Nitrogen removal performance of a hybrid anammox reactor.
Nitrogen removal performance of a hybrid anammox reactor.
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DOI：
10.1016/j.biortech.2011.03.081
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发表时间：
2011-06
影响因子：
11.4
通讯作者：
Yongguang Ma;D. Hira;Zhigang Li;Cheng Chen;K. Furukawa
中科院分区：
文献类型：
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作者：
Yongguang Ma;D. Hira;Zhigang Li;Cheng Chen;K. Furukawa
厌氧氨氧化（anammox）工艺作为传统脱氮工艺的替代技术，近年来引起了人们的广泛关注。在这项研究中，一个创新的混合反应器结合流化床和固定床厌氧氨氧化处理。流化床采用机械搅拌，气体产物能迅速从厌氧氨氧化污泥中释放出来，防止气浮造成的污泥冲刷。包括非织造生物质载体的固定床可以有效地捕获污泥以减少冲刷。在运行过程中，反应器的氮负荷率增加到27.3 kg N/m3/d，总氮去除率为75%。流化床中的生物质浓度达到26-g VSS/L。厌氧氨氧化反应器中存在颗粒污泥，沉降速度为27.3 ± 6.5m/h，污泥体积指数为23 mL/g。细胞外聚合物的定量显示anammox颗粒含有大量的细胞外蛋白。
The anaerobic ammonium oxidation (anammox) process has attracted considerable attention in recent years as an alternative to conventional nitrogen removal technologies. In this study, an innovative hybrid reactor combining fluidized and fixed beds for anammox treatment was developed. The fluidized bed was mechanically stirred and the gaseous product could be rapidly released from the anammox sludge to prevent washout of the sludge caused by floatation. The fixed bed comprising a non-woven biomass carrier could efficiently catch sludge to reduce washout. During the operation, nitrogen loading rates to the reactor were increased to 27.3 kg N/m3/d, with total nitrogen removal efficiencies of 75%. The biomass concentration in the fluidized bed reached 26-g VSS/L. Anammox granules were observed in the reactors, with settling velocities and sludge volumetric index of 27.3 ± 6.5 m/h and 23 mL/g, respectively. Quantification of extracellular polymeric substances revealed the anammox granules contained a significant amount of extracellular proteins.