ANAMMOX and partial denitritation in anaerobic nitrogen removal from piggery waste
ANAMMOX and partial denitritation in anaerobic nitrogen removal from piggery waste
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DOI：
10.2166/wst.2004.0748
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发表时间：
2004-01-01
影响因子：
2.7
通讯作者：
Min, KS
中科院分区：
文献类型：
--
作者：
Ahn, YH;Hwang, IS;Min, KS
采用实验室规模的升流式厌氧污泥床反应器，在中温条件下，对高浓度（56 g COD/L和5 g T-N/L）猪场粪污进行了厌氧脱氮试验。基于该过程中的氮和碳平衡，自养和异养生物的贡献也进行了评估，在进水NO2-N/NH 4-N的比例（1：0.8和1：1.2的第1阶段和第2阶段，分别）。本研究结果表明，利用UASB反应器可以成功地进行猪场废水的厌氧脱氮。此外，似乎通过使用颗粒污泥作为种子生物质，ANAMMOX反应可以更快地启动。第1阶段和第2阶段的平均氮转化率分别为0.59 kg T-N/m3反应器-天（0.06 kg T-N/kg VSS/天）和0.66 kg T-N/m3反应器-天（0.08 kg T-N/kg VSS/天）。厌氧氨氧化对NO2-N/NH 4-N的去除率为1.48和1.79。基质中亚硝酸盐含量越高（约50%），亚硝酸盐氮去除率越高，亚硝酸盐氮去除率越低。但部分硝化程度对厌氧氨氧化反应的影响较小，厌氧氨氧化菌与硝化菌之间不存在竞争。反应器底部的生物质颜色从深灰色变为暗红色，伴随着细胞色素含量的增加。在实验结束时，在反应器的下部还观察到直径为1-2 mm的红色颗粒污泥。
The anaerobic ammonium removal from a piggery waste with high strength (56 g COD/L and 5 g T-N/L) was investigated using a lab-scale upflow anaerobic sludge bed reactor at a mesophilic condition. Based on the nitrogen and carbon balance in the process, the contribution of autotrophic and heterotrophic organisms was also evaluated in terms of the influent NO2-N/NH4-N ratio (1:0.8 and 1:1.2 for Phase 1 and Phase 2, respectively). The result of this research demonstrates that the anaerobic ammonium removal from the piggery waste, using the UASB reactor, can be performed successfully. Furthermore, it appears that by using granular sludge as the seed biomass, the ANAMMOX reaction can start more quickly. Average nitrogen conversion was 0.59 kg T-N/m(3) reactor-day (0.06 kg T-N/kg VSS/day) and 0.66 kg T-N/m(3) reactor-day (0.08 kg T-N/kg VSS/day) for Phase 1 and Phase 2. The NO2-N/NH4-N removal ratio by the ANAMMOX was 1.48 and 1.79 for Phase 1 and Phase 2. The higher nitrite contents (about 50%) in the substrate resulted in higher nitrite nitrogen removal by the partial denitritation, as well as the ANAMMOX reaction, implying higher potential of partial denitritation. However, the result reveals that the ANAMMOX reaction was influenced less by the degree of partial denitritation, and the ANAMMOX bacteria did not compete with denitritation bacteria. The colour of the biomass at the bottom of the reactor changed from dark gray to dark red, which was accompanied by an increase in cytochrome content. At the end of the experiment, red-coloured granular sludge with diameter of 1-2 mm at the lower part of the reactor was also observed.