“Turning Scallop Shells into Resources: A Circular Blue-Carbon Business Model Connecting the Ocean and Local Communities”

A new initiative is underway to reuse the large volume of scallop shells generated in the fisheries industry as valuable resources. The project aims to build a “circular blue-carbon business model” that reduces environmental impact while creating new industries and jobs in local communities.

In this model, scallop shells discharged from seafood processing plants are efficiently collected and pulverized into fine powder using proprietary technology. By recycling shells that were previously treated as industrial waste, the initiative seeks to reduce disposal costs and lessen environmental burdens. The resulting scallop-shell powder is used as an additive in construction materials and as a raw material for bioplastics, and it also contributes to restoring marine environments. Artificial fish reefs made from scallop shells have been developed and installed underwater, where seaweed can take root and grow on their surfaces. This growth absorbs and stores carbon dioxide, creating a “blue carbon effect,” which is expected to be utilized as carbon credits in the future.

The issue of scallop shell disposal has been a long-standing challenge in regions such as Hokkaido and Tohoku. Efforts like this—turning waste into resources while contributing to a decarbonized society—are increasingly recognized as a promising new model connecting the future of the ocean and local communities.

As scallop shell recycling progresses, attention is growing on how this renewed relationship between the sea and local regions will shape the future of the fisheries industry.