Four Functional Zones & Biochar Soil Sequestration (SPV-011)
Operated by SPV-011 (MR-CEA), the 35-hectare mainland greenhouse facility comprises 25 hectares of climate-controlled glasshouses, a 3-hectare nursery and propagation centre, 5 hectares of cold-chain processing, and a 2-hectare logistics distribution hub. Powered by geothermal electricity and rooftop solar, the facility enriches greenhouse atmospheres with captured industrial CO2 (boosting crop yields by 20-30%) and integrates pyrolysis biochar into growth media - generating 31,000 tCO2e/yr in verified carbon removal (+US$6.32M Base Carbon NPV under Verra VM0042).
Brine Fertilisers, Asparagopsis Seaweed & Regenerative Agroforestry
Potassium sulphate and magnesium compounds from the brine valorisation plant replace imported synthetic fertilisers across both mainland greenhouses and the 8-SPV Mentawai Agriculture & Food Company (HC-MAFC). Within HC-MAFC, SPV-028 (Livestock & Dairy) supplements cattle rations with locally cultivated Asparagopsis red seaweed from SPV-056 (Mariculture), cutting enteric methane emissions by over 80%, while SPV-027 (Apiculture & Pollination) and SPV-029 (Plantation & Agroforestry) sequester carbon in shade-grown cacao, vanilla, and coconut soils. Together, these Verra VM0042/VM0047/VM0033 credits generate +US$4.67M (Base) to +US$9.21M (Upside) in Carbon NPV for HC-MAFC - flipping the 8-SPV food-sovereignty portfolio from -US$4.6M pre-carbon NPV (7.6% IRR) into an NPV-positive (>8.0% IRR) self-sustaining cluster.
Food Sovereignty and Regional Supply
The primary market for the agricultural production is the Mentawai One programme itself - supplying fresh, zero-mile produce, dairy, honey, and aquaculture harvests to island resorts, mainland industrial workers, and the five academies and culinary precincts on Siberut Island. Agricultural waste streams feed directly into the HVO biofuel biorefinery (SPV-030) and biochar pyrolysis units (SPV-023), completing a full biological loop in which nothing leaves the ecosystem as waste.
Agriculture as Part of the Closed Loop
The agricultural district receives mineral and CO2 inputs from mainland operations and returns food, biofuel feedstock, and verified soil and marine carbon credits to the same system.
