Long Beach, CA – A modular, origami-inspired aquaculture system could help move seaweed farming into the open ocean, where strong currents and scarce nutrients have historically limited scale, according to a study published on 28 September 2026 in Environmental Science and Ecotechnology. The research, led by scientists at Zhejiang University with collaborators at Guizhou University and the Ningbo Innovation Center, introduces the Seaweed Origami-inspired Aquaculture System (Seaweed OAS), a design that uses a shell-core structure to slow local flow, provide attachment surfaces, and store slow-release nutrients.
Seaweed aquaculture is increasingly recognized as a nature-based climate solution. Macroalgae contribute roughly 1.5 petagrams of carbon to global annual net primary production, and farm sediments can bury about 1.87 ± 0.73 tons of carbon dioxide equivalent per hectare per year—about twice the rate of adjacent non-farmed areas. Yet open-ocean expansion is limited by strong currents that prevent stable attachment and destroy the low-velocity conditions needed for growth. Nutrients such as nitrogen, phosphorus, and dissolved iron are too dilute for large-scale cultivation. Existing platforms either depend on scarce offshore infrastructure or cannot regulate local flow.
The Seaweed OAS addresses these challenges through geometry. Inspired by the traditional Chinese huiwen (fret) pattern, researchers folded flat panels into a 25-sided variant pentagonal unit. Twelve units assemble into a dodecahedron-like shell. Simulations tested scaling ratios from 0.28 to 0.56, with an optimal single-unit design at 0.36. At 2.0 m s⁻¹ inflow, it produced 2,607.7 cm³ of suitable growth volume, and the best single-unit result reached 2,791.6 cm³—17 times a spherical reference. In a six-unit Hexagon 2 layout with 0.35 m spacing, total suitable volume reached 33,210.3 cm³ at 2.0 m s⁻¹, or 5,535.1 cm³ per unit, 2.1 times an isolated unit. Compression tests gave a minimum peak load of 11,693 N versus a predicted peak drag of 39.9 N, a safety factor of 293.
Laboratory, lake, and open-ocean trials supported stability, including during wave impacts in the Philippine Trench region. Global mapping estimated 10,335 million hectares—28.5% of the global ocean—as potentially suitable. The authors said the design turns an ancient folding idea into a practical marine tool. "By reshaping flow around each module, the system creates quiet microhabitats where seaweed can attach and grow, while the same module stores slow-release nutrients," they said. They added that cooperative wake interactions can amplify performance: the optimized hexagonal array lets upstream units shield downstream units, increasing suitable growth volume per unit.
Still, the authors cautioned that long-term cultivation outcomes, deep-ocean carbon storage, and the ecological effects of material degradation remain unverified and require field study. If validated over longer deployments, the Seaweed OAS could support open-ocean seaweed cultivation for food, feed, biomaterials, and carbon sequestration. Its modular shell-core design may be deployed without existing offshore infrastructure, and connection modules with controllable degradation could eventually let the system break apart so carbon-rich biomass sinks to the deep ocean for long-term storage. The study was published (DOI: 10.1016/j.ese.2026.100769) and was financially supported by the National Key R&D Program of China, the National Natural Science Foundation of China, and other provincial and university funds.
For Long Beach and the surrounding area, a port city with a growing blue economy and a strong focus on climate resilience, such innovations could open new avenues for research, investment, and collaboration. The region’s marine research institutions and technology companies might find opportunities to test or adapt similar systems, potentially spurring local job creation in sustainable aquaculture and marine engineering. As the world seeks scalable carbon removal strategies, this origami-inspired approach highlights how interdisciplinary design can tackle complex environmental challenges, with implications for food security, biomaterials, and climate mitigation. More information about the innovation ecosystem supporting such developments can be found at http://chuanlink-innovations.com.
