Green bio-oil obtained from digested sewage sludge: new substitute bio-fuel to diesel oil in thermoelectric plants

This study aims to take advantage of the residual sludge generated in sewage treatment plants (STP) for production of bio-oil fuel in order to apply it in thermoelectric plants by reducing the impacts on power generation. The sewage sludge was subjected to the process of pyrolysis in a fixed-bed reactor for the production of bio-oil. The average of yield of bio-oil was 10.52-18.38% (m/m). The analysis of bio-oil showed pH 8.35, density 0.97 g cm-3 and higher calorific value 32.36 MJ kg-1, the mixture 1:1 bio-oil/diesel presented calorific value 41.41 MJ kg-1 and density 0.94 g cm-3.