Inactivation of Cryptosporidium parvum oocysts in water using ultrasonic treatment
M Olvera1, A Eguía, O Rodríguez
1Research Centre for Environmental Quality, ITESM-CEM, Carretera Lago de Guadalupe Km 3.5, Atizapán, Estado de México, Mexico.
Abstract:
Ultrasound in a liquid phase cause mass and heat transfer across the liquid through cavitational processes which act as nanoreactors to generate unstable mechanical equilibrium. The effect of 1 MHz ultrasound on the inactivation of Cryptosporidium parvum was investigated. Continuous irradiation of ultrasound (20 min) increased temperature due to cavitational phenomena. Ultrasound irradiation of liquid containing C. parvum showed significant quantitative changes in pH, temperature and inactivation of C. parvum (102.7 oocysts killed/s) with a minimum energy consumption (0.05 oocysts/s).
Related Concept Videos
Physical Methods for Controlling Microbial Growth: Radiation and Filtration
Methods of Sterilization I: Physical Methods
Steam sterilization uses non-toxic, low-cost moist heat in the form of saturated steam under pressure, which is fast, microbicidal, and sporicidal, and quickly warms and penetrates fabrics. Autoclaves, or steam sterilizers, expose each item to direct steam contact for a predetermined time at the necessary...
Methods of Sterilization II: Chemical Methods
Using chemical sterilization rather than heat to clean out equipment is recommended. It eradicates and removes all bacteria,...
Microbial Wastewater Treatment
Physical Methods for Controlling Microbial Growth: Temperature
Biological Treatment of Effluent and Waste Water


