Comparative Study on HRT and Nitrogen Concentration Effects on Enhancement of Nitrogen Removal by Marine Anammox Bacteria (MAB)
Comparative Study on HRT and Nitrogen Concentration Effects on Enhancement of Nitrogen Removal by Marine Anammox Bacteria (MAB)
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DOI：
10.2965/jwet.2015.119
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发表时间：
2015
影响因子：
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通讯作者：
Qiaoyan Wei;Xiaowu Huang;Yuki Tomoshige;Nian Hong;T. Hama;Y. Kawagoshi
中科院分区：
文献类型：
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作者：
Qiaoyan Wei;Xiaowu Huang;Yuki Tomoshige;Nian Hong;T. Hama;Y. Kawagoshi
与传统的硝化和反硝化系统相比，厌氧氨氧化（Anammox），即亚硝酸盐厌氧氨氧化，被认为是一种独特且新颖的氮代谢途径，用于处理富氨废水，主要是因为它节省了成本。然而，迄今为止，海洋厌氧氨氧化菌（MAB）的富集培养及其潜在的脱氮能力尚未得到充分研究。本研究描述了缩短水力停留时间（HRT）和增加培养基中氮浓度对使用上流柱生物反应器的MAB培养中除氮性能的影响，其中安装无纺布作为生物质载体，并连续监测除氮性能的变化。结果表明，在反应器I中，当进水总氮浓度740 mg-N/L、水力停留时间18 h、氮负荷率(NLR)为1.3 kg-N/m 3 /d时，脱氮率(NRR)达到最大值1.1 kg-N/m 3 /d。对于反应器-II，当NLR为10.08 kg-N/m 3 /d、总进水氮浓度为210 mg-N/L、HRT为0.5 h时，NRR最大为6.33 kg-N/m 3 /d。这些结果表明，缩短 HRT 是在 MAB 培养物中实现高速率脱氮性能的简单方法。
Anammox, anaerobic ammonium oxidation with nitrite, is recognized as a unique and novel nitrogen metabolic pathway for ammonia-rich wastewater treatment compared with conventional nitrification and denitrification system mainly due to cost saving. However, the enrichment culture of marine anammox bacteria (MAB) and its potential nitrogen removal capacity, so far, have not been well studied. The present study described the effects of shortening hydraulic retention time (HRT) and increasing nitrogen concentration in a medium on the nitrogen removal performance in the MAB culture using upflow column bioreactors in which non-woven fabric was installed as biomass carrier and the change of the nitrogen removal performance was continuously monitored. The results showed that in reactor-I, nitrogen removal rate (NRR) of 1.1 kg-N/m 3 /d was attained as a maximum value when the nitrogen loading rate (NLR) was 1.3 kg-N/m 3 /d at 740 mg-N/L total influent nitrogen concentration and 18 h HRT. As for reactor-II, a maximum NRR of 6.33 kg-N/m 3 /d was attained when the NLR was 10.08 kg-N/m 3 /d at 210 mg-N/L total influent nitrogen concentration and 0.5 h HRT. These results indicate that shortening HRT is an easy way to achieve high-rate nitrogen removal performance in the MAB culture.