the win-win the world needs
Our dual-benefit approach to carbon removal
CREW Carbon improves municipal and industrial wastewater treatment to solve the planet’s CO2 problem.
Our engineered enhanced weathering technology doses wastewater with minerals such as calcium carbonate (otherwise known as limestone) to provide efficient and cost-effective alkalinity treatment while permanently converting carbon dioxide into inert, dissolved bicarbonate ions.
Wastewater facilities get optimized treatment, carbon buyers get high-quality credits, and the planet gets less greenhouse gasses. Here’s how we do it.
The CREW system
Seamless integration into wastewater treatment
We improve wastewater operations while providing affordable, measurable, and permanent carbon dioxide removal.
Wastewater enters treatment
Atmospheric CO2 from food and other sources is converted to carbon-rich biomass waste.
Primary sensor and inlet monitoring
Our patented monitoring approach and sensor systems measure real-time chemistry of carbon-rich wastewater to determine dosing needs and initial CO2 content.
Mineral storage and dosing
CREW uses locally-sourced calcium carbonate to effectively treat wastewater and permanently convert CO2 into a dissolved bicarbonate ion.
Secondary sensor and outlet monitoring
Post-treatment measurement accurately quantifies carbon removed and stabilization of pH and alkalinity, providing best-in-class verification of process benefits and total CO2 removed.
Treated wastewater is discharged
Treated wastewater is discharged to oceans, rivers or aquifers. CO2 is locked in and stored for thousands of years.
A look inside the process
CREW engineers enhanced weathering for better wastewater treatment and carbon dioxide removal.
Detail view of primary treatment
Atmospheric CO2
Atmospheric CO2 is present in wastewater as a byproduct from the breakdown of biological waste.
Calcium carbonate feedstock added
Calcium carbonate (otherwise known as limestone) is an abundant, naturally occurring mineral.
Calcium carbonate reacts with CO2
Calcium carbonate dissolves when it reacts with CO2 — converting carbon dioxide into a stable, dissolved bicarbonate ion.
Bicarbonate discharged
This environmentally inert bicarbonate is discharged to oceans, rivers, or aquifers, where it stores locked-in CO2 safely for thousands of years.
Sustainable science
Engineered for the Earth
Weathering is the natural process by which minerals react with the environment over geologic timescales, trapping carbon from rainfall and throughout Earth’s water cycle.
CREW’s enhanced weathering approach simply accelerates the planet’s natural healing process and applies it to wastewater treatment.
By converting carbon dioxide into an environmentally inert bicarbonate ion, we effectively turn greenhouse gases into a stable and beneficial compound that can support marine life such as corals and shellfish.
Scientific collaborators and advisors
CREW technology was developed at Yale and is supported by a team of leading scientific and strategic advisors from industry, environmental agencies and research institutions.
Tackling the climate crisis requires creativity. CREW’s promising approach offers a new way to safely repurpose naturally available minerals into practical tools that remove and store carbon dioxide from wastewater. Their eco-friendly weathering technology is moving us closer to achieving our climate goals by speeding up a process that would otherwise take millions of years, and I look forward to seeing their impact in our state continue to grow.
U.S. Senator, Chris Murphy
