M.Sc. Philipp Stier

Wissenschaftlicher Mitarbeiter

AG Bioprozesstechnik und Trocknungstechnik

Lehrstuhl für Lebensmittel- und Bio-Prozesstechnik
ZIEL – Institute for Food & Health
Weihenstephaner Berg 1
85354 Freising

Tel.: +49 8161 71-5032

Raum: O.08

Thema und Inhalt der Dissertation:

Keywords: bioindicators, surface decontamination, sterilization, hydrogen peroxide, submerse cultivation, bioreactor, bacterial spores, Bacillus atrophaeus, Geobacillus stearothermophilus;

More safety in sterilization - Since many products from the food/beverages and pharmaceutical sectors have to be treated under aseptic conditions, potential weaknesses and possibilities for sterilization can be demonstrated by biological indicators (BI). Bacterial spores of Bacillus atrophaeus and Geobacillus stearothermophilus are often used as BI to monitor decontamination processes with hydrogen peroxide. Results in practical inactivation tests, however, vary considerably.

Standardization of BI for hydrogen peroxide decontamination - It is well known that growing conditions of bacterial spore formers can have influence on their spore resistance. This project will generate fundamental knowledge for the standardized production and application of BI.


Standardized production of biological indicators for the evaluation of surface decontamination with hydrogen peroxide and minimization of their variance
IGF-Project Nr. 19358 N