不同方式实现短程硝化反硝化生物脱氮工艺的比较

Comparative studies on shortcut nitrification-denitrification biological nitrogen removal technique realized in different pattern.

采用序批式活性污泥法(SBR),以实际豆制品废水为处理对象,比较了控制温度(T=31(0.5℃)、溶解氧(DO=0.5mg/L)和pH值(7.8～8.7)3种途径实现短程硝化反硝化生物脱氮工艺.结果表明,无论从硝化速率、硝化时间、污泥沉降性能以及生物相上,控制溶解氧实现的短程硝化反硝化脱氮工艺均不如其他2种工艺.就该工艺存在的问题从活性污泥法反应动力学和微生物相上进行了理论探讨,3种途径实现短程硝化反硝化生物脱氮工艺在实际工程应用中均不同程度地存在一些问题.

Three ways of controlling temperature (T=310.5℃), DO (DO=0.5mg/L) and pH value (pH=7.8~8.7) for realizing the shortcut nitrification-denitrification biological nitrogen removal technique adopting sequencing batch reactor (SBR) with soybean wastewater as treating object were compared. The shortcut nitrification-denitrification nitrogen removal technique realized with controlling DO was not as good as the other two techniques by means of comparing nitrification rates and time, sludge settling property and biofacies. And some problems existed in the technique was explored in theory according to active sludge reaction kinetics and microbe biofacies. There exited some problems of different degree in actual engineering application of biological nitrogen removal technique realized in these three ways.