The significant growth in Research and Development activity related to drying and dewatering in the past decade was no doubt triggered by the energy crunch and the rising cost of energy. The recent fall in the world price of oil will not soften the industrial as well as academic interest in drying and dewatering technologies, because developments are not always motivated by energy considerations alone but also by needs related to increased productivity, better product quality, safer and environmentally superior operations new products and processes. The contents of these both volumes show us a wide range of all aspects, fundamental as well as applied, of drying of solids. The authors represent most parts of the world. Publication of these processings mill contribute to rapid information in a multidisciplinary and inter-industry scientific and engineering matter. Even it will favour as a positive outcome an subsequent collaboration between disciplines and various industries facing important drying problems. In the following is given a look a t the main topics of both volumes:
drying theory and modelling spray draying; superheated steam drying drying of granular materials, paper and products, foodstuffs, biomaterials, agricultural pro-industrial drying systems and novel dryers use of solar energy in drying measurement and control of humidity and moisture dewatering ducts and grains W. BECHSTEDT