Study On Efficient Treatment Technology Of Fermentation Pharmaceutical Wastewater

A large amounts of high-concentration organic wastewater that pollutes the environment will be produced during the production process in the fermentation pharmaceutical industry.The above wastewater featured with massive water,complex components and high pollutant content is called one of the hardest industrial wastewater to treat.The research task is proposed in the process of conducting the clean production audit on a state-owned pharmaceutical factory whose fermentation-based pharmaceutical wastewater will be taken as the research object.By preferentially removing the SS,the COD content in the wastewater,the process system load,the process running time and wastewater treatment costs will be reduced respectively to achieve efficient treatment of fermentation pharmaceutical wastewater.1.In the experimental study on the treatment of wastewater SS and COD through coagulation technology,the treatment effects of wastewater by adding different types and dosages of coagulant and coagulant aids have been studied.The results showed that polyaluminum chloride is the best coagulant,and cationic polyacrylamide(ion content:30%)is the best coagulant aids.When the dosage of polyaluminum chloride was 0.12g/L,and the dosage of cationic polyacrylamide(ionage:30%)was 0.0016g/L,the treatment effect and cost performance of wastewater treatment were the highest.At this point,the SS removal rate was 79.99%while the COD removal rate was 33.01%.2.On the basis of adopting coagulation technology to settle the suspended solids in the wastewater,the tubular membrane filtration was used for efficient solid-liquid separation.During the experiment,the wastewater was subject to engineering commissioning through two tubular membrane equipment with different pore size of 0.1?m and 0.5 ?m respectively,the optimum dosages of the optimal coagulant and the optimal coagulant aids were added simultaneously,and finally the wastewater treatment and optimum process parameters of tubular membrane filtration equipment was determined.The results showed that the selection of tubular membrane with the pore size of 0.5?m was the most cost-effective way to filter wastewater,with the maximum water flux of the membrane being 3000L/m2/h,the minimum water flux being 2286L/m2/h,and the average water flux being 2679L/m2/h.The maximum sedimentation rate of treated wastewater reached 26%at 45 min,the SS removal rate of wastewater was 98.2%,and the COD removal rate was 43.65%.3.The improved wastewater treatment process of the state-owned pharmaceutical factory is as follows:grid ?conditioning tank ?coagulation sedimentation ?tubular membrane filtration ?hydrolysis acidification ?IC reactor ?two-stage A/O process?sedimentation tank ?decolorization tank ?the company's main discharge port ?discharge to the sewage plant in the industrial park.In wastewater pre-treatment process,the coagulation sedimentation method and the tubular membrane filtration method were adopted.The COD content in the wastewater was reduced by preferentially removing the SS.At this point,the influent COD content of the wastewater post-treatment process decreased from 9,875?11,850 mg/L to 5,565?6,677 mg/L,and the wastewater treatment load decreased by 43.65%,which greatly reduced the system pressure of the IC tower and the two-stage A/O process,shortened the process running time,improved the wastewater treatment efficiency,so as to guarantee that the discharging of wastewater can conform to the standard.The improved wastewater treatment process needs to build a new coagulation sedimentation tank and purchase a set of tubular membrane microfiltration system equipment with an investment of 500,000 yuan.The cost of coagulation sedimentation and tubular membrane filtration for the treatment of each kilogram of COD was 0.11 yuan to 0.13 yuan,far lower than 0.67 yuan to 0.80 yuan for treatment of per kilogram of COD by the original wastewater treatment process,which greatly reduced the cost of wastewater treatment economically,and the efficient treatment of fermented pharmaceutical wastewater would be realized.