enhanced-weathering
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CREW Carbon
CREW Carbon is a Yale-spinout water and climate technology company based in Hamden, Connecticut. It retrofits municipal and industrial wastewater treatment plants with a closed-system enhanced-weathering process: dosing alkaline minerals into wastewater to convert dissolved CO2 into stable bicarbonate. The approach lowers operating costs and improves treatment performance for utilities while permanently and measurably removing atmospheric carbon, which it sells to corporate buyers as durable carbon removal credits.
Joachim Katchinoff
Joachim Katchinoff is a Yale-trained biogeochemist who co-founded CREW Carbon to turn ordinary wastewater treatment plants into permanent carbon-removal machines. By dosing treatment tanks with crushed alkaline minerals, CREW converts the CO2 that microbes naturally belch into stable bicarbonate, while cutting chemical costs for utilities. The company became the first in the world to issue certified Wastewater Alkalinity Enhancement carbon credits and raised a $25M Series A in 2026 to scale across the US and Europe.