Possible Biological Mechanism of Phosphorus Removal
Possible Biological Mechanism of Phosphorus Removal
复制标题
除磷的可能生物机制
DOI：
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发表时间：
1983
期刊：
影响因子：
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通讯作者：
L. Buchan
中科院分区：
文献类型：
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作者：
L. Buchan
本文介绍了一项研究，以确定几种强化除磷活性污泥中累积磷的位置和性质。磷积累的电子显微镜结合能量色散分析的X射线。在所有的污泥中，磷的积累都位于一个特定的形态细胞类型，这也是污泥中的优势生物。这些细胞通常出现在大细胞簇中，并被鉴定为不动杆菌属。定量分析表明，细胞内多磷酸盐颗粒含有超过25%（m/m）的磷和0.15 - 0.36之间的Ca：P比。这些细胞在厌氧期间释放o-P。对导致累积的因素进行了研究，发现在连续有氧培养条件下，累积是可能的，未经处理的污水的不明发酵产物会增强累积;这些产物还诱导细胞内碳储备的累积。结果表明，活性污泥生物除磷的强化与系统中某些不动杆菌的富集有关。
This paper describes an investigation which was conducted to determine the location and nature of accumulated phosphorus in several enhanced phosphorus-removing activated sludges. Phosphorus accumulations were located by electron microscopy combined with the energy dispersive analysis of X-rays. In all the sludges phosphorus accumulations were located in a specific morphological cell-type, which was also the predominant organism in the sludges. These cells typically occurred in large cell-clusters and were identified as Acinetobacter spp. Quantitative analyses indicated that the intracellular polyphosphate granules contained in excess of 25 % (m/m) phosphorus and a Ca:P ratio between 0,15-0,36. These cells released o-P during anaerobiosis. Factors leading to accumulation were examined and it was found that accumulation was possible under continuous aerobic culture and was enhanced by unidentified fermentation products of raw sewage; these products also induced the accumulation of intracel1ular carbon reserves by the cells. It was concluded that enhanced biological phosphorus removal by activated sludge is dependent on the enrichment of certain Acinetobacter spp in the system.