Mull and Iona Community Trust Moray Finch Community Anaerobic Digestion Project

Why AD? Community run Slaughter House Fragile island economy Farming, land not fertile, high feed cost Food production businesses – high cost of waste disposal off island Limited land fill capacity on the island No direct benefit to MICT, wider community benefit from improved sustainability

Project Partners Mull and Iona Community Trust Isle of Mull Cheese Mull Slaughterhouse Isle of Mull Scallops The Scottish Salmon Company Scottish Sea Farms Tobermory Distillery Argyll and Bute Council; 2021 ban on biodegradable waste to landfill – Segregated food waste collection?

How? Funding for Feasibility Study Zero Waste Scotland – Community AD Grant Programme Highlands and Islands Enterprise

Enscape Consulting Ltd Brian Menzies, Paula Copeland – Enscape Consulting Ltd Uisdean Fraser, Synergie Environ Dr Thomas Asprey, Heriot Watt University

Feasibility Study Confirmation of feed stocks available Technical and financial feasibility for AD on Mull Suggested location Recommendation for use of Biogas and Digestate Investigate the of inclusion of sea weed, bracken and sewage Option for additional small scale AD Lab tests to establish methane generation capacity and residence time (Heriot Watt University)

Waste Streams ID Potential Feedstocks Tonnages for Different Scenarios (A to D) AB CD* ABovine slurry1,457 BWhey800 CFish (ensiled) - estimate10 DFish (morts)90 EAbattoir36 FPot ale7,416 GPig slurry124 HScallops and fish offal41 IOld draff75 JHousehold food waste25 KCommercial food waste100 LSeaweed 377 TOTALS10,1742,

Potential locations for small- scale AD? Kintra and/or Abbey Digestate - land application opportunities at Sgriob-ruadh Farm and Killiechronan SSF (Scallastle Bay) – fish waste Preferred location for main AD facility: Sgriob-ruadh Farm – generating slurry and whey A&BC Glengorm landfill site and Scottish Water sewage treatment facility Isle of Mull Scallops – flesh waste Tobermory Distillery – pot ale SSF (Loch Spelve)– fish waste SSF Hatchery (Knock) - ensiled fish waste Shorebase TSSF (Oskamull) – fish waste SSF (Bloody Bay) - fish waste SSF (Fishnish Bay) – fish waste Slaughterhouse (Aros) – ABP wastes Sites of interest on Mull – for feedstocks and AD facility

Potential food waste CommunityPopulationHouseholds Annual tonnage 1.5kg / hh / week Tobermory Isle of Mull2,6671, Iona Mull & Iona2,7921,

Proposed location

Other feed stocks Bracken Sea weed Sewage

Macroalgae to Methane: bridging the energy gap

Sangou Bay, China: the cultivation area stretches for more than 10km out to sea (Google Earth). China grows 9 million tons L. japonica annually making it the largest single species aquaculture crop in the world

Why not wild harvest? The harvestable standing kelp crops around GB have been estimated to cover 100,000 ha. This shallow water vulnerable resource is essential habitat, home to a wide biodiversity of flora and fauna and nursery grounds for many important species. Norway, for example, does wild harvest kelps for alginates, the carefully managed beds are harvested once every 4 – 5 years, question if this is sustainable? In terms of making a contribution to fuels: wild harvest is unsustainable and insignificant

Tiny plants 2mm seeded to string 3 months Each plant at harvest, 6 – 8 months later, 1- 2m Pioneered by SAMS (outplanting since 2003), seaweed culture is now well established in Scotland

Biofuel Development Fund Fuelling the local community: Generation of biomethane from locally grown seaweeds A feasibility study conducted by SAMS on behalf of Mull and Iona Community Trust

Discussion and Questions…