Research On Anaerobic Treatment Of Lincomycin Hydrochloride Wastewater

Nowadays,the wastewater from the pharmaceutical industry is the difficult one to be treated among the various of industrial wastewater.The antibiotic production wastewater is the most polluted and most difficult one to deal with.This is mainly due to the high content of organic in the antibiotic production wastewater.The COD is usually in the range of 30000mg/L~100000mg/L.The wastewater is often left with incomplete extraction of antibiotics,and the toxic effect of microorganisms further increases the difficulty of the process.In this paper,the research is mainly concerned with anaerobic treatment of lincomycin hydrochloride production wastewater.The quality and quantity of the wastewater produced in each production section can be determined by analyzing the Production Process of lincomycin hydrochloride.Linfomycin hydrochloride production wastewater consists of five kinds of wastewater,including the first extraction wastewater,the third extraction wastewater,solvent wastewater,bacteria residue ultimate liquor and distillation ultimate liquor.First,dilute each single-row wastewater and adjust the pH to make sure that it is suitable for anaerobic treatment.Then,the five-part wastewater is subjected to anaerobic treatment for seven to twenty days.The results show that the anaerobic treatment effects of the first extraction wastewater and the distillate ultimate liquor are more obvious,the COD removal rate is 68% and 55%.The anaerobic treatment effects of the third extraction wastewater and the solvent wastewater are relatively poor,the COD removal rate is 40% and 25%.and the bacteria ultimate liquor is completely unable to carry out the anaerobic treatment.After the effect of each single-row wastewater in the anaerobic treatment is definite.Mix each single water in according with the ratio of the actual water condition and then take the treatment in sequence.In the results,the anaerobic treatment effects of the mixed wastewater are obvious,and the COD removal rate is above 65%.By analyzing the Production Process and the water quality and combining with these two treatments,the main factors influencing the anaerobic treatment effect of single-row wastewater are extractant X and titer(residual antibiotics).In order to assess the impact of the two factors on the anaerobic treatment,the single factor test is carried out by using the extractant X and the titer as the variable respectively.The results show that when the titer is less than 560μg/ml,it has little effect on the treatment;but when it is reaches 1190μg/ml,it can destroy the anaerobic biochemical of wastewater and invalidate the treatment.The anaerobic treatment effect of wastewater is not affected when the content of extractant X is below 1‰.When the content of extractant X in the wastewater reaches 1.5‰,the COD removal rate is decreased by 20% compared with the normal value.When the content of extractant X in the wastewater reaches 2‰,the COD removal rate is decreased by 40% compared with the normal value.After comparing the results of these two groups,it is found that the effect of titer is the whole process of anaerobic reaction with the killing effect of acid-producing bacteria and methanogens.Therefore,during the test,the anaerobic effluent VFA is always at a low level.And the content of extractant X has a measurable impact on the production of methanogenic bacteria,because the anaerobic effluent VFA has gradually increased with its content increasing.It indicates that the methane production process is inhibited,and the acid production process is not affected.From the above analysis,it can be seen that the anaerobic treatment of lincomycin hydrochloride production wastewater is mainly affected by extractant X and titer,so the IC reactor is designed by controlling the content of extractant X and titer.After the 96-day start-up,the IC reactor’s inlet volume reaches 4 kgCOD/(m3·d)and the COD removal rate is above 75%.This indicates that the key to initiating the IC reactor for the treatment of antibiotic production wastewater is controling the variables such as titer,extractant X and other factors affecting anaerobic treatment.