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Biochar and Bioenergy: An emerging tool for environmental management

Adriana Downie1 and Lukas Van Zwieten2

1 University of New South Wales/BEST Energies
2
NSW Department of Primary Industries

Abstract

Australian developed biochar technology is leading the world in demonstrating carbon negative (removing CO2 from the atmosphere) renewable energy production. The technology recycles waste biomass such as animal manures and municipal greenwaste to produce renewable electricity (displacing fossil fuels) and a very stable form of carbon called biochar which can be sequestered beneficially over the long-term in soils (natural, low-risk sinks). Technology developers BEST Energies have been working closely with NSW Department of Primary Industries to verify their AgricharTM biochars potential to both sequester carbon and improve productivity in a range of Agricultural applications. An extensive experimental program including biochar characterisation, pot trials, incubation and leaching studies, and in-field trials in a range of crops including; sweet corn, faba bean, sugar cane, pasture, macadamia nuts and avocados has been expanding over the last four years. The work has scientifically demonstrated that biochar amendment can; improve several soil health indicators, increase crop yields, decrease fertiliser requirements and therefore enhance agricultural sustainability. In addition, AgricharTM soil amendment can decrease soil emissions of the potent greenhouse gas nitrous oxide, a significant global warming contributor.

Biochar offers many advantages for environmental management as it combines solutions for biomass waste management and resources recovery, with the production of renewable ‘green’ energy, the increased sustainability of agriculture through biochar application, increased energy efficiency in industry, carbon sequestration and rural development. Several collaborative feasibility studies have been conducted to assess the business case for the commercial role out of the technology for the benefit of Australian industry and farmers. The economic drivers are well understood and the commercialisation pathway and near term applications will be discussed.

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