Process Study For Anaerobic Digestion Of Penicillin Bacterial Residue For Biogas Production

With the rapid development of the Chinese pharmaceutical industries thenumber of antibiotic residue produced by bacteria can’t be ignored, however thedisposal of penicillin residue has become a bottleneck problem which led to limitingthe development of the pharmaceutical industry, in this thesis the biodegradationcharacteristics from bacteria to penicillin residue biogas production were researchedusing the anaerobic fermentation system, several basic factors of penicillin bacteriaanaerobic fermentation residues were investigated, then several tests was compiledusing semi continuous reactor USR to optimize the operating parameters of thereactor, finally the feasibility of the combining the nitrogen struvite crystallizationwas explored, the main results are as follows:First of all,the production of cumulative gas and the reaction system were doneunder the temperature of (35℃) using anaerobic fermentation method; the solidratio of cumulative gas production by the anaerobic feremenation is8%, the largestgas production can volatile solids when the coverage was0.6, the largest cumulativegas production reaction system coverage was0.7, the disposal of materials needsthe greatest consideration due to the gas production from the volatile solids unit, theused vaccination rate to intermittent the anaerobic fermentation was0.7with N ratioof15, the cumulative gas production reaction system was at its bestï¼›Then,the operational phase of the primary reactor, the bateria slag to theproduced starch mass ratio is5to1which is used to create a liquid feed for thepreparation of the subsquent tests to the bioreactor. When the daily quantity ofbacteria of slag is3g and starch15g（10.00g bacteria of slag/L då'Œ2.00g starch/L d） at normal reactor operation when the average of daily gas production is3500mL/d, pH value become stable at appoximilty7.5fluctuations, the compostion ofvolatile acid is based mainly on actetic acid and the total volatile acid concentrations below3500mg/L with no acid suppresion, the cod content wasfound to be about3200mg/L the alkalinity values up to8000mg/L,approximatemethane content of60%, the nitrogen content was increased from1000mg/L to1700mg/L;the dialy feeding amount of residue is4g bacteria slug when strach is at20g in this case the reactor couldn’t operate properly, and the produced materialcouldn’t be used in a timely manner, but the reaction system materials degradablepoint can determine the limit of the feed load which is approximitly between3g and15g starch residue and bacteria,due to these results;Finally,the previous stage of anaerobic bacterial residue supernatants were usedin the experiments to collect the struvite precipitation, the final conclusion asfollowing: the optimum preconception of ph denitrification was9.5when thereaction time is10min and the appropriate P: N molar ratio is1:1and the Mg:Nmolar ratio is1:1.The supernatant return flow DE nitrification method were usedoutside the reactor system, the gas production from the reactor was stabilized at3300mL/d, the ph rate of the reactor were stabilized at7.1and the ammonia contentfluctuation at1600mg/L also the methane gas content was stabilized atapproximately63%, in the end the described usage of the supernatant of the treatedstruvite in the DE nitrification reactor is found to be feasible.