Methane-busting seaweed farms on track for 2021 production

Date: 02.12.2020Source: The Lead, Australia

Construction of the first farm and processing plant to turn red seaweed into a feed supplement for cows to reduce their methane production by 90 per cent is expected to begin mid next year in South Australia. Sustainable agriculture company CH4 plans to build its first two facilities in South Australia with further ‘eco-parks’ planned in the state and in New Zealand.

The first site is likely to be on the Yorke Peninsula of South Australia as part of a partnership with the First Nations Narungga people with the second site in Port Lincoln on the Eyre Peninsula of the state. Each farm would be capable of producing about 400 tonnes of dry weight milled seaweed a year – enough to feed up to 20,000 cows. Cattle are a major contributor to greenhouse gas emissions with every one of the 1.5 billion cows on the planet producing about 100kg of methane a year.

The farms are based on research by Australia’s CSIRO, which found that the red seaweed Asparagopsis mixed with regular cattle feed at a rate of 100 grams per cow per day reduced methane production by 90 per cent. CH4 Global has purchased a licence from patent owners CSIRO, Meat & Livestock Australia and James Cook University and gained regulatory approval for the material to be allowed to sell it in Australia. The cold water Asparagopsis species occurs naturally and grows well in New Zealand and also in southern Australia.

Said Steve Miller, CH4 Global CEO: “The most recent data published by CSIRO in February and by UC Davis in California in September both showed that between 25 and 50 grams per cow per day was actually an effective dose that resulted in at least 90 per cent reductions in methane.

“We are optimising our processes, optimising the hatchery work we are doing in South Australia and New Zealand, we are optimising the in-water architecture that’s going to be used and we are doing that in Port Lincoln at the moment and we are optimising the freeze-drying processing work.

“By the end of March we will know enough about each of those three where we will then integrate them into the design of the first facility and we will have already started a lot of the approval processes in the relevant jurisdictions and already have the engineering designs to fit those pieces in to be able to then construct.”

CH4 has acquired 839 ha of potential aquaculture space across three sites in the Spencer Gulf of South Australia: around Port Lincoln in Boston Bay, Louth Bay and Tumby Bay. For more visit theleadsouthaustralia.com.au/

David Cox / IDM

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