SOLAR PYROLYSIS AND GASIFICATION OF THE SEWAGE SLUDGE - PRODUCED FUEL PROPERTIES ANALYSIS

Sewage sludge is considered as a biomass due to its biodegradability. Legal conditions in the European Union prohibit sewage sludge storage. Therefore, there is a need to develop thermal methods for sewage sludge treatment. The most common way to date has been combustion. However, this process has a lot of disadvantages associated primarily with environmental harmfulness and the immediate need to use the heat produced. Pyrolysis and gasification are considered the most promising methods of sludge management. They have many advantages over combustion. However, it is difficult to tell which method is more likely to be widely used. Therefore, the paper presents a critical comparison of the solar pyrolysis process and gasification in the fixed bed of municipal sewage sludge. The analysis of the process parameters and combustible properties of the gaseous fuels obtained was analysed.