序批式生物膜反应器的同步硝化反硝化研究

Study on the nitrogen removal by simultaneous nitrification and denitrification in sequencing batch biofilm reactor

序批式生物膜反应器(SBBR)在好氧条件下能创造缺氧微环境,出现同步硝化反硝化现象。为在城市污水处理中实现持久稳定的同步硝化反硝化过程,研究了DO、C/N、温度和pH对SBBR同步硝化反硝化的影响。结果表明:DO是影响同步硝化反硝化重要因素,温度和pH对硝化菌和反硝化菌的生物活性具有明显的抑制作用,在中性和略偏碱性时可较好地实现同步硝化反硝化。

The sequencing batch biofilm reactor （SBBR） can create an anoxic micro environment under aerobic conditions and has better performance of simultaneous nitrification and denitrification （SND）. In order to achieve steady nitrification and denitrification process for a long time during domestic sewage treatment, the effect of DO, C/N ratio, temperature and pH on the process in SBBR has been investigated. The results show that DO is an influential factor which affects simultaneous nitrification and denitrification. It is found that temperature and pH can obviously inhibit the biological activity of nitrifying bacteria and denitrifying bacteria. Simultaneous nitrification and denitrification could be realized better, pH is neutral and/or a bit alkaline.