Diverting Organic Waste from Landfill economically and sustainably
Phone   07 5445 9704

WDU Composting Technologies

Delivering innovative, energy efficient and cost effective technology for on-site processing of organic waste.

OSCA Composting Technologies

Mitchell Harrey Pty Ltd – the parent company of both OSCA Composting Technologies and Worms Downunder - is 100% Australian owned and operated. The company was started in 2006 by Dr Paul Harrey and Dr Penelope Mitchell with the sole focus of creating sustainable technologies for recycling organic waste into compost and soil conditioners. The team built their first Aerobic Composting machine (an OSCA I) in 2010 with the financial assistance of the Qld State Government. Since then the range has expanded considerably and machines have been quietly working all over Australia and offshore converting organic waste into useable compost. The company's core values include building robust, reliable and sustainable technologies, supporting Australian industries and suppliers, and offering excellent ongoing and support for our customers.

Dr Paul Harrey (PhD, BSc Hons) – Director

Dr Paul Harrey (PhD, BSc Hons) – Director

Since graduating from Brunel University in 1997 Paul has always had a strong passion for sustainable technologies. His PhD research was focused on clean manufacturing processes for electronic circuits and systems. He has consulted on many global sustainable projects and technologies and now runs OSCA Composting Technologies full time. Paul's role in the business is design and development of the OSCA range. He is a strong advocate of Australian Made and maintains great relationships with his suppliers and customers. In his spare time Paul is keen on researching ETs, green technologies and natural systems. In addition to a love of the environment Paul also has a soft spot for Triumph Motorcycles and Lotus Cars (no one is perfect!).

Barry Mitchell – Sales

Barry Mitchell – Sales

Barry has been in sales and business management for over 40 years. In his previous lives, Barry has owned numerous successful businesses including real-estate, manufacturing, hospitality and gaming, and has built up an impressive property portfolio. He has a gift for looking after new and existing customers ensuring long and healthy business relationships.

John Chappell (Licensed Electrical Contractor) - Electrical Systems

John Chappell (Licensed Electrical Contractor) - Electrical Systems

John has been designing and manufacturing machine control systems since 1965. He has owned numerous companies involved with electrical systems and has consulted on numerous projects including the design and commissioning of the Snowy River Dam project. His wealth of knowledge and inventive streak are greatly appreciated talents. For fun John builds and maintains scale model electric locomotives.