压力式接触氧化法处理农药废水的动力学研究

Dynamic Research on Pesticide Wastewater by Pressurized Bio-Contact Oxidation Process

目的研究压力式接触氧化法处理农药废水的动力学原理,推导并验证其动力学模型.方法根据亨利定律、双膜理论、物料衡算等经典理论,运用线性回归法拟合压力接触氧化法处理农药废水的有机物降解模型和微生物增殖模型并确定相关参数.结果上述两模型的关键参数均在各自规定的范围内,表明压力式接触氧化法处理农药废水是高效可行的.在有机物降解模型中,有机底物的最大比降解速度(vmax)保持在较高的水平,使有机污染物得以快速有效地去除.在微生物增殖模型中,微生物产率系数(Y)偏低,实现了污泥减化量的目的,降低了污泥处理费用和生产的处理成本.结论针对农药废水处理问题提出了合理可靠的动力学试验模型,进一步深化了对压力式接触氧化法去除污染物的机理认识,为该工艺处理高浓度农药废水的推广应用提供了参考.

The paper performed the theory research on pesticide wastewater by pressurized bio - contact oxidation process as well as deduced and validated the reasonable dynamic models. According to the classical theory including Henry Law, Lewis ＆ Whitman Theory, Equilibrium Account, linear regress method was applied to fit the organism degradation model and the microbiology multiplication model, and then confirmed the relative parameters. Owing to the vital parameters of the two studied models in the regular range, pres- surized bio - contact oxidation process could be considered as an effective measure to treat the pesticide wastewater. In the former model, maximum ratio degradation velocity of organism （Vmax） is kept the higher level to make organism pollutant remove rapidly; in the latter model, production ratio coefficient of organism （Y） was on the low side, which implemented purpose of sludge deduction and reduced the sludge treatment cost and production expense. The studied dynamic models make the effect mechanism of removing pollutant by pressurized bio - contact oxidation process understood compreh ensively and further offered the powerful reference to apply this technology in the industry field.