Grit is a major problem within the anaerobic digestion of both food waste and sewage sludge. This type of material can include eggshells, bone, lime, ash, glass and various other inert high-density materials. Grit settles in the digester, reducing the capacity in the tank and therefore decreasing the digester’s efficiency.
Digesters require regular cleaning to increase the retention time of bio-solids in the tank as well as reduce the costs of heating it. Removing grit increases digestion and the life of the sludge pumps and other parts. In-line grit- removal technology allows for grit to be removed from the AD processes, without the need to shut down.
CDEnviro grit removal systems use vibrating platform screen technology in to efficiently remove grit, rag and other troublesome solids from a waste stream. The pre-treatment of waste prior to disposal is a requirement from many global landfill directives and the introduction of the D:MAX ensures all requirements are exceeded in terms of the level of treatment afforded to the feed material.