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Water hyacinth (Eichhornia crassipes) is a free-floating aquatic plant native to South America. It is one of the world's most invasive aquatic species, classified as such by the Intergovernmental Platform on Biodiversity and Ecosystem Services (IPBES) and listed by UNEP as the world's most problematic aquatic weed.

Across more than 70 countries it blocks navigation, fishing nets and irrigation; depletes oxygen in the water, killing fish; obstructs hydroelectric power generation; and creates breeding grounds for mosquitoes that spread malaria. It is a quiet, slow-motion economic and ecological emergency.

On Kenya's Lake Naivasha, a 1,480-hectare biodiversity gem in the Rift Valley, water hyacinth has at times carpeted a quarter of the surface, threatening the livelihoods of the 2,500+ people who depend on the lake's fishing economy.

Why it spreads so fast

What makes water hyacinth so formidable is its sheer reproductive speed. Under warm, nutrient-rich conditions a single mat can double in size in as little as five to fifteen days, reproducing both vegetatively. Either by sending out daughter plants on horizontal runners called stolons, or by seed. A mature plant can release thousands of seeds that sink to the lakebed and remain viable for 15 to 20 years, which is why an infestation that looks cleared can rebound after a single season of rain.

The lakes feed it. Fertiliser run-off, untreated sewage and soil erosion load Lake Naivasha and Lake Victoria with nitrogen and phosphorus, the exact nutrients the weed craves. In effect, the hyacinth is a symptom of a wider problem: it flourishes precisely where human activity has over-enriched the water. Removing the plant treats the symptom; the nutrients it locks up are what HyaPak captures and returns, productively, to the soil.

Single-use plastics are responsible for an estimated 1.5% of all global greenhouse-gas emissions. This is a measurable contributor to climate change. They are designed to be used once, often for minutes, and then persist in the environment for centuries.

Nairobi alone generates around 480 tonnes of plastic waste every day, and only <30% of it is recycled (World Bank). Kenya banned single-use plastic bags in 2017, creating an urgent need for credible alternatives.

The afterlife of a plastic bag

A conventional plastic bag is used, on average, for about 12 minutes then takes centuries to break down. It never truly disappears: it fragments into ever-smaller microplastics that wash into lakes and rivers, are eaten by fish, and climb the food chain back onto our plates. Microplastics have now been found in tap water, table salt, rainfall and human blood.

Plastic is also a fossil-fuel product. More than 99% of it is made from oil and gas, and emissions are released at every stage, from extraction, refining, moulding and, eventually, incineration. Producing and burning single-use plastics is what links them so directly to the climate crisis.

A bioplastic is a plastic-like material made from biological inputs. Not every bioplastic biodegrades and many "compostable" plastics only do so in industrial facilities. We design HyaPak material to fully biodegrade in normal soil conditions, leaving no microplastic residue, in 3 to 12 months depending on the product.

The HyaPak recipe is: dried, milled water hyacinth + proprietary plant-based binders + additives, mixed and moulded. The cellulose backbone is what gives our material its rigidity; the binders tune for properties such as moisture resistance, heat tolerance and flex.

Egerton University's Department of Civil & Environmental Engineering helped develop and continues to refine the process. The university provided our first lab space, and treats the venture as both research and a teaching tool.

"Bioplastic" doesn't always mean biodegradable

The word "bioplastic" is one of the most misused in sustainability. It can mean two very different things: bio-based (made partly from plants, but not necessarily able to break down) and biodegradable (able to break down, but sometimes made from fossil fuels). Many products marketed as "compostable" only break down in industrial composters that reach 55–60 °C. This type of infrastructure that simply doesn't exist across many countries in the global south, including East Africa. Thrown in a field or a lake, they behave much like ordinary plastic.

HyaPak is engineered to be both bio-based and home-biodegradable: it returns to soil in ordinary ambient conditions, with no industrial facility required, leaving no microplastic residue behind.

