The Study On Degradation Of Synthetic Pharmaceutical Wastewater's Organic Pullutants

The study has worked at the characteristics of synthetic pharmaceutical wastewater. Learned through experiments, it's difficult to degrade synthetic pharmaceutical wastewater with a single biochemical method (Anaerobic, aerobic), may even cause the sludge dead in the process. Taking into account the high amount of COD of the pharmaceutical wastewater and hard degradation, and the pretreatment can improve some advantages of wastewater as the biodegradability. The study discussed the degradation effect of synthetic pharmaceutical wastewater by electrolysis combine Anaerobic and Aerobic, and the study would work at the degradation effect of synthetic pharmaceutical wastewater under the combination uLtrasound- fenton reagent oxidation method with SBR program, and made a comparison test about the degradation effect of synthetic pharmaceutical wastewater under a simple method just as anaerobic, aerobic, electrolysis and ultrasonic.Through the pretreatment of synthetic pharmaceutical wastewater with electrolysis and ultrasonic, after the precipitation, take the supernatant to Bio-contact oxidation reactor for biochemical reactions. Compared the effects of synthetic pharmaceutical wastewater with single electrolysis, ultrasonic, anaerobic, aerobic, SBR method, the result shows that the biodegradability of synthetic pharmaceutical wastewater increased under electrolysis or ultrasonic treat, and wastewater COD was degraded more complete.The result of experiment shows that: The COD removal rate is only 32.5% when electrolyze the wastewater with pH value of 9 and current of 0.2A; the COD removal rate can be 32.9% when: first use ultrasound- Fenton oxidation treatment and add FeSO4 solvent of 24mg/L as well as 80mL H2O2 solvent of 30% with the pH value of 3. Then after 5 minutes, use the ultrasound cleanser to treat the wastewater with the adjusted pH value of 10 for 30minutes. When using anaerobic sludge process to treat synthetic pharmaceutical wastewater, the COD removal can reach to 72.56% after 36 hours with the temperature of 30℃; whereas using aeration process to treat synthetic pharmaceutical wastewater, the COD removal is 72.36% 24 hours later with the temperature of 25℃. When using electrolysis as pre-treatment and A/O in the following, 98.93% of COD can be removed; using ultrasound-Fenton oxidation as pre-treatment and SBR in the following, with 8 hours'aeration and 12 hours reaction, the COD removal can be 97.3% after being stewed for 4 hours.