亚硝酸型硝化反应器处理“中老龄”垃圾渗滤液研究

Study on Affecting Factors of Nitritation Reactor in Treating Mature Landfill Leachate

在不控制体系pH值的条件下，研究了温度、水力停留时间和溶解氧对亚硝酸型硝化反应器处理“中老龄”垃圾渗滤液的影响。试验结果表明，在氨氮负荷率为0．0690。0．2843gNH4^＋-N／（gVSS·d）的条件下，可获得令人满意的亚硝化性能，出水NO2^-—N／NOx^--N值为87％～95％。亚硝酸氮稳定积累的主导因素是体系中游离氨（FA）和游离亚硝酸（FNA）对硝酸菌的交替抑制作用。

Under the condition that the pH value was not adjusted, the influence of operating parameters including temperature, hydraulic retention time （HRT） and dissolved oxygen （DO） on the treatment of mature landfill leachates by nitritation reactor was investigated. The experimental results show that under the condition of ammonia nitrogen loading rate of 0.069 0 to 0. 284 3 gNH4^＋ -N/（ gVSS · d）, the satisfactory nitritation performance can be achieved and the effluent NO2^- - N/NOx^- - N is 87% to 95%. It is concluded that the alternating inhibition effect of free ammonia （FA） and free nitrous acid （FNA） on nitrobacteria is responsible for the steady nitrite nitrogen accumulation.