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化工学报  2014 

好氧颗粒污泥吸附氨氮性能

DOI: 10.3969/j.issn.0438-1157.2014.03.025, PP. 942-947

Keywords: 吸附,好氧颗粒污泥,氨氮,胞外聚合物

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Abstract:

在水温(25±1)℃、0.1mol·L-1Trise-HCl缓冲液为反应体系并不断通入高纯氮气的厌氧条件下,以小试SBR反应器培养的好氧颗粒污泥为吸附剂,考察了好氧颗粒污泥对氨氮的吸附作用及其影响因素。好氧颗粒污泥表现出比絮体活性污泥更大的对氨氮的吸附容量。当初始氨氮浓度为30mg·L-1时,颗粒污泥与絮体污泥的吸附容量分别为1.83mgNH4+-N·(gVSS)-1和1.18mgNH4+-N·(gVSS)-1。由于细胞之间的遮蔽效应,污泥对氨氮的吸附容量随污泥浓度的升高而降低。盐度(NaCl)显著影响颗粒污泥对氨氮的吸附效果:盐度越高,污泥吸附容量越小。试验结果表明,污泥对氨氮的吸附作用不可忽略且需要进一步深入研究。

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