India
SEAL is a bouy that uses waves create electricty. It uses that energy to split seawater into Sodium Hydroxide that neutralizes acid. Its a self-powered kidney that fights ocean acidification passively,with zero emmisions
Design & Implementation
Last update: October 05, 2023
Ocean acidification is a geochemical crisis. Since 2025, it has been officially recognized as the seventh planetary boundary breached, signaling that human activity has pushed ocean chemistry beyond the safe operating space for civilization.
In many regions, the water is becoming so corrosive that it is no longer just a matter of difficulty in building shells; existing structures are literally dissolving. This is most visible in the world's coral reefs, which support a quarter of all marine life despite covering less than one percent of the seafloor. As acidification weakens the framework of these reefs, they become brittle and less resilient to storm damage and bleaching, leading to a loss of habitat that triggers a domino effect throughout the entire ecosystem. The crisis extends to the very base of the marine food web, affecting pteropods—tiny sea snails that serve as a foundational food source for salmon, herring, and whales. Laboratory and field observations have already documented pteropod shells thinning and pitting in localized "corrosive" patches of the Pacific Ocean, signaling a potential collapse of fisheries that billions of people rely on for protein.
Beyond the biological destruction, ocean acidification is a socio-economic catastrophe in the making. Coastal communities worldwide depend on healthy marine ecosystems for storm protection, tourism, and food security. Coral reefs, for instance, act as natural breakwaters that dissipate up to 97% of wave energy; as they dissolve, coastal erosion and the cost of man-made sea defenses will skyrocket. Furthermore, the multi-billion dollar shellfish industry is already seeing the effects, with oyster hatcheries along the Pacific Coast of North America experiencing massive larval die-offs linked to upwelling acidic waters. This is not a slow-moving threat that can be easily reversed; the current rate of acidification is estimated to be ten times faster than any change the ocean has experienced in over 50 million years. This speed outpaces the ability of most species to adapt through evolution, meaning we are witnessing a mass extinction event in real-time. Because the ocean has a long "memory," the acidity we are adding today will take thousands of years to naturally neutralize through the slow weathering of rocks, making immediate technological interventions like S.E.A.L. not just beneficial, but a biological necessity for the survival of the blue planet.
Current efforts to mitigate ocean acidification, known as Ocean Alkalinity Enhancement (OAE), rely almost exclusively on industrial interventions. Traditional methods involve mining billions of tons of silicate rocks or crushed limestone, grinding them into fine powders, and chartering massive ships to dump these minerals into the open sea. While chemically effective, this approach is logistically impossible to scale; it carries a heavy carbon footprint from industrial mining and transportation, and risks creating chemical shock zones where localized mineral concentrations can harm the very marine life they intend to save.
S.E.A.L. (Self-Powered Electrolytic Alkalinity Loop) replaces this destructive logistics chain with an autonomous, passive infrastructure. Instead of bringing chemicals to the ocean, S.E.A.L. harvests renewable Blue Energy directly from its environment. Using Liquid-Solid Triboelectric Nanogenerators (TENGs), the buoy converts the kinetic friction of passing waves into a sustainable electrical current. This eliminates the need for fossil-fuel-powered ships or toxic batteries, allowing the buoy to operate as a self-sustaining power station in remote reef locations.
This harvested energy is then channeled into Bipolar Membrane Electrodialysis (BPMED), where seawater is dissociated at a molecular level. By applying a precise 0.83V, the system splits water into Hydrochloric Acid (which is to be sold to allow production of more bouys) and Sodium Hydroxide. S.E.A.L. then releases a gentle, controlled "halo" of the Sodium Hydroxide to stabilize the local pH and restore the carbonate saturation state essential for coral and shellfish growth. By transforming the ocean’s own destructive energy into a surgical chemical cure, S.E.A.L. provides a zero-carbon, passive, scalable shield that protects marine biodiversity without the environmental or financial costs of industrial dredging and dumping.
The S.E.A.L. project is designed to move beyond theoretical research into measurable marine restoration. We aim to achieve the following three-tier impact:
The primary biological outcome is the stabilization of the Carbonate Saturation State . By maintaining a pH , we expect to see:
Increased Calcification Rates: A measurable 15-25% boost in the skeletal growth of primary reef-builders like Acropora corals.
Recruit Survivorship: Higher survival rates for coral larvae and shellfish, which are most vulnerable to acidic osteoporosis.
Biodiversity Anchoring: Prevention of macroalgal phase shifts, ensuring reefs remain coral-dominated habitats for fish and local fisheries.
A successful outcome for the S.E.A.L. prototype is the demonstration of a "Net-Zero Restoration Cycle." We aim to prove that:
Energy Self-Sufficiency: The Liquid-Solid TENGs can consistently generate the 0.83V required for electrolysis using only average wave heights (0.5m - 1.2m).
Continuous Operation: The system can run for 2+ years without human intervention for maintainance, toxic battery replacements, or mineral refills
While S.E.A.L. focuses on local reef protection, it contributes to global Carbon Dioxide Removal (CDR).
CO2 Drawdown: By increasing surface alkalinity, each buoy creates a localized "carbon sink." As the base Sodium Hydroxide neutralizes the water, it allows the ocean to absorb more atmospheric Carbon Dioxide and convert it into stable, long-term bicarbonates.
Scalable Logistics: Our goal is to demonstrate a cost-per-ton of alkalinity that is 40% lower than traditional ship-based mineral dumping by eliminating the costs of mining, grinding, and fuel.
We plan to neutralise 7,800 Kg's of ocean water in one year.
