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Title: | Multiple sensor-type system for monitoring the microbicidal effectiveness of aseptic sterilisation processes | Authors: | REISERT, Steffen Geissler, H. Weiler, C. WAGNER, Patrick Schoening, M. J. |
Issue Date: | 2015 | Publisher: | ELSEVIER SCI LTD | Source: | FOOD CONTROL, 47, p. 615-622 | Abstract: | The present work describes a novel multiple sensor-type system for the real-time analysis of aseptic sterilisation processes employing gaseous hydrogen peroxide (H2O2) as a sterilant. The inactivation kinetics of Bacillus atrophaeus by gaseous H2O2 have been investigated by means of a methodical calibration experiment, taking into account the process variables H2O2 concentration, humidity and gas temperature. It has been found that the microbicidal effectiveness at H2O2 concentrations above 2% v/v is largely determined by the concentration itself, while at lower H2O2 concentrations, the gas temperature and humidity play a leading role. Furthermore, the responses of different types of gas sensors towards the influencing factors of the sterilisation process have been analysed within the same experiment. Based on a correlation established between the inactivation kinetics and the sensor responses, a calorimetric H2O2 sensor and a metal-oxide semiconductor (MOX) sensor have been identified as possible candidates for monitoring the microbicidal effectiveness of aseptic sterilisation processes employing gaseous H2O2. Therefore, two linear models that describe the relationship between sensor response and microbicidal effectiveness have been proposed. (C) 2014 Elsevier Ltd. All rights reserved. | Notes: | [Reisert, S.; Schoening, M. J.] FH Aachen, Inst Nano & Biotechnol, D-52428 Julich, Germany. [Geissler, H.; Weiler, C.] SIG Combibloc Syst GmbH, D-52441 Linnich, Germany. [Wagner, P.] Hasselt Univ, Inst Mat Res, B-3590 Diepenbeek, Belgium. | Keywords: | Hydrogen peroxide; Calorimetric gas sensor; Metal-oxide semiconductor; Sterilization; Bacillus atrophaeus;hydrogen peroxide; calorimetric gas sensor; metal-oxide semiconductor; sterilization; bacillus atrophaeus | Document URI: | http://hdl.handle.net/1942/17855 | ISSN: | 0956-7135 | e-ISSN: | 1873-7129 | DOI: | 10.1016/j.foodcont.2014.07.063 | ISI #: | 000343612700086 | Rights: | © 2014 Elsevier Ltd. All rights reserved. | Category: | A1 | Type: | Journal Contribution | Validations: | ecoom 2015 |
Appears in Collections: | Research publications |
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reisert 1.pdf Restricted Access | Published version | 2.01 MB | Adobe PDF | View/Open Request a copy |
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