Study on Production of Hydrogen-rich Fuel Gas from Pyrolysis of Deep-dewatered Sludge Cakes Conditioned with Fenton's Reagent and Red Mud

摘要

Deep-dewatered sludge cakes were mechanically dewatered from sewage sludge conditioned by Fenton's reagent combined with red mud.And then pyrolysis experiments were investigated on the dewatered sludge cakes.The catalytic effect of red mud in the composite conditioners on the pyrolysis gas production of dewatered sludge cakes was firstly studied,and compared with sludge cakes conditioned with Fenton's reagent alone.The results indicated that the gas yield at 700,800,and 900℃ of deep-dewatered cakes conditioned with Fenton's reagent and red mud was much morehigher than raw sludge.According to the H2 yield,the dewatered cakes composite conditioned with Fenton's reagent and red mud generated more H2 gas yield than cake conditioned with Fenton's reagent alone.It indicated that the red mud could promote the generation of H2 and CH4 from catalytic decomposition of organics in sludge cakes more effectively.This study also explored the effect of moisture content on the syngas composition from pyrolysis of deep-dewatered sludge cakesand found that higher moisture content promoted more syngas yields with higher H2production.