硝化颗粒污泥的快速培养及其硝化特性分析

以好氧颗粒污泥接种小试柱形SBR，采用自配无机氨氮废水为进水，在中温（28～30℃）条件下通过逐步提升进水NH4^＋-N浓度（100～650mg／L）和缩短水力停留时间（8～4h）快速培养硝化颗粒污泥。实验结果证实，以好氧颗粒污泥接种可以促使硝化颗粒污泥快速形成，36d时粒径〉0．21mm的颗粒污泥占总数的93％，颗粒污泥NH4-N比去除速率为50．53mgNH4^＋-N／（gSS·h）。硝化颗粒污泥具有良好的短程硝化性能，亚硝酸盐产生速率和累积率分别保持在3．3kgNO2-N／（m^3·d）和85％以上。反应初期高FA和反应末期高FNA的共同抑制是该研究中实现和维持稳定短程硝化的关键因素。

Rapid cultivation and nitrification characteristics analysis of nitrifying granules in sequencing batch reactor

A laboratory-scale column-type sequencing batch reactor （SBR） inoculated with aerobic granu- lar sludge was employed to cultivate nitrifying granules by gradually increasing influent NH4-N concentration （ 100 - 650 mg/L） and decreasing hydraulic retention time under mesophilic condition （28 - 30℃ ）, using syn- thetic ammonia-rich wastewater as influent. The results demonstrated that using aerobic granular sludge as seed sludge promoted rapid formation of nitrifying granules. The amount of granules with diameter larger than 0.21 mm was about 93% of the total, and the specific NH4 -N removal rate of nitrifying granules reached a value of 50.53 mg NH4＋ -N/（g SS · h）. Nitrifying granules had a good partial nitrification capacity. The nitrite produc- tion rate and accumulation ratio were 3.3 kg NO2-N/（ m3 · d） and 85% , respectively. It is concluded that the associated inhibition of FA at the start of the reaction and FNA at the end of the reaction would be the key factors to start-up and maintain the stable nitritation.