焦化废水生物脱氮研究

A Study on Denitrification of Coke-plant Waste-water through a Bioi(?)gical Process

本文通过小试及中试,对焦化疲水的生物脱氮处理进行了研究。研究结果表明,硝化菌的培养及驯化是生物脱氮顺利进行的关键,连续驯化方式优于间歇驯化方式,当水质波动不大,运行条件正常时,A-A/O系统可以实现98—99％的硝化效果和75％以上的除氮效果。厌氧预处理在其中起了重要作用。

In this study, a biological process for controlling the concentration of residual nitrogen in coke-plant wastewater was investigated on a bench scale and through pilot plant experiments. It is concluded that the cultivation and acclimationof nitro bacteria is the key step of biodenitrification process, continuous acclimation gave better results than intermittent operations. 98-99% of NH8-N and more than 75% of the total nitrogen could be removed using A-A/O system when the fluctuation of influent quality is low and the operation parameters are rational. The anaerobic pre-treatment plays an important role in the process.