CAO Guang-bin1,CHENG Qi-yun1，2,HAN Shi-cheng1, ZHOU Xuan-yi1，2,JIANG Shu-yi1, CHENG Zhong-xiang1
1.Heilongjiang River Fisheries Research Institute, Chinese Academy of Fishery Sciences, Harbin 150070,China; 2.College of Enginering Science and Technology, Shanghai Ocean University, Shanghai 201306,China
Abstract: An ozone-ammonia reaction column was designed based on bubble fluids, including ozone bubbles’ motion, dissolution, diffusion, and dimension changes and was tested in a recycling system to remove ammonia as the principal nitrogenous waste released by fish in cold water fish culture. It was found that the ozone catalytc oxidation removed 54% of the ammonia in the water, and the reaction column showed well performance. Meanwhile, the monitoring by PLC on-line control system revealed that below 0.01 mg/L of the residual ozone was recorded in the culture water, which was accord with the safe range of 0.008-0.060 mg/L for freshwater fish culture. The findings indicate that the ozone-ammonia reaction column is characterized by reasonable structure and sufficient ammonia-ozone reaction.
2014, Vol. 29 
