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Anaerobic Digestion of Organic Waste Materials

Anaerobic Digestion of Organic Waste Materials. Hannes Partl – Hyder Consulting. Sustainability Services. ‘Independent Environmental Professionals with a Social Conscience and a Head for Business’. Waste Strategy & Technology Packaging Management Corporate Sustainability Water Management.

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Anaerobic Digestion of Organic Waste Materials

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  1. Anaerobic Digestion of Organic Waste Materials Hannes Partl – Hyder Consulting

  2. Sustainability Services ‘Independent Environmental Professionals with a Social Conscience and a Head for Business’ • Waste Strategy & Technology • Packaging Management • Corporate Sustainability • Water Management Incorporated 1995 Merged into Hyder 2005

  3. Relevant references • Public Sector: • NSW DEC: TBL Assessment of Organics Management • DEH Canberra (examples RIS, RoHS) • EcoRecycle Victoria, ZWSA, WA EPA • Local Govt, e.g. Liverpool Council • Private Sector: • Banks and financiers: Due Diligence and Independent Certifier services • WMAA – MSW Compost Standard development • VISY, WMNZ, Cleanaway, SITA, WSN, Global Renewables

  4. Organics Processing Organics Processing Drop off Commercial garbage Collection Kerbside Recyclables Containerised Organics Garbage Hardwaste Materials Recovery Facility Alternative Waste Treatment Treatment Markets/Disposal Garden organics White goods Hard waste Markets Markets Energy and/or compost Landfill Markets

  5. Separate biowaste collection systems in Europe

  6. Composting or Digestion ? • Composting is aerobic (with air), digestion is anaerobic (without air) • Digestion happens in a fermenter (digester, ‘tank’) • Composting produces compost • Digestion produces compost, gas and process water • Gas is converted into renewableenergy, process water can be used as liquid fertiliser

  7. Composting or Digestion ? (cont’d) • If odorous materials are being processed, composting also needs to be enclosed • Digestion has somewhat higher capital costs but also higher revenues • Digestion requires less space • Both generic technologies are well proven • There are a range of types and brands of individual technologies

  8. Composting • Open windrow • Enclosed • Tunnels • Agitated bays • Drums • Static and moving piles • Wide range of conditioning and refining equipment

  9. Digestion types • Mesophilic vs. Thermophilic • One stage vs. two stage • ‘Wet’ vs. ‘dry’ • Retention times (4 to 25 days) • Pasteurization • Process water management Digester brands • Dranco, Valorga, DBA, WAASA, KCA Linde, BTA, MUT,

  10. Kompogas – conceptual layout

  11. Kompogas – a sound solution • One of the most widely used anaerobic digestion system worldwide • Flexible to accept a wide range of suitable feedstock in Australia • Compost and liquid fertiliser are of a high quality • Efficient recovery of renewable energy • Design optimised over 15 years • Small footprint • Highly controlled environment, very low risk of odour emissions • Flexible, robust, reliable

  12. “Your kitchen waste is our fuel”

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