COULD SEAWEEDS BE THE FUTURE OF PLASTIC?

 COULD SEAWEEDS BE THE FUTURE OF PLASTIC?

I am very fascinated by that question, for two very important reasons. First, what could this mean for the thousands of Filipino seaweed farmers who depend on this commodity for their livelihood? And second, what could this mean for our environment—now drowning in millions of pieces of plastic that pollute our lands, seas, and oceans every single day? Add to that the alarming truth that microplastics are already entering our bodies through the food chain. If there was ever a moment to rethink plastic, it’s now.

God has blessed our country with long coastlines and wide open seas. We are, in fact, one of the world’s top producers of seaweeds. So imagine for a moment if seaweeds could replace plastic. Imagine if something that has become a global burden—plastic—could be replaced by something that grows naturally, renewably, and abundantly right here in our coastal waters.

What has caused us problems all these decades could suddenly present us with an opportunity.

So what should we do next? Clearly, this is something that belongs in the portfolio of the Department of Science and Technology (DOST). But other agencies must also jump in. The DFA, if we need access to patents or licensing arrangements. The DTI, if we want investors or partnerships with companies already leading the technology. And how about the plastics industry—can they transition quickly into seaweed-based materials? And if the technology requires new skillsets, do we need to start producing new types of engineers?

At the production level, BFAR should help identify which species of seaweeds grow best for this purpose. Should we focus on kelp? Eucheuma? Gracilaria? Science must guide farming.

But the potential is certainly exciting.

Why Seaweed Could Be the Future of Plastic

Seaweed-based bioplastics are biodegradable, compostable, and non-toxic. They can break down naturally in soil or water, unlike petroleum-based plastics that persist for centuries. Seaweed grows extremely fast—some species up to one meter per day—and requires no fertilizers, no freshwater, and no land. It even absorbs carbon dioxide as it grows, giving it climate benefits on top of everything else.

Best of all, some seaweed bioplastics are edible. Imagine buying a drink in a sachet you can swallow. This is not science fiction—companies like Notpla and Sway are already doing it. There are seaweed-based films for food packaging, coatings for fast-food wrappers, molded containers, and even textile fibers under development.

Universities and innovation labs, such as Flinders University working with the biotech firm one • five, have developed sodium alginate coatings that can replace polyethylene in common wrappers. Beyond packaging, seaweed is also being explored for biofuels and sustainable fabrics.

But there are challenges. Right now, seaweed bioplastics remain more expensive than petroleum-based plastics. Scaling up farming must be done without harming marine ecosystems. And some products may lack the long-term durability needed for certain industrial uses.

Still, the opportunity is enormous.

For coastal countries like ours, seaweed represents a systems-level solution—a chance to strengthen livelihoods, reduce plastic pollution, and create a circular economy all at once. Imagine barangay-level seaweed farming cooperatives producing biodegradable packaging for local businesses. Imagine LGUs shifting their procurement to seaweed-based materials. Imagine our coastal communities becoming hubs of green manufacturing.

Could seaweeds be the future of plastic?
If we make the right decisions today, the answer could very well be yes.

RAMON IKE V. SENERES

www.facebook.com/ike.seneres iseneres@yahoo.com senseneres.blogspot.com 09088877282/ 07-14-2026