the win-win the world needs
Providing a safer, more cost-effective alkalinity solution to improve wastewater treatment performance and removing greenhouse gasses to offset corporate footprints
CREW improves municipal and industrial wastewater treatment to remove greenhouse gasses at scale.
Our alkalinity enhancement technology involves the data-enabled dosing of minerals such as calcium carbonate (otherwise known as limestone) in wastewater treatment reactors 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.
The CREW system
Seamless integration into wastewater treatment
We improve wastewater operations while providing affordable, measurable, and permanent greenhouse gas 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 treatment improvement and carbon removal, 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 leverages alkalinity enhancement for better wastewater treatment and carbon dioxide removal.
Detail view of primary treatment
Atmospheric CO2 and nutrients
Nutrients in wastewater, including carbon, nitrogen, and phosphorus, require biological treatment, which produces process emissions like biogenic CO2.
Calcium carbonate dosed
Calcium carbonate (otherwise known as limestone) is an abundant, naturally occurring mineral.
Calcium carbonate dissolves
Calcium carbonate dissolves during biological treatment, buffering pH and alkalinity, optimizing biological nutrient removal and sludge settleability, and converting carbon dioxide into a stable, dissolved bicarbonate ion.
Improved effluent quality
Reduced nutrient and solids loading, stabilized pH, and inert bicarbonate 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 alkalinity 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.
CREW’s weathering technology is moving us closer to achieving our climate goals by speeding up a natural 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
