Acknowledgements The author would like to acknow ledge his debt of gratitude to his many friends in the food industry who have supplied photographs to illustrate this second edition and information on recent new technology in plant and processIng knowledgement so made to Niro Atomizer for the latest technology details on tomato and coffee drying Also Mitchell Dryers Ltd, Carlisle, have given invaluable assistance in making available their pilot drying plant in the factory for experimental dehydration trials of the Western Regional Research Centre of the USDA, Berkeley, California, together with Dr Otto Silberstein of Gilroy Foods Inc have generously supplied updated information on American onion drying technolog The author also thanks the Marchese Lupi di saragno in Vigatto, Italy, for supplying details and photographs of effluent screening technology in high density stock breeding units for meat, ham and pig meat processing in the Parma, Bologna region, particularly in the context of Parma hams Much information has been co on dehydration feasibility b the author from the many studies he has carried out in the course of 12 years in countries as diverse as Egypt, India, South America and Eastern europe, promoting interest in onion dehydration; and in Kenya, South Africa, China, Macedonia, Greece, Turkey and in Western Europe whereAcknowledgements The author would like to acknowledge his debt of gratitude to his many friends in the food industry who have supplied photographs to illustrate this second edition and information on recent new technology in plant and processing. Acknowledgement is also made to Niro Atomizer for the latest technology details on tomato and coffee drying. Also Mitchell Dryers Ltd, Carlisle, have given invaluable assistance in making available their pilot drying plant in the factory for experimental dehydration trials. Mr Glenn Watters of the Western Regional Research Centre of the USDA, Berkeley, California, together with Dr Otto Silberstein of Gilroy Foods Inc have generously supplied updated information on American onion drying technology. The author also thanks the Marchese Lupi di Saragno in Vigatto, Italy, for supplying details and photographs of effluent screening technology in high density stock breeding units for meat, ham and pig meat processing in the Parma, Bologna region, particularly in the context of Parma Hams. Much information has been collated on dehydration feasibility by the author from the many studies he has carried out in the course of 12 years in countries as diverse as Egypt, India, South America and Eastern Europe, promoting interest in onion dehydration; and in Kenya, South Africa, China, Macedonia, Greece, Turkey and in Western Europe where 3