Because the recipe is tuned per product, the same base material can be made rigid enough for a plate or tumbler, flexible enough for a mailer or film, or deliberately short-lived for a seedling wrapper designed to dissolve into the ground it's planted in. Every formulation is tested for moisture resistance, load strength and a controlled, predictable biodegradation time.

A circular economy designs out waste, keeps materials in productive use, and regenerates natural systems. HyaPak is a near-textbook example: an environmental liability (invasive weed) becomes an industrial input, then becomes a product, then returns to soil. It also sits squarely in the blue economy (the sustainable use of freshwater resources) and in climate action.

Crucially, the loop is community-led. Local fishermen and women are paid to extract the water hyacinth. This additional income turns the daily nuisance into a weekly paycheque, and aligning livelihoods with lake health.

Because it links a healthy blue economy to climate action, the model maps directly onto seven of the UN Sustainable Development Goals (SDGs):

• SDG 1No Poverty: harvest income for lakeside fishing communities.
• SDG 8Decent Work: green jobs in harvesting, drying, manufacturing and logistics.
• SDG 9Industry & Innovation: bioplastic R&D and patented processes from a university lab.
• SDG 12Responsible Consumption: drop-in alternatives to single-use plastics.
• SDG 13Climate Action: displacing fossil-fuel plastics and offsetting carbon per product.
• SDG 14Life Below Water: clearing invasive hyacinth to restore lake oxygen and fisheries.
• SDG 15Life On Land: seedling wrappers that feed reforestation and biodiversity.

Adopt a River is HyaPak's community programme alongside other like-minded conservation partners. We mobilise local people to clean up a section of a river running beside their own neighbourhood, about 10 to 20 metres in a single weekend, while running short workshops on environmental restoration and circular thinking. We later come back to measure what stayed clean.

So far we have done this in Nairobi River and River Kandisi, in Kenya. The visible win is a riverbank that no longer looks like a dump. The quieter, longer win is a generation of young volunteers who treat single-use plastic as a real, local problem with their own names on the cleanup.

Water hyacinth — Eichhornia crassipes

Free-floating aquatic plant native to South America. Considered the world's most invasive aquatic weed; affects 70+ countries.

Cellulose

The structural sugar that gives plant cell walls their strength, and HyaPak its rigidity once extracted, blended and moulded.

Bioplastic

A plastic-like material made from biological inputs. HyaPak's biodegrades in soil within 3–12 months, leaving no microplastic residue.

Circular economy

An economic model that designs out waste, keeps materials in productive use, and regenerates natural systems.

Jaza Miti

Kenya's Forestry & Land Restoration Acceleration Program committed to planting 15 billion trees by 2032. HyaPak is a partner.

Blue economy

The sustainable use of ocean and freshwater resources for economic growth, livelihoods and ecosystem health. HyaPak is a freshwater blue-economy venture.

Climate action

Efforts to mitigate or adapt to climate change. HyaPak displaces fossil-fuel single-use plastics and offsets carbon with every product made.

Carbon offset

A reduction in greenhouse-gas emissions that compensates for emissions elsewhere, about 1.6 kg CO₂ per HyaPak seedling wrapper versus its plastic equivalent.

Biodiversity

The variety of life in an ecosystem. Clearing invasive hyacinth restores oxygen to the water and protects the fish and bird life of lakes like Naivasha.

UN SDGs

The 17 UN Sustainable Development Goals. HyaPak's work advances SDGs 1, 8, 9, 12, 13, 14 and 15, from livelihoods to climate action and life below water.

If you're using HyaPak material in academic work, you can cite us as:

HyaPak Ecotech Limited. (2026). Water hyacinth as feedstock for biodegradable packaging: process, products, impact. Nakuru, Kenya. https://hyapak.com/learn

For more journalism or research work, please contact info@hyapak.com for high-res images, interviews and fact-checking. We aim to reply as soon as we can.