论文部分内容阅读
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。
Ozone oxidation characteristics and kinetics of biochemical treatment effluent of 6-APA pharmaceutical factory were studied through field experiments. The results showed that the removal rates of COD, UV254, NH3-N and chromaticity reached 72.95%, 73.28%, 72% and 96.25% respectively when ozone concentration was 27.5 mg / L and gas-water contact time was 80 min Emission Control Requirements for “Emission Standard of Fermented Pharmaceutical Wastewater Industrial Water Pollutants” (GB 21903-2008). The fitting results showed that in the period of 0 ~ 10, 10 ~ 30 and 30 ~ 90 min, the ozone oxidation followed the pseudo first order reaction, but the reaction rate decreased gradually. When the contact time of gas and water is 30 min, the biodegradability of wastewater can be increased from 0.1 to 0.35, and the combined ozone / biological treatment is also expected to achieve the same emission control requirements.