RECYCLING & WASTE MANAGEMENT


KEEP CALM AND COMPOST


Kiverco and EnVar, two waste and recycling experts in their respective fields, have joined forces to help protect the environment and create resources for


future generations as a new Kiverco waste screening plant is installed at EnVar’s organic waste treatment site in Cambridgeshire.


EnVar is the UK's largest waste in-vessel and windrow composting facility and currently recycles food waste and green waste, co-mingled food and green waste and specific organic waste. With 30 years’ experience in composting, EnVar now works with a number of Local Authorities throughout the UK.


Kiverco consults, designs, engineers and builds uncompromisingly robust recycling plants for the waste processing industry, utilising the latest technology to consistently provide reliable output and recovery, in line with the latest industry developments.


“AS THE NATION GETS GREENER FINGERS


DURING THE SUMMER, HUGE LEVELS OF


GARDEN WASTE CAN BE EXPECTED.”


THE WOODHURST SITE Regularly operating to full capacity


and with 16 full time workers, the EnVar site is incredibly busy. Recycling peak times change and weather impacts on the process too. For example, as the nation gets greener fingers during the summer, huge levels of garden waste can be expected. During such times, staff can expect to see 35 loads-a-day of mixed food and garden waste, each weighing 26 tonnes.


46 | TOMORROW’S FM


As the waste arrives it is immediately mixed, shredded and blended, then water is added before the material is transported into a tunnel as part of the “in vessel” composting system. During this process, the environment is managed carefully so that the material reaches a temperature of 60° for 48 hours as this eliminates undesirable pathogenic bacteria such as Salmonella and E.coli spp and even weed seeds. The tunnels at EnVar can take up to 450 tonnes of waste in one vessel. Once this process is complete, the waste is transferred to a maturation pad and exposed to the elements. After 8-12 weeks of turning to achieve aeration, close monitoring and turning, the waste is ready to be transferred to the recycling plant for final processing to produce a top quality soil improver and other similar products.


THE CHALLENGE In order to improve throughput and


product quality, EnVar called in Kiverco to review operations. In July 2014, the local Kiverco Area Sales Manager, JP Devlin, met with Neil Pickard, then Executive Director of Envar, to discuss the company’s requirements. The Kiverco service always starts with a detailed review of the client’s present activities and crucially, further consideration of the outcomes the client is looking for. This approach is critically important and enables Kiverco to gain the best possible understanding of the customer’s present and future needs. During this process, Kiverco carries out tests on the input material, to


clearly understand its composition and uses the results gained when making their final proposals.


After detailed discussions, it became apparent that the EnVar site required one purpose designed static plant as opposed to the five separate systems that were currently being used. It was vital for EnVar that the new plant could easily cope with the increasing daily volumes of waste being handled at the site and be flexible in terms of the different fractions that can be sifted.


THE SOLUTION After listening carefully to the


requirements outlined by Envar, Kiverco designed and installed a custom built composting plant, able to separate household organics and recover recyclables with maximum efficiency. This plant was unveiled in September 2015.


THE RESULTS Ultimately, the Kiverco plant


enables the EnVar site to produce a quality, PAS 100 & CQP certified soil conditioner for the agriculture and amateur horticultural markets. Now operating fully, the plant is contributing towards the site processing 105,000 tonnes of co-mingled food and green waste per year.


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