[Study on bio-contact oxidation A/O process of Guanting Reservior water under low temperature].
The results of the experiments showed that biological contact A/O process could run steadily under low temperature and had better removal effect for ammonia nitrogen and had some removal effect for COD and TN from water of Guanting Reservoir. When the temperature dropped greatly, removal ratio of ammonia nitrogen dropped evidently, but gradually rose and remained at high removal level at last. Under the conditions of the experiment that the temperature was 0-5 degrees C and influent ammonia nitrogen was about 10 mg/L, ammonia nitrogen removal rate remained more than 95% at last. The change of temperature had no evident influence on removal effect of COD. And the conclusion could be got by microscope that under the temperature at 0-5 degrees C the microorganism in the biofilm still had a good activity.
Beijing Municipal Research Institute of Environmental Protection, Beijing 100037. xinga0011@sina.com
Xing-hai
XH
He
Jiang-jin
JJ
Wu
Li-chun
LC
Chang
Shu-jun
SJ
Wei
Jian-ming
JM
Ke
D001673:Biodegradation, Environmental; D002681:China; D003080:Cold Temperature; D009566:Nitrates / Q000032:analysis*; D010084:Oxidation-Reduction; D013696:Temperature; D014871:Water Microbiology; D014873:Water Pollutants / Q000032:analysis*; D018508:Water Purification / Q000379:methods*
D009566:Nitrates; D014873:Water Pollutants; C006568:ammonium nitrate