How it works
Common practice in many regions of the world is to burn or landfill large quantities of agricultural and woody wastes. We estimate that over 20 million tonnes of accessible crop and woody wastes are burned or landfilled every year in Australia, and only a small percentage is recycled in any way.
ECHO2 was developed as a circular economy system that utilises low value organic residues such as city green wastes, plantation forestry residues, wood wastes from construction and crop residues, such as cereal straws. Biochar sequesters large amounts of CO2 in a useful way. It improves the performance of many products including fertilisers, animal feeds and building and construction materials.The first ECHO2 commercial module converts recycled wood, that would otherwise be burned or landfilled, into biochar for the composted products producer Van Schaik's BioGro and into glasshouse heating for South Australian herb grower Holla-Fresh.
Van Schaik's BioGro have purchased all of the biochar from the Holla-Fresh ECHO2 module. BioGro add the biochar to their large nearby composting process. The composted biochar is purchased by local farmers and wine growers to increase soil fertility and water holding capacity.
Puro.earth CORCs only quantify the net-removal and storage of emissions, not reduced or avoided emissions, increased biodiversity or other positive benefits. Here are co-benefits self-reported by the removal supplier.To make biochar, we use recycled wood, plantation forestry residues or crop wastes which would otherwise be burned, land-filled or left to decompose. Those greenhouse gas emissions are avoided by ECHO2 stabilizing the carbon in the biomass into high carbon biochar for hundreds of years and generating renewable energy for heating, cooling, electricity. The biochar is used for horticulture and agriculture.
This approach reduces fire and other health risks, creates local employment and increases the drought tolerance and fertility of soils, reduces the need for synthetic fertilisers and other chemicals and stores large amounts of carbon which accrues benefits lasting centuries.
A Life Cycle Analysis of the Holla-Fresh/BioGro/ECHO2 system showed that 6.33 tonnes of CO2 eq. emissions are avoided for each dry tonne of biochar that we produce and that a net 2.88 tonnes of CO2 eq. are stored in the biochar. Over 95% of the energy in the incoming wood is utilised for drying the incoming wood, for heating the glasshouse or is captured in the biochar.
The revenue acquired by carbon removal suppliers propels their growth, compounding the climate effect and accelerating the carbon net-negative economy.
Income from Puro CORCs allows the next ECHO2 modules to be commissioned and new biochar and syngas commercial products to be developed, increasing the volume of atmospheric CO2-e emissions that is removed and stored in the biochar for centuries.
1 tonne of ECHO2 biochar removes 2,88 tonnes of CO2 eq. from the atmosphere into long-term storage in the product.