The Facility

The ZWEDC AD Facility is the largest dry fermentation anaerobic digestion project in the world and was designed and constructed to meet the stringent standards for LEED Gold Certification. The ZWEDC AD Facility is a fully enclosed and ventilated organic waste processing and renewable power generation facility that will be built in three phases. Each of the three phases would process up to 90,000 tons per year of organic waste (250 tons-per-day) and at full build-out the facility will process up to 270,000 tons-per-year (750 tons-per-day). Each of the three (3) phases will consist of 16 Anaerobic Digestion Tunnels and 4 In-vessel Composting Tunnels and may include 2 x 800 kW combined heat & power supply units per phase for electricity production.

Material Processed
Phase I of the Facility will process the City of San José’s Commercial Organic Waste through a 15-year exclusive Organics Processing Agreement with the City of San José.  The organic material will include pre- and post-consumer source separated food waste, residuals from processing wet and dry materials and yard waste.

Each of the three phases will produce

  1. Power (gross electrical generating capacity of 1,600 kW or 13,363,497 kWh-per-year); and
  2. Finished Compost (30,000 tons per year)

Energy Use
The Facility generates and runs on 100% clean, renewable energy, providing surplus power to Zanker Recycling’s processing operations during peak-hours and with off-peak power being sent back to the PG&E grid.

Technology Details
The ZWEDC Facility uses Eggersmann Anlagenbau’s patented Kompoferm high solids dry anaerobic digestion and IVC Plus in-vessel composting technologies, exclusively licensed to and provided by Zero Waste Energy, LLC.