臭氧氧化6-APA制药厂生化处理出水的特性及动力学简

通过现场实验研究了6-APA制药厂生化处理出水的臭氧氧化特性及其动力学规律。结果表明，当臭氧浓度为27.5 mg/L，气水接触时间为80 min时，COD、UV₂₅₄、NH₃-N和色度的去除率分别可达72.95%、73.28%、72%和96.25%，达到《发酵类制药废水工业水污染物排放标准》（GB 21903-2008）排放控制要求。拟合结果表明，在0~10、10~30和30~90 min时段内，臭氧氧化过程遵循拟一级反应，但反应速率逐渐降低。当气水接触时间为30 min时，废水可生化性可由0.1提高至0.35，采用臭氧/生物处理的联合工艺也有望使出水达到相同的排放控制要求。

Ozonation characteristics and kinetics of bio-treated effluent from 6-APA pharmaceutical factory

The ozonation characteristics and kinetics of bio-treated effluent from 6-APA pharmaceutical factory were studied through field test. The results indicate that the removal rates of COD, UV₂₅₄, NH₃-N, and colority can reach 72.95%, 73.28%, 72%, and 96.25%, respectively when the ozone concentration is 27.5 mg/L, and the contact time between ozone and wastewater is 80 min, satisfying the emission control requirements of Discharge Standards of Water Pollutants for Pharmaceutical Industry of Fermentation (GB 21903-2008). The fitting results show that the ozonation reaction conforms to pseudo-first order reaction kinetics within the time intervals of 0 to 10 min, 10 to 30 min and 30 to 90 min, while the reaction rate decreases gradually. When the contact time is 30 min, the biodegradability of wastewater increases from 0.1 to 0.35. The wastewater is expected to meet the same emission control requirements when combined O₃/biotreatment technology is taken.