EFFECTS OF DIFFUSION LIMITATION ON IMMOBILIZED NITRIFYING MICROORGANISMS AT LOW-TEMPERATURES

被引：54

作者：

WIJFFELS, RH ^{[1
]}

ENGLUND, G ^{[1
]}

HUNIK, JH ^{[1
]}

LEENEN, EJTM ^{[1
]}

BAKKETUN, A ^{[1
]}

GUNTHER, A ^{[1
]}

DECASTRO, JMO ^{[1
]}

TRAMPER, J ^{[1
]}

机构：

[1] NORWEGIAN INST WATER RES,N-0808 OSLO 8,NORWAY

来源：

BIOTECHNOLOGY AND BIOENGINEERING | 1995年 / 45卷 / 01期

关键词：

NITRIFICATION; IMMOBILIZED CELLS; ACTIVATION ENERGY; DIFFUSION LIMITATION; TEMPERATURE;

D O I：

10.1002/bit.260450102

中图分类号：

Q81 [生物工程学（生物技术）]; Q93 [微生物学];

学科分类号：

071005 ; 0836 ; 090102 ; 100705 ;

摘要：

Activation energies of suspended and immobilized nitrifying bacteria were determined and compared to determine if diffusion limitation results in decreased sensitivity for temperature. The activation energy for the respiration activity of suspended Nitrosomonas europaea and Nitrobacter agilis was found to be 86.4 and 58.4 kJ mol(-1), respectively. The activation energy for oxygen diffusion in the support material, kappa-carrageenan, determined from the effect of temperature on the effective diffusion coefficient (D), was 17.2 kJ mol(-1). Consequently, the apparent activation energy of diffusion limited cells should be lower. It was indeed shown that due to the effect of diffusion limitation and to temperature effects on the Monod constant K-S' the immobilized-cell activity was less sensitive to temperature. The apparent activation energy for immobilized Ns, europaea was between 28.6 and 94.2 kJ mol(-1) and for immobilized Nb. agilis between 1.4 and 72.9 kJ mol(-1), depending on the oxygen concentration and temperature. (C) 1995 John Wiley and Sons, Inc.

引用

页码：1 / 9

页数：9

共 33 条

[1] EFFECT OF TEMPERATURE AND PH ON THE EFFECTIVE MAXIMUM SPECIFIC GROWTH-RATE OF NITRIFYING BACTERIA [J].