Pilot Scale

Food Waste Anaerobic Digestion

For Production of

Renewable Resources

Presenters: Suren Wijeyekoon, SCION

Andrew Fisher, ECOSTOCK

Project Partners

SCION (NZ Government owned CRI)

- Estb 1947

- Staff 300, Rotorua

- Focus: Research, Science and Tech Development

- Areas: Bio-Energy, Waste Streams and Bio-Materials

ECOSTOCK (Private Business)

- Estb 2007

- Staff 37, Wiri, Auckland

- Focus: Foodwaste Logistics

- Areas: Packaged and

Unpackaged

The Problem:

Can Anaerobic Digestion deliver renewable resource?

FOOD WASTE

• Variation in products, consistency and nutritional value

ANAEROBIC DIGESTION PLANT

• Safety, stability, practicality and sustainability

PLANT OUTPUTS

• Measurement, format, consistency, verification and benchmarking

Project Time Line

Plant Assembly : June 2016 Installation: October 2016

Commissioning: December 2016 Operation: January 2017

Continuous Plant Safety

Hazardous Area Classification

Design

Flow Control

Hazard Zoning

Monitoring

24/7

SMART Devices

Feedstock (Inwards) and Digestate (Outwards)

Feedstock: 8-15% Solids (Consistency of Soup / Fruit Smoothie)

Digestate: 1-2% Solids (Consistency of silty river water)

Feed Digestate

Getting Information:

Start typing here

Telemetry

Remote Data Acquisition

Digestate Growing Trials

Plant growth rate for digestate was comparable to NPK fertiliser

Products of Value (Renewable Resources)

Methane – 32 MJ/ kg TS

CO2

Digestate (Fertiliser)

50% of NZ food waste 2.2

million GJ/year, energy for

43k homes

75% COD destruction

The Future of AD

315 Anaerobic Digestion plants in UK

7 Anaerobic Digestion plants in Australia

Worldwide more than 500 Anaerobic plants upgraded in 2016 (IEA Bioenergy)

Conclusion

Anaerobic digestion of NZ food waste can create renewable resources

Acknowledgments

Bioresource Processing Alliance for Funding

Plant and Food Research for Growing Trials

Tailored Controls for IT services

Scion and EcoStock teams

www.scionresearch.com

Scion is the trading name of the New Zealand Forest Research Institute Limited

Prosperity from trees Mai i te ngahere oranga

suren.wijeyekoon@scionresearch.com

andrew.fisher@ecostock.co.nz