摘要：

实验研究了投加填料、DO浓度、碳氮比、设置厌氧段、pH等因素对SBR系统处理味精废水的脱氮效果的影响,通过测定COD、氨氮及TN的去除率,确定了最佳的脱氮环境。结果表明,挂膜成功后TN的去除率可达75.82%;通过控制DO浓度以满足好氧菌需求又不破坏生物膜厌氧微环境;设置前置厌氧段,可丰富反硝化碳源的种类和数量,有助于提高生物脱氮效果。

关键词: 序批式生物膜反应器, 同步硝化反硝化, 前置厌氧, 悬浮填料

Abstract:

The factors,such as fillings added,DO concentration,C/N,settings of pre-anaerobic stage,pH,etc.,have been researched.The optimum denitrifying conditions are decided by determining the removing rates of COD,ammonia nitrogen and total nitrogen.The results show that the removing rate of TN can reach 75.82%,after the biofilm has been formed successfully.When DO concentration is controlled at about 3.3 mg/L,the demands for aerobic bacteria can be satisfied without destroying the micro-environment in the biofilm.Setting the pre-anaerobic stage can enrich the type and quantity of denitrifying carbon sources,which helps to improve the denitrification effect.

Key words: SBBR, SND, pre-anaerobic, suspended fillings

中图分类号: 

• X703.1