The carbon dioxide released by combustion of biomethane does not increase atmospheric CO 2; this is because the same amount of CO 2is produced from the natural decomposition of the organic matter that initially creates the biomethane. In contrast, the CO 2released from the burning of fossil fuels (such as natural gas) has been locked up in geological formations for millions of years, and would not otherwise be released to the atmosphere. Furthermore, the greenhouse gas effect of methane produced from sewage sludge is 21 times more powerful than CO 2. Therefore, the capturing of this methane and combustion as part of the national gas supply significantly reduces the environmental impact of our operations. The gas to grid plant diverts inedible food waste from landfill, with this type of waste producing twice as much biogas as sewage sludge.

1. Green Gas Information Sheet
CoronaEnergy isdelightedtoannounce thattheyare now a supplier of green gas. The use of green
gas has become increasingly popular in the past few years as more and more businesses become
mindful of theirenvironmental impactandseekssolutionsto become more sustainable. Please see
descriptions of the difference from Natural Gas to Green Gas.
Natural gas is a fossil fuel, which means it was formed over millions of years from the decay of
organic matter by exposure to intense heat and pressure, chemically, it is primarily methane. The
reasonnatural gas is 'bad' isbecause carbonthat was lockedawayinfossil fuelsformillions of years
isreleasedintothe atmospherewhenburned,addingcarbontothe carbon cycle and contributingto
climate change, although natural gas is the cleanest fossil fuel.
Biogas is the product of the breakdown of organic matter, like crop and animal waste, by bacteria.
When the supply of oxygen is restricted, these bacteria feed off the organic matter and produce
methane (60%) and carbon dioxide (40%). This process is called anaerobic digestion and is very
similartocompostingwhichtakesplace inthe presence of oxygen.Biogasalsoreleasescarbonwhen
burned, however since the carbon had been in the atmosphere already within our lifetime, it was
only temporarily stored away and the net effect is neutral on the carbon cycle. Additionally
producingbiogasdivertswaste thatwouldotherwisegotolandfill andreleasemethanewithout any
practical gain.
Biomethane (also known as ‘green gas’) Biogas can be converted to biomethane by removing the
CO2. Biomethane is a gas mixture that is predominantly methane (>97%). It has similar thermal
characteristicstonatural gas. Subjectto meetinggasquality requirementsbiomethaneisconsidered
as pipeline quality gas and can be injected into the natural gas network and used in existing gas
appliances. Corona Energy can source and supply green gas and provide the recognised energy
certificate to validate the source.