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"When we add nitrogen from air to the slurry, it changes the environment to stop methanogenesis basically. So it drops the pH down to just below six and we're catching that early. So it stops the breakdown of those methane microbes that then release the gas to the air," Puttick said, adding their patented technology is the only one of its kind.
What comes out of the machine is an odorless brown liquid, called NEO -- a Nitrogen Enriched Organic fertilizer.
According to N2, their NEO has double the nitrogen content of regular nitrogen fertilizer; one of the most commonly used fertilizers to boost production of corn, canola and other crops.
Puttick said independent tests showed their technology reduces methane emissions from slurry by 99%. It also cuts by 95% the emission of ammonia; described by the EU as one of the main sources of health-damaging air pollution.
On a 200-cow dairy farm this equates to "a reduction of 199 tons of carbon equivalent every year with one machine," said Puttick, adding that they're now looking to scale out the technology across the UK livestock sector, and have recently installed it at a pig farm