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On-site AD eliminates hotel’s food waste collection costs

The installation of a micro-anaerobic digestion (AD) system at a hotel has eliminated food waste collection and disposal costs.

SEaB Energy installed the digester in a standard shipping container at Best Western Chilworth Manor Hotel (pictured above), located on the University of Southampton Science Park (USSP).

For the hotel and USSP, an average of 500kg of kitchen food waste, cooking oil and spent alcoholic drinks are being collected and processed each day, along with waste from the grounds.

This is processed through the trademarked Flexibuster on-site containerised micro power plant (pictured below).

Electricity and heat generated from the biogas production is used within USSP and liquid digestate from the AD operation is used at a local turfing and landscaping company.

The 8kW combined heat and power unit (CHP) produces an average of 105m³ of biogas per day, providing approximately 57MW of electricity per annum.

The new comes after hospitality industry members called for the AD industry to demonstrate the cost effectiveness of separate food waste collections at the Anaerobic Digestion and Biogas Association (ADBA) hospitality conference.

The hospitality industry faces an annual bill in excess of £2.5bn for food waste according to WRAP.

SEaB Energy said hotels and golf courses can also generate energy and revenue from their grass clippings.

System Model for the Flexibuster at Chilworth Manor:

  • Investment: £120,000
  • Capacity: 500kgs of food and other green wastes per day
  • Electricity generated: 53,100 kWh per year
  • Heat generated: 54,850 kWh per year
  • Annual income:  £29,000
  • Waste disposal savings per annum:  £7,300
  • Operating costs per annum: £9,415
  • Payback: five years

SEaB Energy FlexiBuster

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