扩散系数及其对某些生化因素的依赖性。

Diffusion coefficient and its dependency on some biochemical factors.

作者信息

Onuma M, Omura T, Umita T, Aizawa J

机构信息

Department of Civil Engineering, Iwate University, Ueda 4-3-5, Morioka, Japan.

出版信息

Biotechnol Bioeng. 1985 Nov;27(11):1533-9. doi: 10.1002/bit.260271103.

DOI:10.1002/bit.260271103

PMID:18553605

Abstract

The diffusion coefficients for glucose and oxygen through the microbial aggregate were measured, and then the dependency on the biochemical factors was investigated. Kinetic and diffusion studies were carried out experimentally for this purpose. Both coefficients were found to be dependent not only on the bacteria concentration but also on the C/N ratio of microbial aggregate at the high bacteria concentration, when the temperature was 20 +/- 2 degrees C. On the other hand, these values were considered to be independent of both factors at the low bacteria concentration, when the temperature was 20 +/- 2 degrees C. In other words, both coefficients were approximately 86-95% of the values in water at the high bacteria concentration and nearly 100% of the values in water at the low bacteria concentration. It was also found that they were dependent on the temperature.

摘要

测量了葡萄糖和氧气通过微生物聚集体的扩散系数，然后研究了其对生化因素的依赖性。为此进行了动力学和扩散实验研究。当温度为20±2℃时，发现在高细菌浓度下，这两个系数不仅取决于细菌浓度，还取决于微生物聚集体的碳氮比。另一方面，当温度为20±2℃时，在低细菌浓度下，这些值被认为与这两个因素无关。换句话说，在高细菌浓度下，这两个系数约为水中值的86 - 95%，在低细菌浓度下接近水中值的100%。还发现它们取决于温度。