污水再生处理雾化曝气臭氧氧化系统运行费用分析

Analysis on operation cost of the nebulized ozone aeration oxidation system in wastewater recycling process

雾化曝气臭氧氧化是利用近年来倍受关注的微米气泡将臭氧溶入水中的一项新技术。系统掌握雾化曝气臭氧氧化系统运行费用及其影响因素,对降低其运行成本具有重要意义。影响雾化曝气臭氧氧化系统工程运行费用的主要因素有臭氧投加量、臭氧气体浓度、气液比及循环泵过流水量等工艺参数,其中臭氧投加量和臭氧气体浓度的影响最大。在保证处理效果的前提下,减少臭氧投加量、提高臭氧气体浓度及加大气液比,是有效降低微米气泡发生设备运行费用的关键。研究结果表明,在其他条件相同的情况下,雾化曝气臭氧氧化系统的臭氧投加量需低于微孔曝气臭氧氧化系统的臭氧投加量30%～40%,其运行费用才有优势。

The nebulized ozone aeration oxidation process is one of the concerned new technolo- gies which use micro-bubble to dissolve the ozone into water. It is of great significance to cost re- duction to control the nebulized ozone aeration oxidation system operation cost and its influential factors. The major influential factors on nebulized ozone aeration oxidation system operation cost in- clude ozone dosage, ozone gas density, ratio of gas to liquid, and recycling pump flow rate. Among them, the ozone dosage and ozone gas density have more effects. On the premise of treatment per- formance security, the methods of reducing ozone dosage, increasing ozone gas density, and impro- ving ratio of gas to liquid were key factors to effectively reduce the micro-bubble production equip ment operation cost. The study results showed that, when the other operation conditions were the same, the ozone dosage of the nebulized ozone aeration oxidation system should be kept 30%--40% lower than that of micro-poreozone aeration oxidation system to get an advantage on operation cost.