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Bio-Fuels and Bio-Char Production from Pyrolysis ofSewage Sludge

The limited reserves of fossil fuels along with the environmental concern about green-house gases have led to the search for new energy sources. Biomass offers a sustainable and renewable energy system. Sewage sludge, a residue generated in wastewater treatment plants, is one of the environmental problems in industrialized countries. Its contents of volatile matter represents a valuable resource, a possible reuse is the conversion into fuels by means of pyrolysis that yields gas, bio-oil and biochar. The composition and heating value of the gas makes it suitable for use as a fuel. The bio-oil may be evaluated as an environmentally-friendly green biofuel. The biochar product is carbon-rich and a potential solid biofuel. Other ways it might be used as a C and N source in soil amendment.