PulverDryer Technologies of Singapore is currently working with The Public Utilities
Board (PUB) of Singapore on a pilot project utilizing a Three-Stage PulverDryer system to dry and resize Municipal sewage sludge. This material is approximately 20% solids and 80% moisture. It is very sticky and hard to handle. The PulverDryer test unit is designed to mix the raw materials with dried materials at about 50% to 50%. That material is then processed through a three stage PulverDryer System that will reduce to total moisture of the final product between 65 to 75% solids. The drying and resizing of the material within the PulverDryer allows the PUB to rethink traditional methods of disposing the material in a landfill. Proper processing of this material in the PulverDryer also kills pathogens to EPA levels so the final product can be classified as fertilizer or disposed of in a much more inert state in a landfill. This material can also be homogenized and blended with waste wood and/or leaves to create a mulch, or even a fuel to be burned in boilers to create steam power for electrical generation.

The PUB in Singapore currently processes over 800 tons of this waste material that is a burden to dispose of and costly to handle and transport. The PulverDryer offers PUB the opportunity to reduce overall production cost as well as create a valuable commodity from this waste material.

The PUB project commenced operational testing in October of 2004 with all three stages running successfully. Target moisture levels and sizing of material was achieved during initial runs. PulverDryer management will utilize this test site during the next six months to perfect PulverDryer technology and equipment systems.

STAGE THREE OF PUB OF SINGAPORE

FEED SYSTEM FOR PUB OF SINGAPORE

STAGE TWO OF PUB OF SINGAPORE

CARBON AIR SCRUBBER UNIT

PUG MILL FEED SYSTEM

PUG MILL & EXTRUDER