Renewables Innovation Award
Winner: Gull / DB Breweries
The brewers call it DB Export Brewtroleum. It’s what you get when you take the leftover waste from making beer, turn it into ethanol, and blend it with petrol.
The mix won DB Breweries and Gull the Renewables Innovation category at this year’s awards.
Corporate relations advisor Simon Smith says the brewery at Otahuhu produces almost 600,000 litres of yeast slurry a year.
The bulk of it goes as stock feed, but the brewers wanted to find an alternate use for the balance.
They stockpiled enough for a run through the refinery to produce 30,000 litres of ethanol, which was mixed into 300,000 litres of petrol – replacing Gull Force 10 at the pumps for about six weeks during July and August.
“Our tagline was ‘drink more DB Export and save the world’,” Smith says.
“We’re looking at doing it again next year now we have shown it is feasible.”
Biofuels have an 8 per cent lower carbon emissions tally than other performance fuels, so DB Export Brewtroleum is credited with saving about 55 tonnes of CO2 emissions.
In total, Gull’s sales of 24 million litres of biofuel over the past eight years has reduced New Zealand’s potential CO2 emissions by 57,000 tonnes.