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《CHONGQING ENVIRONMENTAL SCIENCE》 2000-05
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Nitrification during Startup and Restart of Biological System for Treatment of Source Water

Mei Xiang~1, Gao Tingyao~2 (1.State Key Laboratory of Pollution Control and Resource Reuse, Department of Environmental Science and Engineering, Nanjing University, Nanjing 210093; 2.School of Environmental Science and Engineer  
On the basis of the pilot-scale experiment, the nitrification performances of startup and restart of the biological contact oxidation system for treating slightly polluted source water have been investigated. The factors affecting startup of the treatment system have been studied, and ammonia-nitrogen removal performances between startup and restart have been compared. The research results showed that the rise rate of ammonia-nitrogen removal amount approximately reflected the logarithmic growth rate of nitrifying bacteria during startup and restart, and the rise rate of ammonia-nitrogen removal amount was the important measurement of startup and restart progresses. The duration of startup and restart was affected by water temperature, and the ammonia-nitrogen nitrification capacity achieved by the treatment system was affected by the air-water ratio. When the packing materials with grown biofilm was submerged in water, the adaptation period of nitrifying bacteria during restart was shorter than that during startup with biofilm formation on the new packing materials.
【CateGory Index】: X703.1
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