Latest Updates

Nov 22
As global water scarcity spreads and more regions begin to run out of the freshwater they need for daily life, desalination is heralded as the answer. It already provides countless people with reliable clean water, but it also carries some disadvantages as an energy-intensive process with high environmental costs.
Sep 20

LA Times

A celebrity-studded L.A. water district has a very big drought idea: Seafloor desalination

The Las Virgenes Municipal Water District recently partnered with California-based OceanWell to study the feasibility of harvesting drinking water from desalination pods placed on the ocean floor, several miles off the coast of California. The pilot project, which will begin in Las Virgenes’ reservoir near Westlake Village, hopes to establish the nation’s first-ever “blue water farm.”
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Sep 15

Sgvoice

Sgvoice: Startup profile OceanWell

OceanWell was founded in California in August 2019 by Robert Bergstrom, Charlie McGarraugh and Michael Porter, Ph.D. The company has so far received $4 million from US and European angel investors, and has signed a memorandum of understanding with Las Virgenes Municipal Water District.
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Aug 15

Press Release

OceanWell and LVMWD Announce Partnership to Pilot California’s First Blue Water Farm

The new pilot project will be the first to use OceanWell’s state-of-the-art technology to source a new supply of drinking water.
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New video introducing Ocean Well

Solving water scarcity with sustainable, affordable, and abundant, fresh water from Ocean Well’s subsea desalination technology.

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How is the OceanWell process different from current desalination methods?

Desalination is a heavy industrial process, as it is currently practiced, that removes seawater (including small organisms) from the oceans for processing on land, filters out and disposes of those organisms and other impurities in landfills, either evaporates or pressurizes the filtered seawater, squeezes out as much fresh water as technically possible, and then disposes of a doubly-salty brine back into the sea where it can be toxic.

OceanWell uses a passive process driven by natural forces to harvest fresh water from the relatively lifeless deep sea:

It does not kill small organisms with chemicals. It uses the same reverse osmosis membranes as onshore desalination plants, but allows microscopic lifeforms to pass through the process unharmed.

It does not produce toxic brine. The feed seawater is not pressurized and only small amounts of fresh water are extracted, allowing its seawater discharge to stay near ambient pressure and salinity, such that is not toxic in any way. In fact, according to the California Ocean Plan, “discharges shall not exceed a daily maximum of 2.0 parts per thousand (ppt) above natural background salinity measured no further than 100 meters (328 ft) horizontally from each discharge point.” This equates to 5.7% above a 35 ppt background salinity typical in California. The Ocean Well maintains a discharge of only 5% above ambient ocean salinity, thus never producing “brine”.

It does not heat or pressurize the feed seawater. While it does pressurize the harvested fresh water in order to deliver it to shore, there is no marine life in the fresh water and this design cuts pressurization requirements in half, meaning lower energy requirements, lower carbon production, and lower operating costs.

Will OceanWell help or hurt the earth and oceans?

The OceanWell system was intentionally designed to help the earth and oceans, inspired by the multiple functions of a mangrove root system: Its supports life on earth, using reverse osmosis membrane barriers to lightly draw fresh water from the relatively lifeless deep sea for use on land.It supports life in the oceans, by creating nutrient-rich habitats to feed marine life and subsea infrastructure to power ocean monitoring systems for learning more about the deep sea.

OceanWell will help rebalance Earth’s water cycle: As global temperatures rise, the moisture-holding capacity of Earth’s atmosphere increases, and climatological and hydrological patterns change. These changes may cause increases in global precipitation, more concentrated over the oceans than land, leading to increased aridification in many of today’s most habitable regions of Earth, including parts of North America, Eurasia, and Australia. For life as we know it to continue, we need to fix the broken water cycle and rebalance the distribution of our planet’s fresh water supply to sustain life on Earth.

Will it raise the cost of fresh water?

OceanWell water will cost less, at a large scale, compared to today’s best desalination technologies in locations with deep seawater close to shore. Water prices are rising around the world as “free” sources of fresh water become exhausted: The Ocean Well cannot produce “free” water, but it uses up to 40% less energy per cubic meter produced than seawater desalination.

Depending on location, OceanWell water may even be priced lower than stormwater capture, recycled wastewater, imported water, brackish desalination, and some conservation efforts. As an added bonus, OceanWell produces very cold water that can be used in once-through cooling applications before it’s consumed as drinking water, thus offsetting cooling costs. Synergies with other offshore renewables and climate technologies, such as wind power and carbon capture, may provide opportunities to further cut the cost of fresh water.

Why has this not been done before?

OceanWell combines proven technologies from the offshore energy and desalination industries: While the desalination sector has been relatively stagnant since its last major innovation in the late-1990s, the offshore energy sector is relatively young with major innovations in subsea systems occurring in the late-2010s.

The principles behind subsea reverse osmosis were theorized decades ago, but were technically infeasible, until now. Now, because of the development of reliable subsea technologies, the Ocean Well is not only feasible, but offers favorable economies of scale and unprecedented ecological benefits.

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