Preparation Of Pyrolysis Oil And Activated Carbon By Pyrolysis Of Penicillin Slag

China is a major antibiotic producer and can produce and export a large amount of antibiotics every year.During the production of antibiotics,a large amount of fermentation residues are generated.These residues are often referred to as antibiotic bacterial residues.Antibiotic bacteria residue contains more water and residual antibiotics.If the antibiotic dregs cannot be disposed in time,accumulated antibiotic dregs will seriously pollute the air,water and soil,and pose a potential risk to animals and humans.At present,there are very few units that can safely and effectively treat antibiotic dregs.These units can only treat a small amount of antibiotic bacterial residue,and the cost of treating antibiotic dregs is relatively high.These problems have affected the treatment and disposal of antibiotic bacterial residue.How to effectively dispose antibiotic bacterial residue and be able to use the antibiotic bacterial residue in a resource-based manner is an urgent problem to be solved.In this paper,penicillin dregs are taken as the research object.First,the physical and chemical characteristics of penicillin dregs are explored.The research results show that the volatile content of penicillin slag is higher,and the organic matter in the bacterial residue is mainly composed of proteinaceous and fatty substances.These conditions are conducive to the utilization of bacterial residue.The dried penicillin slag has a higher heating value,and its heating value can reach 66% to 80% of the heating value of ordinary lignite.The horizontal pyrolysis furnace was used to pyrolyze penicillin slag,and the effects of pyrolysis temperature and pyrolysis method on the amount of pyrolysis products and the composition of pyrolysis oil were investigated.When pyrolyzing penicillin slags quickly at 400?,the yield of pyrolytic carbon is the highest.When pyrolyzing penicillin slags quickly at 600?,the yield of pyrolysis oil is the highest.When pyrolyzing penicillin slags quickly at 700?,the yield of gas is the highest.Pyrolysis oil contains acids,alcohols,esters,ketones,amines,benzenes,phenols,pyrazines,pyridines,indole and other substances.At different temperatures,the composition of the pyrolysis oil and its corresponding content will change.Hybrid catalysts were prepared using HZSM-5 molecular sieve and different metal nitrates,and the prepared catalysts were used to catalyze the pyrolysis of penicillin slags.These catalysts will affect the composition of the pyrolysis oil,improve the quality of the pyrolysis oil,and some catalysts can significantly reduce the nitrogen and oxygen content in the pyrolysis oil.Fe₂O₃/HZSM-5 can significantly increase the content of hydrocarbons,hydrocarbons mainly composed of alkanes,alkenes and alkynes.When using Fe₂O₃/HZSM-5,Zn O/HZSM-5 and Zr O2/HZSM-5 to catalyze pyrolysis of bacterial residue by layered catalysis,the nitrogen content in the pyrolysis oil is significantly reduced.When using Ag/HZSM-5,Co O/HZSM-5 When with Ni O/HZSM-5 to catalyze the pyrolysis of bacterial residue by mixed catalysis,it can also reduce the nitrogen content in the pyrolysis oil.Finally,the penicillin bacterial residue is activated with a chemical activator,and the activated bacterial residue is pyrolyzed in a pyrolysis furnace to prepare activated carbon.The activated carbon prepared by using K₂CO₃ to activate bacteria residue has a stronger ability to adsorb methylene blue than commercially available activated carbon,and this activated carbon has a higher specific surface area and pore volume.The effects of impregnation ratio,pyrolysis temperature and pyrolysis time on the preparation of bacterial residue activated carbon were investigated through single-factor experiments.The bacteria residue activated carbon was used to adsorb methylene blue,and the effects of adsorption time,temperature and p H on the adsorption performance of bacteria residue were investigated.