Research Of The Resource Processing For Sludge And Biomass

The sewage sludge had been investigated by the element analysis, infrared and thermo gravimetric analysis. The calorific value of sewage sludge was calculated by Auto-calorimetry instrument. The yields and the property of the sludge pyrolysis product under different heating rates, different pyrolysis time and different final pyrolysis temperatures were studied in experiment. The experimental findings showed that increasing pyrolysis time and higher final pyrolysis temperature could make the further pyrolysis for sludge. The pyrolysis product of sludge could easily decompose, So in reactor, the yield of pyrolysis oil of sludge would increased with more proportion of light oil in total product mass at constant temperature (500℃) for proper pyrolysis time (40 min).Three activated carbons were prepared from corn stalk, pine, poplar used CO2 as activating agent and had been modified by liquefied petroleum gas at 900℃.The primary properties of activated carbons before and after modification were investigated by nitrogen adsorption isotherms and FT-IR techniques. The adsorption capacity of activated carbon for benzene and ammonia in gaseous phase and organic dyes, iron ion in liquid phase were also studied. It showed that when these activated carbons were modified by liquefied petroleum gas, the content of micropore less than 1 nm was significantly decreased. The adsorption data presented that the adsorption capacity of benzene and ammonia in gaseous on activated carbons were mainly determined by the total pore volume. In liquid phase, organic dyes with large molecular size could only be adsorbed by activated carbon with pore size large than 1 nm. The adsorption of iron ion was dependent on the surface chemical property, indicating less relation with the pore volume. The results of adsorption kinetics showed that a majority of samples'adsorption processes follow a pseudo second-order kinetic rate equation. After modified by liquefied petroleum gas, the adsorption mechanism of samples could be changed, and this change did not associate with the raw materials.