion and energy balances. An indirectly heated rotary kiln at a laboratory scale was used (4 kg/h). An increase in the final temperature causes the reduction of the total condensable products and the non-condensable gas fraction increases. The residence time of the volatile phase has an important influence on the secondary reactions to increase the non-condensable gas with low tars content. These results contribute also a valuable input to perform LCA.