Reducing Greenhouse Gases and Odour

A gas flare completes a landfill gas collection system that was installed in late 2013. The system vacuums landfill gas from a network of pipes that has been installed in the landfilled waste.

The collected gas is then burned at a high temperature of approximately 800 degrees C. Annually the system typically collects > 4.0 million m3 of landfill gas and reduces Kimbriki greenhouse gas emission by 30,000 tonnes CO2-e.

The landfill gas collection equates to more than 1,600 olympic-sized swimming pools every year. Landfill gas typically contains methane (45-60%), carbon dioxide (40-60%), nitrogen (2-5%) and other components such as oxygen, sulphur compounds, hydrogen, and carbon monoxide, which comprise less than 1%.

The global warming potential of methane is 21-26 times that of carbon dioxide, so it is better to burn the landfill gas and convert it into Carbon Dioxide and water, rather than releasing into the atmosphere. This reduces Kimbriki’s greenhouse gas emissions by 30,000 tonnes of CO2-e each year.

Recent trials with horizontal gas collection pipes laid in trenches have shown that gas can be collected from quite newly buried waste in landfill, with good results.

Gas Flare at Kimbriki