CDEnviro’s specialist street sweeping recycling systems recover reusable materials such as clean, dewatered sand and aggregates.
The composition and potential contamination of street sweepings and catch basin cleanings adds a layer of complexity to their disposal. The average breakdown of street sweepings includes grit, plastic, paper, cardboard, wood, litter and glass. Catch basin cleanings comprises sand, grit, coarse organics and silt/fine organics.
As a result of multiple materials blending together, street sweeping waste and catch basin cleanings can often be contaminated with trace amounts of chemicals. The challenges are compounded by the increase in landfill taxes globally, which means disposal costs are higher.
To solve these challenges, CDEnviro’s specialist street sweeping recycling systems recover reusable materials such as clean, dewatered sand and aggregates. These materials work in a variety of applications, including sand and stone as recycled concrete, road fill and landscaping; organics in anaerobic digestion, low grade composting and incineration; and fine clay in landfill capping and restoration. Depending on the application and site capacity, CDEnviro offers numerous technologies, from its G:MAX vibrating platform screen technology which can process a number of waste streams and HYDRO:GRADE system for producing stone, sand and organics fractions.
Washed grit is suitable as a non-structural fill or secondary aggregate, while sand, grit and gravel can be used to offset virgin resource extraction. Oversized gravel/grit can be used as recycled aggregates, and organics can be used in composting or go to landfill at reduced volumes.
CDEnviro notes excessive disposal costs can be incurred for landfilling these materials in high volumes, which has historically been the case. The company estimates its systems are processing more than 500,000 tonnes of street sweepings material across the UK, Central Europe, Australia and North America per year.