| Autor: |
Goncharuk, Vladyslav V., Saprykina, Mariya N., Bolgova, Elena S., Melnyk, Liydmyla O., Remez, Sergii V. |
| Zdroj: |
Desalination & Water Treatment; May 2022, Vol. 258 Issue: 1 p190-196, 7p |
| Abstrakt: |
The efficiency of Escherichia colidisinfection using low-pressure CO2(0.05–0.20° MPa) in the temperature range of 14°C–42°C has been studied. It has been shown that inactivation of E. coliin distilled water reaches 4.0–5.5-log orders of magnitude (the initial bacterial load is 1.3 × 104–9.0 × 105CFU/cm3) after 5° d from the moment of treatment and holding at a given pressure at all studied pressure values and temperatures. The highest rates of disinfection were observed at maximum investigated temperature and pressure. Inactivation of E. coliin control experiments (without CO2) was only ~ 1.5-log orders of magnitude under similar conditions. The study of the process of inactivation of E. coliin distilled water containing nutrient broth showed a high preservative ability of CO2at a saturation pressure of 0.1 MPa. Despite the presence of nutrients, the growth of E. coliin a solution treated with CO2was not observed in the entire studied temperature range for 6 d, while the inactivation of microorganisms for the specified period was 4.2, 0.5, 6.0 and 6.0-log orders of magnitude at temperatures of 14°C, 22°C, 37°C and 42°C, respectively. |
| Databáze: |
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