Andidrain operate a 3rd generation D:MAX unit to process a variety of waste
materials from digesters on wastewater treatment sites, separating rag and
plastics as well as grit materials from waste.
With the Andidrain D:MAX, clients can significantly reduce waste to landfill
volumes, recover materials for reuse and save costs.
Mobile Grit Screening and Classification
• Waste that once went to landfill can be
significantly reduced - typically by around 70%
• Waste is now drier and easier to manage.
• Transport movements are reduced as a result of
the recycling and material recovery taking place
• As well as reducing waste to landfill, recovered
materials can be resold, giving customers a new
• In addition to this the organics and other
screenings can be used in energy generation.
The D:MAX is a mobile trailer mounted screening and classification system
used to process a variety of materials from the water and waste water
treatment process. The mobile nature of the unit means that we can deal with
the material at source, on the customer's premises, minimising the transport
Given the increasing costs of sending material to landfill, any system that can
reduce volumes to this extent can have a significant impact on operational
costs for operators in the industry.
Andidrain's D:MAX is a proven solution, offering water utility companies and
their contractors the most efficient processing system for a range of waste
materials and maximises the potential for material recovery.
How it works
First Stage The raw waste is delivered to the D:MAX and fed directly onto the first high
frequency dewatering screen where rag, plastics and any other oversize
material are removed. This material is discharged into a skip at the end of
the screen. The contents of this skip represent the material that is destined
for landfill as it is of no commercial use or value.
Second Stage The wastewater and grit material passes through a polyurethane screen deck
to a collection sump and is pumped to the second treatment stage, which
involves the waste slurry passing through a specially configured
hydrocyclone where fine silts and clays are removed.
Third Stage At the third treatment stage the slurry is discharged from the cyclone onto
the second dewatering screen where the grit is dewatered. This material is
then discharged into a second skip at the end of the screen which can
provide a new revenue stream for D:MAX customers.
The dewatered grit material can be sold as recycled aggregates, suitable for a
number of applications.
Washed grit removed by the D:MAX from digested sludge can be mixed with
the dewatered sludge (centrifuge) cake and sold off for agricultural use.
Summary of Benefits
Above: Andidrain D:Max Mobile Screening Unit
on site at a Wastewater Treatment Plant
Above: Produced by CDEnviro, the manufacturer of D:Max,
this video shows Andidrain D:Max Units on site at various