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Efficient water usage in aggregates system

2000 aps david einig

A land restoration business has called in Aggregate Processing Solutions (APS) to support its rapid growth. David Einig Contracting has invested in a CDE inert waste washing plant to meet its needs.

The washing plant, based at the company’s recycling site in Witney, Oxon, comprises standard modular relocatable units for one specific solution, featuring an AggMax 250, an M2500 dry screen, an EvoWash 152 and a GEA CF 8000 centrifuge.

Other elements include an A400 AquaCycle, a 100A AquaStore water tank and a 100cu m buffer tank.

The washing plant is being fed by a specially adapted Terex Finlay 883+ and is processing inert material.

The system incorporates an efficient water management system that recycles a huge percentage of water in a closed circuit, using a minimal top-up to compensate for moisture leaving the system within the materials that are produced. This is sourced from an on-site borehole.

After the recovery of sands and aggregates, the centrifuge finally recovers any suspended solids in the effluent overflow, cleans the water and recycles the material found within it.

At a rate of 130 tonnes an hour, the plant is scalping off +80mm materials, washing and recovering 80-40mm, 40-20mm, 20-10mm and 10-4mm, as well as a soft and sharp sand. The oversize is fed into the company’s Tesab RK623CT to produce Type 1 sub base.

John Dunne, managing director of APS, said: “We had input on the design, manufacture and delivery of all the components. This ensures that the water treatment works in unison with the washing plant, something you don’t often see with other systems.”



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