Author(s):
1. Branko Neral, Fakulteta za strojnštvo, Univerza v Mariboru, Slovenia
2. Polona Lesjak, Gorenje d.d., Slovenia

Abstract:
Domestic textile laundering is complex process where huge deposit of electric energy and water is necessary to ensures appropriate cleaning and disinfection efficiencies. Textiles may contain different types of microorganisms, thus posing a potential risk for the health of users. Disinfection effects of different domestic laundering procedures were investigated under conditions stated in IEC 62958 Ed.1 (59D/423/DPAS-2014, Dec2014). Textile bioindicators were applied for evaluation of the disinfection efficiency using two cultures of microorganisms: Enterococcus faecium ATCC 6057 and Staphylococcus aureus ATCC 6538. Different classical laundering procedures (Normal/Time/Eco) for washing domestic textiles were performed, consisting of main-washing, rinsing, and spinning. An SensoCare Gorenje d.d. (SLO) drum washing machine was used, with a programmable washing process, and a microprocessor regulation of time, temperature, and mechanical action. Used laundering detergent IEC-A was composed from: 77 % of basic powder, 20 % of SPT (oxidizer), 3 % of TAED (bleach activator). The amounts of detergent was determined according to SIST EN 60456. Microorganisms’ colonies on the textile biondicators (CFU, Colony Forming Units) before and after the disinfection laundering procedure were counted, and a calculation of the reduction efficiency (RED) was performed as determined by SIST standards. It was found that the reduction of more than 5 log steps was achieved when Cotton-Normal/Time/Eco laundering procedures at 40 0C were performed.

Key words:
textile laundering, laundry hygiene, microorganisms

Thematic field:
Textile Engineering

Date of abstract submission:
15.07.2016.

Conference:
XI Savjetovanje hemičara, tehnologa i ekologa Republike Srpske

Abstract