微气泡臭氧工艺在制药废水中的处理效果研究

Research on the treatment effect of microbubble ozone process in pharmaceutical wastewater

臭氧是一种常用的污废水氧化剂,多用于污水深度处理中。然而,目前常用的臭氧工艺存在接触不充分、利用率低等问题。拟在传统的臭氧工艺上进行优化,采用微气泡新型投加方式,提高处理效率。同时,将微气泡臭氧氧化作为预处理工艺,为后续生物处理工艺提供优质碳源。本研究以制药废水为试验材料,考察了不同臭氧投加浓度下废水中COD、BOD等污染物浓度及分子量的变化,分析了微气泡臭氧预处理对提升制药废水可生化性的可行性。试验结果显示,微气泡臭氧工艺对该制药废水有较好的处理效果,且相比于常规臭氧工艺,若将微气泡臭氧工艺作为预处理工艺,通过本次试验可以看出反应在20min左右时,分子量即可达到一个理想的效果,可对进水污染物进行调质,将高分子有机物减量化、小分子话、单一化、同质化,更有利于后续生物段的微生物处理。

Ozone is a commonly used sewage oxidant,which is mostly used in advanced sewage treatment.However,the commonly used ozone process has problems such as insufficient contact and low utilization rate.This study intends to optimize the traditional ozone process and adopt a new dosing method of microbubbles to improve the treatment efficiency.At the same time,microbubble ozone oxidation is used as a pretreatment process to provide high-quality carbon sources for subsequent biological treatment processes.In this study,pharmaceutical wastewater was used as the experimental material to investigate the changes in the concentration and molecular weight of pollutants such as COD and BOD in wastewater under different concentrations of ozone,and to analyze the feasibility of microbubble ozone pretreatment to improve the biodegradability of pharmaceutical wastewater.The experimental results show that the microbubble ozone process has a bet ter treatment effect on the pharmaceutical wastewater,and compared with the conventional ozone process,if the microbubble ozone process is used as a pretreatment process,it can be seen from this experiment that the reaction time is about 20 min,the molecular weight can achieve an ideal effect,and the influent pollutants can be conditioned and tempered,and the macromolecular organic matter can be reduced,small molecules,singulated,and homogenized,which is more conducive to the subsequent microbial treatment of biological segments.