Engineering Wastewater to Remove CO2
CREW technology makes wastewater treatment safer and more efficient while permanently capturing greenhouse gases.
Our solution
CREW partners with wastewater facilities to seamlessly introduce natural minerals into the treatment process, which dissolve and permanently lock CO2 into a stable ion that is environmentally inert.
This approach improves wastewater treatment by removing the cost barrier for typical pH and alkalinity optimization and providing safer, more effective process improvements.
Wastewater intake
Atmospheric CO2 from food and other sources is converted to carbon-rich biomass waste.
Waste is delivered to primary wastewater treatment
Primary sensor/monitoring station
CREW measures carbon levels in wastewater to determine appropriate dosing
Mineral feedstock supply
During secondary treatment, CREW doses with crushed limestone, which permanently traps carbon dioxide in an environmentally sound, dissolved bicarbonate ion.
Secondary sensor/monitoring station
Testing occurs again post-treatment to ensure accurate monitoring and reporting of carbon capture.
Bicarbonate discharge
Treated wastewater is discharged to oceans, rivers or aquifers
CO2 is locked in and stored for thousands of years
Carbon Facts
34B
Gallons of wastewater treated daily in the US alone.
100K
Wastewater treatment plants operating across the globe.
1-3
GIGATONS
Amount of CO2 and other greenhouse gasses estimated to flow through municipal and industrial wastewater treatment sites every year.
230
MILLION
Equivalent number of gasoline-burning cars removed from the road by capturing carbon from wastewater plants.
Operational benefits for our partners
Cost savings
We provide significant savings relative to conventional methods for neutralization, buffering capacity, and alkalinity.
Enhanced safety
Our process decreases risk exposure for operators by replacing conventional chemicals for pH control.
Efficient compliance
CREW technology stabilizes biological and nutrient treatment to help facilities meet stringent permit regulations.
Climate action
We empower plants with a novel resource recovery pathway for CO2, while reducing their existing carbon footprint.
Advantages of our Carbon Dioxide Removal (CDR) process
Closed-system measurement
Compared to traditional enhanced weathering or alkalinity enhancement, our closed-system approach deploys input and output sensor arrays to allow for extremely precise monitoring, reporting, and verification (MRV) of carbon removal.
Immediately deployable and scalable
We utilize existing wastewater infrastructure, existing permits, and widely abundant minerals to deploy faster and at a fraction of the cost of other CDR methods.
Continuous and permanent
We provide durable, year-round CDR that is permanently stored as a stable form of dissolved bicarbonate.
Highlighted projects
Our patented technology was developed at Yale University and piloted in 2022 at a 40 million gallon-per-day municipal utility in the Northeast US. CREW is stabilizing and improving biological treatment while consistently and permanently capturing a nameplate capacity of 4000 tons of CO2 annually.
In the Southeast US, CREW is working with an 18 million gallon-per-day utility to improve and expand existing alkalinity dosing. Our plug-and-play approach will increase and stabilize key environmental conditions like alkalinity and pH, which can improve biological treatment and pollution removal. CREW’s model enables significantly reduced operational costs, while capturing a nameplate capacity of 2000 tons of CO2 annually.
Our partners
Our customers and collaborators are experts in academic research, water management, wastewater engineering and environmental science, as well as high-quality carbon credit buyers like the Frontier Climate Fund.
News
CREW Carbon Announces $32M Offtake Agreement with Frontier Buyers
In partnership with Frontier buyers, CREW Carbon has signed a $32 million offtake agreement to remove 71,878 tons of CO2 between 2025 and 2030. Buyers include leading companies Stripe, Alphabet, Shopify, JP MorganChase, McKinsey, Autodesk, H&M Group, Workday, Watershed and Salesforce.
Climate tech firms get $80 million to pull carbon from paper mills, sewage
CREW Carbon provides the opportunity for large industrial players to integrate carbon removal technologies and start to deliver carbon removal cheaply and at scale.
Murphy Highlights New Haven’s CREW Carbon As “Innovator of the Month”
U.S. Senator Chris Murphy (D-Conn.) announced on Monday that CREW Carbon, a carbon dioxide (CO2) removal company based in New Haven, was named “Innovator of the Month.”
CREW Carbon among Carbon Dioxide Removal Purchase Pilot Prize Phase 1 Semifinalists
CREW is honored to be included alongside remarkable technologies.
