Get efficient, economical grit dewatering at smaller plants with no washwater requirements.
The SpiraSnail® is a highly efficient screw-type grit dewatering system that delivers 95% removal of all particles 106 micron and larger and 75% of 75-106 micron particles to cut solids handling and disposal costs.
Designed to work in combination with a Hydro International separation and washing unit such as a Grit King®, the SpiraSnail® provides effective, affordable grit dewatering for smaller plants that demand high performance.
The SpiraSnail® is specifically designed to provide dedicated dewatering for the output from high-performance Hydro International grit separation / washing units such as the Grit King.® The SpiraSnail® provides effective, affordable grit dewatering that is ideal for smaller plants with peak flows of up to 10 MGD.
Unlike conventional washing and dewatering screws that attempt to wash and dewater grit in the same process, the SpiraSnail® is only used for dewatering. Combining washing and dewatering in the same process results in turbulence that churns up fine grit and allows it to be released back into the plant. By focusing just on dewatering, SpiraSnail® screw speeds can be slower, allowing retaintion of fine grit while outputting a clean dry product with low organics and water content.
Its unique clarifier design, low loading rates, and slow screw speeds mean that the SpiraSnail® provides high capture efficiency while minimizing re-suspension of captured materials, and its low number of wear parts, easy access for maintenance and washwater-free operation keeps operating and maintenance costs to a minimum.