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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 thousands of 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. It reproduces two ways at once: vegetatively, by sending out daughter plants on horizontal runners called stolons, and by seed. A mature plant can release thousands of seeds that sink to the lakebed and stay 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.

Plastics are a fossil-fuel product, and they are now a measurable driver of climate change. According to the UN and OECD, plastics generated about 1.8 billion tonnes of greenhouse gases in 2019, roughly 3.4% of the global total, and two-thirds of all plastic waste comes from single-use and short-lived products. They are designed to be used once, often for minutes, then persist in the environment for centuries.

Nairobi alone generates an estimated 480 tonnes of plastic waste every day. Globally, less than 10% of all the plastic ever made has been recycled (UNEP). 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 overwhelmingly fossil-derived. The UN estimates around 98% of single-use plastic is made from petrochemicals, with emissions released at every stage, from extraction and refining to 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.

What HyaPak does, in plain terms, is take dried water hyacinth and put it through a proprietary process that turns it into a plant-based material with the look, feel and performance of plastic. The specifics of that process are our own, but the outcome is the part that matters: a material designed to fully biodegrade rather than fragment.

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, infrastructure that simply does not exist across much of 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 material is matched to each product, the same approach can yield something rigid enough for a moulded tray or seedling pot, 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 product is tested for moisture resistance, load strength and a controlled, predictable biodegradation time.

One of the most searched questions about water hyacinth is also the most hopeful: if there is so much of it, what can it actually be used for? Quite a lot, it turns out. Around the world, communities and researchers have learned to treat the weed as a free, fast-growing feedstock rather than pure waste. The trick is that a use has to be valuable enough to pay people to keep harvesting, otherwise the lake just grows it back.

“Biodegradable” is a crowded shelf, and not every option on it behaves the way buyers assume. Here is how HyaPak sits against the materials it actually competes with, on the four questions a packaging buyer or an investor tends to ask first.

Indicative comparison for general guidance. Performance varies by product format and conditions; ask us for the spec sheet and independent test results on a specific application.

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 harvest 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: materials and process R&D from a university partnership.
• 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.

Water hyacinth is not a Kenyan problem. It is the same invasive weed, choking the same kind of lake, on five continents. That is the uncomfortable part of the story, and also the opportunity: the playbook HyaPak runs on Lake Naivasha, harvest the weed, pay the community, turn it into packaging that replaces plastic, is in principle repeatable anywhere the plant grows and a government is already paying to remove it.

The weed reached Africa as an ornamental pond plant and never left. The same arc played out across Asia, the Americas and southern Europe. Wherever it lands, the costs rhyme: lost fisheries, blocked transport, stalled hydropower, more malaria.

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.

The questions we get most often, from students, journalists, buyers and partners.

Water hyacinth, Eichhornia crassipes

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

Feedstock

A raw input fed into a production process. HyaPak's feedstock is harvested water hyacinth, an invasive weed that would otherwise be treated as waste.

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.

Working on a story, a paper or a partnership? We're happy to help with interviews, high-resolution images, company facts, fact-checking and on-the-record quotes. Rather than post everything publicly, we share press and reference materials directly so we can give you what's most relevant and up to date.

Email info@hyapak.com or use the contact form, and tell us what you need. We aim to reply within a day.

If you're using HyaPak material in academic or editorial 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 interviews, high-res images or fact-checking, contact info@hyapak.com. We aim to reply quickly.

Sources & further reading

Figures on this page draw on the sources below and on HyaPak's own pilot and field data (noted as such). Where estimates vary between studies, we cite the most widely used figure.

1. UNEP, Invasive Species Programme, on Eichhornia crassipes as the world's most problematic aquatic weed.
2. IPBES, Global Assessment on invasive alien species and ecosystem health.
3. Güereña et al. (2015) / Mkumbo & Marshall (2014), Lake Victoria fisheries and transport losses (~US $350 million per year).
4. CNN (2025), coverage of water hyacinth and HyaPak, global cost “more than $700 million annually.”
5. UN / OECD, plastics generated ~1.8 billion tonnes of GHGs in 2019, about 3.4% of the global total; ~98% of single-use plastic is petrochemical-derived.
6. UNEP, less than 10% of all plastic ever produced has been recycled.
7. CABI & IUCN, Eichhornia crassipes invasive species distribution.
8. HyaPak Ecotech Ltd. & Egerton University, internal material & biodegradation records (2023–2025). Summary available to partners on request.