CREW Wastewater Process Intensification

CREW Carbon is a US company with offices in Brooklyn, New York and New Haven, Connecticut, described in news cited on its site as a Yale spinout. It offers wastewater treatment plants a process intensification solution that improves performance, lowers costs and removes greenhouse gases.

The technology uses a primary sensor to read inlet chemistry and doses locally sourced calcium carbonate, which dissolves during biological treatment and converts CO2 into dissolved bicarbonate. A secondary sensor at the outlet measures treatment improvement and total CO2 removed. Partners named on the site include Hampton Roads Sanitation District, with carbon removal buyers reached through Frontier and ClimeFi.

• Alkalinity enhancement: doses calcium carbonate to raise alkalinity in biological treatment.
• Inlet sensing: measures real-time wastewater chemistry to set dosing.
• Outlet monitoring: quantifies treatment gains and total CO2 removed.
• Nutrient removal support: improves biological nutrient removal and settleability.
• Carbon removal projects: links wastewater operators with carbon removal buyers.

Process upgrades at municipal wastewater plants that need better nutrient removal. Industrial park wastewater plants seeking to defer capital expansion. Pilots that generate verified carbon removal from existing treatment processes.

Improves biological nutrient removal and sludge settleability. Reduces chemical and coagulant use and can lower capital needs for plant upgrades. Stabilizes pH and reduces nutrient and solids loading. Measures CO2 removal with inlet and outlet monitoring, which can generate carbon removal credits.

Wastewater utilities face tighter nutrient limits and rising upgrade costs while looking for lower-emission operations. Carbon removal buyers seek measurable, verifiable projects. Vietnamese industrial parks and city wastewater plants are expanding capacity and may look for lower-cost process upgrades.

Offices in Brooklyn, NY and New Haven, CT. Funding round of USD 25 million reported in May 2026 by third-party news (not on the company page). Frontier and ClimeFi named as carbon removal channels.