不同温度下厌氧氨氧化处理含挥发酚和石油类废水运行条件优化试验研究

Study on Optimization of Operation Conditions of Anammox Treatment of Wastewater Containing Volatile Phenol and Oil at Different Temperatures

目前,在工业化进程中有大量的挥发酚和石油类有机物排入水体,严重制约着生物脱氮工艺的发展。而厌氧氨氧化是比传统除氮更节约成本且污染程度低的新型生物脱氮工艺。因此,研究采用厌氧氨氧化工艺处理含挥发酚和石油类的废水,主要对系统的内回流比、水利停留时间(HRT)进行优化,同时考察二者在不同温度下对系统脱氮性能的影响。最终,得出最优运行条件。结果显示,内回流比150%、HRT=8 h,且运行温度为35℃时,厌氧氨氧化系统脱氮效果最佳,对氨氮、亚硝态氮去除率分别高达84.13%和97.79%;系统脱氮速率为0.59170 kgN/(m^(3)·d);厌氧氨氧化反应贡献率为98.3%。

In the process of industrialization,a large number of volatile phenols and oil were discharged into the water,which seriously restricts the development of biological nitrogen removal process.Anammox is a new biological nitrogen removal process that is more cost-effective and less polluting than traditional nitrogen removal.Therefore,in this study,anammox was used to treat wastewater containing volatile phenol and oil,the internal reflux ratio and HRT of the system were optimized,and their effects on the nitrogen removal performance of the system at different temperatures were investigated.Finally,the optimal operating conditions are obtained.The results showed that when the internal reflux ratio was 150%,HRT=8 h,T=35℃,the nitrogen removal effect was the best,and the removal rates of ammonium and nitrite were 84.13%and 97.79%respectively;the speed of total nitrogen removal in anammox was 0.59170 kgN/(m^(3)·d);The contribution rate of anammox was 98.3%.