A Sustainable Solution

Hot Lime Labs offers greenhouse growers a renewable source of CO2 to increase crop yield

The Hot Lime Labs system extracts CO2 and heat from wood waste. Wood is a renewable resource, and burning of forestry biomass is carbon-neutral, making it an environmentally friendly source of CO2 for the greenhouse industry. This clean source of CO2 is better for the environment than the most commonly used sources of CO2, from fossil fuels such as natural gas and liquid CO2.

Why wood is carbon neutral

During their growth, trees absorb CO2 from the atmosphere, which is then converted to carbon. So when you burn a tree, you are only releasing the carbon the tree had stored up during its lifetime.

Wood waste (or slash), is produced during the forestry harvesting process. Often this waste is left to rot on the ground which can cause a fire risk, or be hazardous during heavy rain or flooding. Collecting this wood waste rather than leaving it to rot on the ground has an overall positive impact by preventing soil erosion and damage to waterways, and it allows for further planting of trees, continuing the carbon cycle.

It’s not just us that thinks so either – the US Environmental Protection Agency (EPA) recently announced the burning of forestry biomass would be classed as carbon neutral, joining the UK and European Union (EU).

“The Hot Lime Labs system is a novel concept and looks to be very useful for the horticulture industry. It adds value to wood biomass, which has traditionally just been used as a source of heat, but now clean valuable CO2 can also be recovered.

Managing future fuel supplies is important for any long term biomass-fuelled system so having a system, such as is being developed by Hot Lime Labs, which can flexibly process a variety of low-grade fuel sources is essential to the commercial success.”

Brian Cox, Bioenergy Association NZ Executive Officer

Reduce your emissions

Reduce your carbon footprint – compared to using fossil fuels such as Natural gas or liquid CO2, a switch to biomass means you can reduce the Emission Trading Scheme carbon levy you are paying in order to use that fuel source.

Being able to extract CO2 from wood using our system will change the economics of shifting to wood biomass for heating needs also, away from the most common sources (natural gas, coal and oil).

Costs for using fossil fuels for heating and providing greenhouses with CO2 have come about due to the Emissions Trading Scheme (ETS). The Emissions Trading Scheme is the Government’s main tool for meeting domestic and international climate change targets.

Development Pipeline

Future development of the Hot Lime System will include the ability to convert other biomass sources to CO2. Examples of this include anaerobic digesters, plant waste material and oil.

The Hot Lime system is one step in the right direction to decarbonise the horticulture industry and reduce reliance on fossil fuels.