Key Laboratory of Experimental Marine Biology, Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China;University of Chinese Academy of Sciences, Beijing 100049, China;School of Environmental and Municipal Engineering,Qingdao Technological University, Qingdao 266033, China;College of Ocean Technique and Environment, Dalian Ocean University, Dalian 116023, China
Abstract: A plexiglass biological aerated filter(BAF) measured 60 cm in height and 10 cm in inner diameter had effective volume of 4 liter and composed of 64 annular hole plastic paddings with diameter of 2.5 cm and depth of 0.4 cm, efficient surface of 1200 m^2/m^3, with biofilm formation by recirculating water from turbot culture. The removal rates of total ammonia nitrogen(TAN) and NO2^--N from artificial simulation of mariculture effluent prepared by food remnants, excrement and feces were determined by the BAF exposed to different temperatures of 10, 15, 20, 25, and 30 ℃ regulated by a heater and pH values of 7.0, 7.5, 7.7, 8.0, and 8.5 controlled by addition of HCl and NaOH to evaluate the effects of temperature and pH on the nitrification of the biofilter. It was found that the removal rate of TAN and NO2^--N by the biofilters was increased with the increase in temperature from 10 ℃ to 25 ℃, with the maximal removal rate(0.793 1±0.023 1)mg/(L·h) of TAN at 25 ℃ and pH 7.7. There was higher removal rate of NO2^--N at 25 ℃ and pH 7.5 than that in the other groups, complete removal of NO2^--N in about 150 min. Moreover, accumulation of nitrite nitrogen(AOB), to some extent, was observed in all groups, higher with increase in temperature and pH value within water temperature of 10-25 ℃, and pH of 7.0-8.5. The findings indicated that the ammonia oxidative bacteria(AOB) was more adaptable to the changes in ambient temperature and pH value compared with the than nitrite oxidative bacteria(NOB), which can provide a reference for the further study and application of biological aerated filter.
徐建平, 赵越, 李贤, 张延青, 刘鹰. 温度和pH对海水曝气生物滤器硝化性能的影响[J]. 大连海洋大学学报, 2019, 34(4): 558-565.
XU Jian-ping, ZHAO Yue, LI Xian, ZHANG Yan-qing, LIU Ying. Effects of temperature and pH on nitrification in a seawater biological aerated filter. Journal of Dalian Ocean University, 2019, 34(4): 558-565.
2019, Vol. 34 
