Performance and dose validation of a coiled tube UV-C reactor for inactivation of microorganisms in absorbing liquids

被引：19
作者：
Mueller, Alexandra [1 ]
Stahl, Mario R. [1 ]
Greiner, Ralf [1 ]
Posten, Clemens [2 ]
机构：
[1] Max Rubner Inst, Fed Res Inst Nutr & Food, Dept Food Technol & Bioproc Engn, D-76131 Karlsruhe, Germany
[2] Karlsruhe Inst Technol, Inst Engn Life Sci, Dept Bioproc Engn, D-76131 Karlsruhe, Germany
来源：
JOURNAL OF FOOD ENGINEERING | 2014年 / 138卷
关键词：
Biodosimetry; Coiled tube reactor; Iodide/iodate actinometry; Inactivation; Residence time distribution; UV-C; VORTEX FLOW REACTOR; ESCHERICHIA-COLI; ULTRAVIOLET-RADIATION; CALCULATING STERILITY; THERMAL INACTIVATION; CHEMICAL ACTINOMETER; POTASSIUM-IODIDE; MODEL; DISINFECTION; EFFICACY;
D O I：
10.1016/j.jfoodeng.2014.04.013
中图分类号：
TQ [化学工业];
学科分类号：
0817 ;
摘要：
The inactivation performance of a colied tube reactor was investigated in respect to hydraulic parameters and the impact of flow conditions and absorption on the UV-C energy delivery. Data of the residence time distributions using tracer step response indicate full use of the reactor volume and flow behavior close to ideal plug flow with increasing Reynolds number. Based on the hydraulic characteristics of the colied tube, the used reactor appears to have an effective design for inactivation. Even though the hydraulic characteristics were similar to plug flow conditions, the attenuation of the UV-C energy delivery due to the presence of absorptive compounds in the liquid remains an influencing parameter on the inactivation performance. In addition, the UV-C dose was evaluated by calculation of the theoretical maximum UV-C energy input and actinometric measurements using iodide/iodate actinometry. Both dose specifications were evaluated for their suitability to describe inactivation kinetics of Escherichia coli ATCC 8739 in clear and absorptive liquid. Since the flow influences the inactivation performance in absorptive liquids, actinometric dose is suitable to describe inactivation kinetics in absorptive liquids. (c) 2014 Elsevier Ltd. All rights reserved.
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页码：45 / 52
页数：8
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