Industrial cleaning and waste management specialist Qualitech has launched a new tank cleaning service for the utilities sector, following an investment in the latest screening and classification technology from wet processing industry experts CDE.

CDE’s D:MAX is a mobile, trailer-mounted screening and classification system which efficiently removes grit, rag and other troublesome solids from the water and wastewater treatment process.

Its mobility enables flexible processing of waste across a range of industries as it can be transported between sites to process material closer to the source, therefore eliminating the need to haul waste at high cost to a central processing facility.

Qualitech spokesperson Bob Currie said: “We have identified a clear gap in the market in our region for a tank cleaning contract service of this kind, and it’s an area where we see great potential for future growth.”

“Although this is our first project with the team at CDE, we have long been familiar with their technology and credentials in this space. From the moment we observed the D:MAX solution in operation and witnessed first-hand the results it was delivering we knew it had the potential to play a key role in our business.”

Qualitech’ s new D:MAX will be used to process a variety of waste materials from digesters at wastewater treatment sites at a rate of 120m3/hrat 6% dry solids (DS) content.

With the D:MAX, Qualitech can eliminate plastics, rag, grit and other solids passing through pumps, tanks and centrifuges which can reduce capacity and adversely impact efficiency due to their wear on downstream processes. By removing these highly abrasive materials the D:MAX minimises avoidable and costly downtime for maintenance, while recovering capacity within the process where solids build-ups have occurred resulting in increased operational efficiency.

CDE Business Development Manager Fergal Campbell added: “Qualitech has developed an impressive network in its 10-year history, providing coverage throughout the north and south of England. The solution will play an important role in advancing the circular economy in the region by recovering dewatered grit, with opportunities for applications in construction, and allowing retained sludges to be recovered for energy generation that will produce high quality cake free from solids contamination for agricultural uses”

A key advantage of the D:MAX is that it has the potential to divert high tonnages from waste for landfill and can recover significant volumes of recycled grit and aggregates suitable for a variety of applications.

This material represents an unknown proportion of the volume of sludge that could potentially be removed and transported offsite at significant cost. By utilising the D:MAX only the solids contamination is removed, resulting in considerable reductions in disposal costs, reducing carbon footprint and minimising environmental impact.

In addition to recovering materials for future use, screened organics can be used in electricity and energy generation while screened sludge can be used for composting and agriculture.

For more information about CDE and the D:MAX, visit