PHYSICAL AND CHEMICAL-PROPERTIES OF ACTIVATED-SLUDGE FLOC
PHYSICAL AND CHEMICAL-PROPERTIES OF ACTIVATED-SLUDGE FLOC
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DOI：
10.1016/0043-1354(93)90107-s
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发表时间：
1993-12-01
期刊：
影响因子：
12.8
通讯作者：
ANDREADAKIS, AD
中科院分区：
文献类型：
--
作者：
ANDREADAKIS, AD
采用7台并联的活性污泥试验装置，研究了不同泥龄（1.1- 17.4d）下活性污泥的絮体粒径、密度、比表面积、碳水化合物含量、脱氢酶活性和沉降性能等理化特性。所使用的分析方法包括染料吸附技术的比表面积测定，库尔特计数器法絮凝物尺寸测量和干扰显微镜絮凝物密度测定。典型的絮凝物的大小被认为是在10-70 μ m的范围内，絮凝物的密度在1.015-1.034克cm-3的范围内。絮凝体密度和尺寸之间的强相关性。测量的比表面积（通常为100-200平方米克-1干污泥）被发现是一个到两个数量级高于相应的几何絮凝体表面积，表明多孔絮凝体结构。污泥沉降性，非丝状污泥，絮凝体的大小，密度和比表面积，但不污泥碳水化合物的含量，这被发现之间的变化为6和18%。
Physical and chemical characteristics of activated sludge such as floc size, density, specific surface, carbohydrate content, dehydrogenase activity and settleability were investigated by seven parallel bench scale activated sludge units operated under different sludge ages (1.1-17.4 days). The analytical methods used included a dye adsorption technique for specific surface area determinations, the Coulter Counter method for floc size measurements and interference microscopy for floc density determinations. The typical floc sizes were found to be in the range 10-70 mum with floc densities in the range 1.015-1.034 g cm-3. A strong correlation between floc density and size was obtained. The specific surface areas measured (typically 100-200 m2 g-1 dry sludge) were found to be one to two orders of magnitude higher than the corresponding geometric floc surface areas, indicating a porous floc structure. Sludge settleability, for non-filamentous sludges, was well correlated to both floc size, density and specific surface area, but not to the sludge carbohydrate content, which was found to vary between 6 and 18%.