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Malcolm Construction’s second CDE plant project

Originating as a family-owned business in the 1920s, The Malcolm Group has become one of the leading providers of logistics, construction and maintenance services in the UK. Malcolm Construction, a division of The Malcolm Group, has embarked upon a second project with wet processing industry expert CDE to install a 150tph Construction & Demolition (C&D) waste recycling facility at its Beith site that will assist in the development of sustainable business solutions.

The new plant will be the focus of an upcoming open day event from September 7th to 8th. Extending an invitation to the industry, CDE and Malcolm Construction will host site and plant tours which will offer a unique look at the operation of the new waste recycling solution.

Malcolm Construction’s head office is based in Glasgow with additional facilities in Scotland’s south-west at Irvine (Shewalton Quarry) and Beith (Loanhead Quarry, pictured top). The company provides comprehensive civil engineering and groundwork services and has earned an enviable reputation for quality service and problem solving. Projects are delivered either on a stand-alone basis or as part of a larger package for major contractors, local authorities and engineers.

The company’s construction and demolition waste treatment, transfer and recycling business is an asset within its service. Its three facilities are dedicated towards the sorting of recyclable materials to provide high-quality recycled aggregates, topsoil and subsoil. At the sites, waste is sorted and sent to specialist reprocessors for further processing. These procedures minimise waste sent to landfill, increase recycling rates and reduce Malcolm Construction’s environmental impact.

At its Beith facility, Malcolm Construction identified that landfill space for waste products it could not treat and repurpose was becoming exhausted. The company therefore set an objective to divert over 500,000 tonnes of material a year from landfill. In addition, as a forward-thinking organisation, the company sought to develop marketable and innovative solutions with a broad range of applications in the construction sector.

Ten years ago, the company worked with CDE to install a 70tph recycling wash plant at its Shewalton Quarry. The plant continues to operate to great benefit of the company, and to date has diverted over one and a half million tonnes from landfill. However, as a small capacity plant it could no longer meet growing demand alone.

Therefore, the team at Malcolm Construction spent five years carefully researching all options for the development of a new washplant at the Loanhead site. This included considering a number of brands on the market and visiting a range of CDE reference sites across the UK to observe different plant set-up options. The company concluded with certainty that CDE could offer them the best solution to meet their production requirements and made the decision to invest.

As the site is an existing hard rock quarry, which produces a wide range of aggregates, the solution developed by CDE can conserve their natural reserve and save tipping space.

The C&D waste recycling facility delivered by CDE consists of an R4500 primary feeding and screening system, AggMax 252R logwasher, EvoWashTM sand washing fine material classification plant, AquaCycleTM A600 thickener and Filter Press sludge dewatering system that increases water recycling to more than 95%.

Proven solutions from CDE provide maximum recycling potential and full water treatment achieving considerable reduction in waste-to-landfill volumes. Indeed, the plant was set to process waste at a rate of 150tph but has been overachieving design capacity since commissioning at the Beith site.

The plant is already proving its effectiveness and delivering high quality in-spec products for Malcolm Construction, including a 0-2mm soft sand and 0-4mm concrete sand. The products will be used for concrete production, pipe bedding, and backfilling utility tracks amongst other applications.

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