改进型生物接触氧化反应器内实现短程脱氮的实验研究

根据短程硝化反硝化生物脱氮的理论要求及生物接触反应器的工艺特性,对传统的生物接触氧化反应器进行了结构与水流流态的改进,在改进后的反应器中,利用人工含氮废水,进行了常温下短程脱氮的可行性与工艺条件的探讨.试验结果表明:在常温(20~25℃),弱碱性(pH=8),低碳氮比(C/N=3)的条件下,控制适当的溶解氧浓度(M(DO)=1.0~1.5 mg/L),可有效地实现短程脱氮的目的,亚硝态氮积累率可达70%~84%,氨氮的转化率在80%以上,说明利用生物接触氧化反应器进行短程脱氮是可行的.

Experimental Study on Realizing the Shortcut Denitrification in an Improved Biological Contact Oxidation Reactor

According to the shortcut denitrification theory and the operational characteristics of biological contact oxidation(BCO),some improvements in both constructure and fluid condition are made in a traditional BCO reactor,and then the feasibility and performance parameters of shortcut denitrification are examinated experimentally on the improved reactor at normal temperature for an artificial waste water.The results show that at temperature of 20～25 ℃,pH=8,C/N=3,shortcut denitrification could be realized satisfactorily by controlling the concentration DO at 1.0~1.5 mg/L.At that time the accumulation rate of nitrite is to 70%~84%,and the transform rate of amino-nitrogen is above 80%.The experiments confirm that the shortcut denitrification in an improved BCO reactor is practicable,the features and advantages of the two processes are compatible.