Belt Drying of Sludge

Dr.-Ing. Albert Heindl studied mechanical engineering at the Technical University of Munich, followed by scientific work in the field of drying at the Fraunhofer Institute for Food Technology and Packaging in Munich. Doctorate at the chair for brewery equipment and packaging at the TU Munich/Weihenstephan on microwave vacuum drying of food. Then scientific assistant at the Institute for Agricultural Engineering in the Tropics and Subtropics, University of Hohenheim. Managing Director of Heindl GmbH, Maschinen- und Anlagenbau, Mainburg, specialising in belt and tray drying of agricultural products and foodstuffs. Subsequently, at Riela Karl-Heinz Knoop e.K., Riesenbeck, he was mainly responsible for the use of CHP waste heat from biogas plants for drying purposes in the area of fermentation residue and wood drying. Finally, team leader for drying in the sludge division of HUBER SE, Berching. Today Head of Research & Development in the sludge treatment division of HUBER SE.

Introduction.- Wastewater Treatment Plants and Processing Steps.- Kinds of Dewatered Sludge.- Technological and economic importance of sludge dewatering.- Belt drying of sewage sludge.- Exhaust air and condensate treatment.- Sludge analysis with regard to belt drying and exhaust air treatment.- Storage of dewatered sludge.- Conveying of dewatered and dried sludge.- Properties and Storage of dried sludge.- Pellet Forming of Dried Sludge.- Risks from belt drying plants for sewage sludge.- Important points for successful mounting, commissioning and operation of belt dryers.- Legal Framework and Economics.- Analysis of waste water, sludge and dewatered sludge with regard to sludge drying.- Definitions and basic explanations.