Department of Environmental Engineering, University of Science and Technology Beijing, Beijing, China.
Water Environ Res. 2010 Jul;82(7):657-65. doi: 10.2175/106143010x12609736966522.
A novel microbubble air/ozone floatation device, TCRI, was developed to enhance the combination of the coagulation and ozonation processes as the pretreatment of landfill leachate. In the coagulation process, microbubble floatation reduced the coagulant dosage. The removal efficiencies of chemical oxygen demand (COD), color, nitrate, and ammonia for the coagulation microbubble floatation were 97, 20, 47, and 163% higher, respectively, than those of the coagulation-sedimentation process; in the ozonation process, the removal efficiencies of ammonia and COD in microbubble ozonation were increased by 300 and 200%, respectively, compared with a conventional ozonation contactor when the ozonation time was 60 minutes. The results showed that microbubbles could reach a higher ozone-transfer rate (microbubbles = 0.3018 min(-1) > conventional ozone bubbles = 0.2014 min(-1)). Therefore, the application of the microbubble technology in the coagulation and ozonation combination process may provide an effective and low-cost approach for wastewater treatment.
一种新型的微泡气/臭氧浮选装置（TCRI）被开发出来，以增强混凝和臭氧氧化过程的结合，作为垃圾渗滤液的预处理。在混凝过程中，微泡浮选减少了混凝剂的用量。与混凝沉淀工艺相比，混凝微泡浮选对化学需氧量（COD）、色度、硝酸盐和氨氮的去除效率分别提高了 97%、20%、47%和 163%；在臭氧氧化过程中，当臭氧氧化时间为 60 分钟时，微泡臭氧氧化对氨氮和 COD 的去除效率分别比传统臭氧接触器提高了 300%和 200%。结果表明，微泡可以达到更高的臭氧传递速率（微泡=0.3018 min（-1）>常规臭氧泡=0.2014 min（-1））。因此，微泡技术在混凝和臭氧氧化组合工艺中的应用可能为废水处理提供一种有效且低成本的方法。
