The Ocean’s Carbon, Captured
Transforming Seaweed into Breathable Walls and Living Soil.
The Ocean’s Carbon, Captured
Transforming Seaweed into Breathable Walls and Living Soil.
About Us
Seaweed is one of the planet's most efficient carbon absorbers.
However, when it washes up on our beaches or sits unsold on farms, that carbon returns to the atmosphere as methane. Feamainn Ltd closes the loop. We intercept raw farmed leftovers and beach-cast waste, locking that "Blue Carbon" into permanent, high-value materials.
Interior Finishes with a Conscience.
Most paints are petrochemical-heavy. Ours is different. By utilising biochar derived from raw marine biomass, we’re creating a line of paints and plasters that do more than just decorate.
- Active Air Purification: Our biochar matrix naturally adsorbs VOCs and household pollutants.
- Carbon Sequestration: We turn "Blue Carbon" (seaweed) into "Black Carbon" (biochar), permanently locking it into your walls.
- Naturally Fire-Resistant: Harnessing the mineral-rich properties of the ocean for a safer home.
Regenerative Agriculture
Our seaweed-derived biochar acts like a sponge transferring it's natural minerals to the soil and holding them with incoming water. Our seaweed-derived biochar is unique:
- Marine Micronutrients: Naturally high in the trace minerals that land-based wood biochar lacks.
- Water Retention: Dramatically improves soil structure in arid and acidic tropical soils.
- Reduced reliance on chemical fertilisers.
Our Story
The Beach-cast Burden
It began on the shorelines of Asia. While seaweed is hailed as a climate saviour, the reality on the ground is messier. Thousands of tonnes of "beach-cast" seaweed wash up every season, rotting in the sun and releasing greenhouse gases. Meanwhile, seaweed farmers are often left with "under-grade" harvests that have no market value.
Our founder, Alison Freeman, saw this gap: a massive surplus of sequestered carbon with nowhere to go.
The Carbon Conundrum
Many attempted to use industrial seaweed waste (from agar production), but they found a problem: the extraction process removed the very carbon needed to create high-quality biochar.
To truly impact the climate, we had to go to the source.
We pivoted to the raw material—the leftovers from farms and the waste from our beaches. This "Raw Feedstock" approach keeps the carbon intact, but it introduces a massive technical hurdle: corrosive marine salts which we overcome with our technology.
The 2025 Mandate
Our timing is driven by necessity. With the 2025 updates to LEED and BREEAM, the construction world is suddenly desperate for materials that carry a negative carbon footprint. By capturing carbon from the sea and putting it into the city, we provide the building blocks for a Net-Zero future.
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A Circular Engine
Today, Feamainn operates at the intersection of marine ecology and urban design.
• In the City: Our Limbec brand offers architects and homeowners a way to build with the ocean.
• On the Farm: Our biochar platforms give seaweed farmers a new revenue stream for their surplus, while regenerating the soil.
We are Feamainn.
Engineered for the Ocean
Feamainn was built to handle what others couldn't. We assembled a team of marine scientiss, architects and industrial operators to build the first salt-tolerant pyrolysis reactor. Our technology doesn't need the seaweed to be pristine or pre-processed. We take it as the ocean gives it us - salty, sandy, and raw and - b
Who we are
Alison Freeman
Joakim Cimmerbeck
Alison Freeman
Science: Aquaculture & Soils
Alison is a current PhD student at the University of Hong Kong
(Faculty of Science) who has 15+ years’ experience in developing and managing international marine and fisheries projects and building start-ups.
Susanne Trumpf
Joakim Cimmerbeck
Alison Freeman
Design & Architecture
Director and Senior Lecture in the Faculty of Architecture, at the University of Hong Kong.
Susanne is a specialist in soils and founded TALL Materials which promotes innovative landscape materials and ecological approaches to materials.
Joakim Cimmerbeck
Joakim Cimmerbeck
Joakim Cimmerbeck
Paint & Plaster Specialist
Joakim is a former investment banker of 30 years’ and founded Eico, a sustainable paint brand in 2009 in the UK and 2011 in Hong Kong. Eico remains the only eco- paint brand in Hong Kong.
Aarik Persaud
Joakim Cimmerbeck
Joakim Cimmerbeck
Business Development
Aarik is an experienced
business operator,
having founded and
sold multiple international hospitality groups.