The use of continuous-flow microwave treatment has been proposed for milk pasteurisation due to its potential advantages. Lo pez-FandinÄ o, Villamiel, Corzo and Olano (1996) designed a continuous-flow system which provided the required conditions for the proper pasteurisation of milk. Villamiel, Lopez-FandinÄ o, Corzo, Martinez-Castro and Olano (1996) showed that microwave treatment of milk by continuous-flow is a mild and ecient way to achieve a product with satisfactory microbial and sensory quality without causing an extensive heat damage.