Eight integration waste facilities

The proposed integrated solid waste management system will include eight different components. But what happens at each of these facilities and how do they work together?

Waste-to-energy facility

The waste-to-energy facility (also known as an energy-recovery facility) will recover energy from the major proportion of waste that would otherwise be landfilled. The facility is anticipated to produce approximately 8 per cent of the total electrical energy currently required to power Grand Cayman.

Bottom ash processing facility

Approximately 20 to 25 per cent of the waste entering the waste-to-energy facility  is not combustible and comes out of the facility as bottom ash. This material will be processed into a stable aggregate to be reused in Grand Cayman‘s construction industry. The ferrous and non-ferrous metals removed from bottom ash will be recycled at overseas markets.

Green waste composting facility

Rather than being processed in the waste-to-energy facility, or disposed of in a new residual landfill, in the future, yard waste from landscaping companies will be processed to produce mulch or compost for use on-island.

Construction and demolition waste facility

The proposed integrated solid waste management system will include a construction and demolition waste processing facility. This facility will receive mixed construction and demolition waste, including waste concrete, metals, wood and other combustibles. The combustibles will be directed to the waste-to-energy facility, metals will be processed in the end-of-life vehicle and scrap metal processing facility, and the aggregates will be crushed and sized for future use on island.

End-of-life vehicle and scrap metal processing facility

Before they can be baled for shipment overseas, end-of-life vehicles and old appliances require depolluting, which involves removing oils, fuels and refrigerants. Other scrap metal, such as old heavy equipment, will be cut down in size if required and also baled for shipment to overseas markets.

Material recovery facility

The material recovery facility will receive, process and bale recyclable materials. The facility will manage recyclables, including paper and cardboard, plastics 1 and 2, glass, tins and aluminium containers. With the exception of glass, which will be crushed for use on island, the rest of the materials will be marketed overseas.

Household waste recovery centre

The household waste recovery centre will be Grand Cayman‘s central drop-off point for public recyclable and non-recyclable household waste, including special waste items such as batteries, oils and fluorescent bulbs. In addition, the facility will function as a reuse centre, where items suitable for reuse will be provided to the public.

Residual waste landfill

Approximately 5 per cent of the total waste stream cannot be managed through other facilities and cannot be recycled. Air pollution control residue is waste generated through the air pollution control system that scrubs emissions of the waste-to-energy facility. This waste will be treated with cement to lock in toxic components and disposed of in a new lined and fully engineered landfill.

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A version of this article appears in print in the October 2019 edition of Camana Bay Times with the headline: Eight integration waste facilities

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