New Rolling Bed Dryer Addresses Green Waste And Organic Residues Issues

For decades, municipalities, producers, and manufacturers have attempted to properly dispose of organic wastes in an environmentally friendly manner. Organic waste products, which in a dry state are usable as alternative fuel or can be transformed to charcoal, can have high initial moisture content and need very long residence times during drying. These are often non-uniform in shape and size, sometimes are contaminated and in many cases are sensitive to heat, ignition, emit volatiles or generate explosive fines.

For drying of green waste, the use of either rotary drum driers, belt driers or fluid bed driers has been state of the art. But all those types of dryers have significant disadvantages such as insufficient product residence times, partial overheating of the solid, inability to use low-temperature secondary heat and poor solid mixing.

Almo Process Technology's new rolling bed dryer attempts to address these issues. Almo's dryer can produce new and alternative fuels from the preparation and drying of organic wastes such as wood chips and green waste -- sometimes mixed with fruits or wine residues, sugar beet pulp or even horse manure.