Abstract
| Original language | English |
|---|---|
| Title of host publication | 34th R3-Nordic Contamination Control Symposium |
| Place of Publication | Espoo |
| Publisher | VTT Technical Research Centre of Finland |
| Pages | 37-43 |
| ISBN (Electronic) | 951-38-6285-2 |
| ISBN (Print) | 951-38-6284-4 |
| Publication status | Published - 2003 |
| MoE publication type | B3 Non-refereed article in conference proceedings |
| Event | 34th R3-Nordic Contamination Control Symposium - Turku, Finland Duration: 2 Jun 2003 → 4 Jun 2003 |
Publication series
| Series | VTT Symposium |
|---|---|
| Number | 229 |
| ISSN | 0357-9387 |
Conference
| Conference | 34th R3-Nordic Contamination Control Symposium |
|---|---|
| Country | Finland |
| City | Turku |
| Period | 2/06/03 → 4/06/03 |
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An ultrasonic washing system and its applicability in cleaning of returnable plastic crates. / Klemetti, Irma; Arpiainen, Mari; Salo, Satu; Wirtanen, Gun.
34th R3-Nordic Contamination Control Symposium. Espoo : VTT Technical Research Centre of Finland, 2003. p. 37-43 (VTT Symposium; No. 229).Research output: Chapter in Book/Report/Conference proceeding › Conference article in proceedings › Scientific
TY - GEN
T1 - An ultrasonic washing system and its applicability in cleaning of returnable plastic crates
AU - Klemetti, Irma
AU - Arpiainen, Mari
AU - Salo, Satu
AU - Wirtanen, Gun
PY - 2003
Y1 - 2003
N2 - The hygiene of equipment surfaces plays an important role in dairy manufacture. Especially the environment in which products are packed can easily get contaminated. Returnable transport packages or crates can be one source of contamination. The cleaning of these packages is often incomplete and pathogens and spoilage organisms attached to surfaces can easily survive through the washing process. Hygiene of returnable plastic crates cleaned in washing tunnel was determined in Valio Ltd. Herajoki plant. The cleaning parameters and the microbiological quality of washing liquid were monitored. Using artificially soiled crate pieces were performed the pilot-scale studies with ultrasonic washing system. Design of Experiment (DOE, Taguchi method) was used to optimise the cleaning procedure. According to the results the bottom parts of the crates were the dirtiest parts with the worst cleaning results. Temperature, duration of washing and washing liquid quality varied much in the washing tunnel. Pilot tests showed that the sodium hydroxide (NaOH) containing EDTA was the most efficient detergent in the ultrasonic washing system. The cleaning time of 100 s and the 5 % concentration of washing liquid gave the best cleaning effects. The ultrasonic cleaning method is applicable for cleaning of returnable plastic crates and it stands comparison with the washing tunnel method.
AB - The hygiene of equipment surfaces plays an important role in dairy manufacture. Especially the environment in which products are packed can easily get contaminated. Returnable transport packages or crates can be one source of contamination. The cleaning of these packages is often incomplete and pathogens and spoilage organisms attached to surfaces can easily survive through the washing process. Hygiene of returnable plastic crates cleaned in washing tunnel was determined in Valio Ltd. Herajoki plant. The cleaning parameters and the microbiological quality of washing liquid were monitored. Using artificially soiled crate pieces were performed the pilot-scale studies with ultrasonic washing system. Design of Experiment (DOE, Taguchi method) was used to optimise the cleaning procedure. According to the results the bottom parts of the crates were the dirtiest parts with the worst cleaning results. Temperature, duration of washing and washing liquid quality varied much in the washing tunnel. Pilot tests showed that the sodium hydroxide (NaOH) containing EDTA was the most efficient detergent in the ultrasonic washing system. The cleaning time of 100 s and the 5 % concentration of washing liquid gave the best cleaning effects. The ultrasonic cleaning method is applicable for cleaning of returnable plastic crates and it stands comparison with the washing tunnel method.
M3 - Conference article in proceedings
SN - 951-38-6284-4
T3 - VTT Symposium
SP - 37
EP - 43
BT - 34th R3-Nordic Contamination Control Symposium
PB - VTT Technical Research Centre of Finland
CY - Espoo
ER -