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Enviros offers a full consultancy service to our Commercial Composting Clients from market research and feasibility studies, to commissioning and handover of the operational plants. The following are examples of recent compost design projects:
Beddington Farmlands Green Waste Composting Facility
Enviros has managed the procurement of a Stage 1; 15,000 tonne per annum green waste composting facility for Thames Waste at the Thames Waste facility at Beddington Farmlands, near Croydon. (Viridor Waste Management subsequently bought Thames Waste, and are now the owner/operators of this site.) 
The facility is designed to accept green waste from neighbouring producers. On arrival at the facility, the green wastes are shredded using a dedicated shredder, water being applied during the shredding process to provide adequate moisture content for the composting process. After shredding, the material is placed in one of a number of tunnels using a wheeled loader. 
The composting process has been designed as a forced-air, in-vessel composting process, which provides an initial composting process over a pre-determined period. Oxygen is supplied using 37kW blowers through a network of pipes cast into the concrete base slab. Control over the air flow rate is by frequency inverters linked into volumetric airflow meters, with the primary movement being recirculation of air through the composting mass.
Supplementary air is provided to maintain control over both oxygen concentration and temperature. Waste composting air is transferred to a biofilter via a dedicated blower from where it is released to atmosphere. The relative air flow rates are controlled to ensure that the air space above the composting mass is slightly negative with respect to atmosphere, thereby ensuring that there is little likelihood of unwanted release of malodorous air from the composting mass.
The in-vessel system is fully automated, being controlled by a bespoke software package developed specifically for this kind of process.
The composted material is removed from the tunnels and placed in "windrows" in a maturation area, for a predetermined period before being screened, ready for delivery to end-users.
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Beddington Construction Image Gallery
Click on any thumbnail below to view the full size image.
The latest images below were taken in mid April 2004
The images below were taken during March 2004
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