東華大學圖書館 |

Language: English

Help

回圖書館首頁

手機版館藏查詢

Back

Switch To: Labeled | MARC Mode | ISBD

UV disinfection between concentric c...

Ye, Zhengcai.

Linked to FindBook

Google Book

Amazon

博客來

UV disinfection between concentric cylinders.

Record Type:	Language materials, printed : Monograph/item
Title/Author:	UV disinfection between concentric cylinders./
Author:	Ye, Zhengcai.
Description:	152 p.
Notes:	Adviser: Larry J. Forney.
Contained By:	Dissertation Abstracts International68-05B.
Subject:	Agriculture, Food Science and Technology. -
Online resource:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3261742

UV disinfection between concentric cylinders.
Ye, Zhengcai.

UV disinfection between concentric cylinders. - 152 p.

Adviser: Larry J. Forney.

Thesis (Ph.D.)--Georgia Institute of Technology, 2007.

Outbreaks of food-born illness associated with the consumption of unpasteurized juice and apple cider have resulted in a rule published by the U.S. Food and Drug Administration (FDA) in order to improve the safety of juice products. The rule (21 CFR120) requires manufacturers of juice products to develop a Hazard Analysis and Critical Control Point (HACCP) plan and to achieve a 5-log reduction in the number of the most resistant pathogens. Ultraviolet (UV) disinfection is one of the promising methods to reach this 5-log reduction of pathogens.Subjects--Topical Terms:

1017813
Agriculture, Food Science and Technology.

UV disinfection between concentric cylinders.
LDR:02905nam 2200289 a 45 001 955365
005 20110622
008 110622s2007 ||||||||||||||||| ||eng d
035 $a (UMI)AAI3261742
035 $a AAI3261742
040 $a UMI $c UMI
100 1 $a Ye, Zhengcai. $3 1278831
245 1 0 $a UV disinfection between concentric cylinders.
300 $a 152 p.
500 $a Adviser: Larry J. Forney.
500 $a Source: Dissertation Abstracts International, Volume: 68-05, Section: B, page: 3233.
502 $a Thesis (Ph.D.)--Georgia Institute of Technology, 2007.
520 $a Outbreaks of food-born illness associated with the consumption of unpasteurized juice and apple cider have resulted in a rule published by the U.S. Food and Drug Administration (FDA) in order to improve the safety of juice products. The rule (21 CFR120) requires manufacturers of juice products to develop a Hazard Analysis and Critical Control Point (HACCP) plan and to achieve a 5-log reduction in the number of the most resistant pathogens. Ultraviolet (UV) disinfection is one of the promising methods to reach this 5-log reduction of pathogens.
520 $a The absorption coefficients of juices typically vary from 10 to 40 cm -1 and can be even higher depending on brand and processing conditions. Thin film reactors consisting of two concentric cylinders are suitable for inactivating pathogens in juices. When the two concentric cylinders are fixed, the flow pattern in the gap can be laminar Poiseuille flow or turbulent flow depending on flow rates. If the inner cylinder is rotating, and the rotating speed of the inner cylinder exceeds a certain value, the flow pattern can be either laminar or turbulent Taylor-Couette flow.
520 $a UV disinfection between concentric cylinders in laminar Poiseuille flow, turbulent flow and both laminar and turbulent Taylor-Couette flow was investigated experimentally and numerically. This is the first systematic study done on UV disinfection between concentric cylinders in all three flow patterns. The present work provides new experimental data for pathogen inactivation in each of the three flow patterns. In addition, the present study constitutes the first systematic numerical CFD predictions of expected inactivation levels. Proper operating parameters and optimum gap widths for different flow patterns are suggested. It is concluded that laminar Poiseuille flow provides inferior (small) inactivation levels while laminar Taylor-Couette flow provides superior (large) inactivation levels. The relative inactivation levels are: laminar Poiseuille flow < turbulent flow < laminar Taylor-Couette flow.
590 $a School code: 0078.
650 4 $a Agriculture, Food Science and Technology. $3 1017813
650 4 $a Engineering, Chemical. $3 1018531
690 $a 0359
690 $a 0542
710 2 $a Georgia Institute of Technology. $3 696730
773 0 $t Dissertation Abstracts International $g 68-05B.
790 $a 0078
790 1 0 $a Forney, Larry J., $e advisor
791 $a Ph.D.
792 $a 2007
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3261742