Sludge was conditioned with Fenton's reagent(Fe2++H2O2)

CaO and coal

followed by deep dewatering. Seven factors

including four conditioner components

temperatures

flow rate and moisture

were studied by using Plackett-Burman(P-B) experimental scheme method. The results show that six factors had influences on sludge pyrolysis except for H2O2. Among them

temperature exerted the most significant effects. High temperature was favorable for combustible gas generation while fast flow rate decreased the gas yield. In addition

CO and H2 production could be improved by the presence of CaO

coal and moisture. Conditioner CaO and coal promoted the combustible gases generation from sludge

which was more efficient than physical mixture of sludge and CaO or coal. For generation of combustible gas the internal residual moisture in sludge was more effective than free water

which was significantly influenced by temperature. In conclusion

deep dewatered sludge pyrolysis has some advantages for generation of combustible gas.