Research On Pyrolysis Technology Of Terramycin Bacteiral Residue

Terramycin bacterial residue is solid waste generated in the process of antibioticproduction, and processed into animal feed or feed additives after dried in the past. Thereis a variety of security risks that bacterial residue as the feed, because of that lead to drugresistance easily and without making safety trials, so it was included “prohibit varietiesdirectory of the use of drugs in feed and animal drinking water” in2002, Terramycinbacterial residue processing has became prominent problem increasingly.Terramycin bacterial residue as raw material was used in this paper, to study thefeasibility of dealing with bacterial residue by pyrogenation. first of all, raw materialchemical composition was determined using the elemental analyzer, atomic absorptionspectrophotometer, X-ray spectrometer, high performance liquid chromatography. At thesame time the content of harmful substances including heavy metals, polycyclic aromatichydrocarbons were determined, to help for the use of bacteria residue. Characteristics ofthe bacteria residue thermal analysis was soluted with TG-DTA, and the pyrolysis kineticsof terramycin bacterial residue was studied with Coats-Redfem. the impact of the finalpyrolysis temperature. Heating rate, particle size on the pyrolysis products were discussedand characteristic of pyrolysis products was analysed. preparation of activated carboncoupling of pyrolysis and activation method and its characterization was described.In this study, elemental analysis results show that C and O with higher levels ofbacteria residue, most of the substances in the bacterial residue is volatile obtained by theindustrial analysis, that reached more than65%, but lower moisture content, so suitablefor the pyrolysis. The pyrolysis process is divided into three phases, water precipitationphase, volatiles precipitation phase and carbonation phase, the main stage was phase two,pyrolysis temperature range roughly was220-800°C, the weight loss rate of75%.The final pyrolysis temperature has a greater impact on the pyrogenation. Volatilematter exhalation and pyrolysis oil yield were Increased with the reaction temperatureincreased, when the temperature reaches450°C, the yield was41.67%, coke graduallydecreased with increasing temperature, at temperatures less than450°C, decreased rapidly,and then decline tends to steadily. The influence of heating rate on the pyrolysis process isnot very big, especially at lower temperatures. Particle size on the pyrolysis did notsignificantly, pyrolysis liquid yield had a downward trend and the yield of residual carbonhad an upward trend with increasing particle size. The content of C-element is very high, reaching52.93%in the oil phase, much higherthan the14.00%of the aqueous phase, the main ingredients are soluble in water, pyridine,piperazine, and low-carbon number of nitriles and ketones in water phase. nitriles,piperazine, pyridine, pyrrole, hydantoin are organic with nitrogen element, so a highcontent of N elements in the water phase. In addition to the ingredients contained in theaqueous phase，phenols, indole, and the number of high-carbon nitriles are contained in oilphase. So carbon content in the oil phase is much higher than the water phase. Pyrolysisliquid moisture is high, especially in the aqueous phase is up to65.09%, even in the oilphase moisture content is up to14.16%. The high viscosity of the oil phase is6397mpa·s,the water phase only362.5mpa·s.The optimum conditions for preparation of activated carbon by pyrolysis is thatactivator is K2CO3, activation ratio is1:3, the activation temperature is500°C, and theactivation time is2h. Mycelium activated carbon is prepared under optimum preparationconditions, the iodine adsorption value of594.89mg g-1, specific surface area of518.73m2g, activated carbon production rate was53.25%,29.20%of the yield of pyrolysis oil.