Experimental research of microwave pyrolysis about paper mill sludge

A new method, microwave pyrolysis, has been investigated to dispose the paper mill sludge. Microwave pyrolysis is a new fast pyrolysis technology for biomass. The effects of various different factors on paper mill sludge’s microwave pyrolysis were mainly discussed. The results showed that the mass of the paper mill sludge reduced very rapidly within the first 6 min and then flattened out with the microwave reaction time increasing; The greater the microwave power was, the faster the sludge’s pyrolysis and the more the smell and concentration of diesel smoke was; The pyrolysis performance was better when the dosage of the paper mill sludge was increased and of 5% NaOH was added as microwave absorbers; Under CO2 atmosphere, the pyrolysis performance was the best when of 5% NaOH was added, while under N2 atmosphere, the pyrolysis performance was the best when of 5% ZnCl2 was added.