True grit recovery?

North-west 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 expert CDE.

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

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’ 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.

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.