Greenhouses require CO2 as a critical component of photosynthesis to generate economic plant production yields. Greenhouse operators typically supplement CO2 at a rate of up to 1,000 ppm resulting in plant yields being increased by approximately 50%.1
CO2 for greenhouses is traditionally obtained by burning fossil fuels such as natural gas in specialized CO2 generators, where after complete combustion, the flue gases are introduced directly into the greenhouse. The downsides of using natural gas are that moisture is produced during combustion, which may be disadvantageous for growing certain plants, and if combustion is incomplete, contaminants may be present in the flue gases. Alternatively, pure CO2 may be used. This has traditionally been supplied to greenhouses by truck in liquid form and has become popular amongst growers due the elimination of crop damage potential, lack of moisture production, more precise control over CO2 levels and more flexibility to introduce the CO2 when needed. A drawback of this approach however is that liquid CO2 is typically more expensive than CO2 generated from natural gas combustion.2
CO2 Solutions’ technology solves these challenges by allowing CO2 to be captured and concentrated at lower cost from both natural gas combustion gases on site as well as from nearby sources of effluent gas sources.
1 Ontario Ministry of Agriculture, Food and Rural Affairs, Carbon Dioxide in Greenhouses, December 2002 (http://www.omafra.gov.on.ca/english/crops/facts/00-077.htm#cultu)