短程硝化／厌氧氨氧化联合工艺处理含氨废水的研究

Study on SHARON/ANAMMOX Process for Treatment of Ammonia-containing Wastewater

在SBR中接种普通好氧活性污泥,通过控制运行条件来实现短程硝化,同时提高厌氧生物转盘系统中厌氧氨氧化的氮负荷,使之与SBR出水中NO2--N的积累量相匹配,并将二者组合形成短程硝化/厌氧氨氧化自养脱氮工艺。处理含氨废水的试验结果表明:在SBR的进水NH4+-N为150～250mg/L、温度为(28±2)℃、pH值为7～8、DO<1mg/L的条件下,可实现稳定的短程硝化,NO2--N积累率达85%以上,NH4+-N负荷达0.129kgN/(kgVSS.d),AOB和NOB的数量之比为103:1。将短程硝化出水加入NH4+-N后作为厌氧氨氧化反应器的进水,在(40±1)℃下可以达到自养脱氮的目的,对NH4+-N、NO2--N和TN的去除率分别达86%、97%和90%以上,TN容积负荷为0.488kgN/(m3.d)。

The single reactor high activity ammonia removal over nitrite （SHARON） process was achieved by inoculating common aerobic sludge and controlling the operation conditions in a sequencing batch reactor （SBR）, and the nitrogen loading rate of anaerobic ammonium oxidation （ANAMMOX） in a anaerobic rotating biological contactor was improved in order to match the accumulative quantity of NO2^- - N in the effluent of SBR. The SHARON process and ANAMMOX process were combined to treat ammonia-containing wastewater. The results show that the SHARON process can be achieved under the conditions of NH4^＋ - N of 150 to 250 mg/L in the influent of SBR, temperature of （28 ±2）℃, pH of 7 to 8 and DO of less than 1 mg/L. The accumulative rate of NO2^- - N is more than 85% , the loading rate of NH4^＋ -N is 0. 129 kgN/（ kgVSS · d）, and the quantitative ratio of ammonia oxidation bacteria （AOB） to nitrite oxidation bacteria （NOB） is 103： 1. The autotrophic nitrogen removal can be achieved at （40 ± 1 ） ℃ when the effluent of SHARON process, mixed with NH4^＋ - N, is used as the influent of ANAMMOX process. The removal rates of NH4^＋ - N, NO2^- - N and TN are above 86% , 97% and 90% respectively. The loading rate of total nitrogen is O. 488 kgN/（ m^3 · d）.