From wastewater to climate impact: CREW’s carbon dioxide removal approach: POSTER

Proceedings

From wastewater to climate impact: CREW’s carbon dioxide removal approach: POSTER

Joachim Katchinoff1, Kevin Vu1, Rocco D’Ascanio1, Noah Planavsky2 1CREW Carbon, 2Yale University
(free)

Biological treatment generates concentrated biogenic CO2 that is ideal for CO2 removal (CDR)1,2,3.

• Enhanced weathering (EW) has emerged as a CDR pathway4, which can provide better pH & alkalinity management in wastewater systems.

• EW requires alkaline material with favorable lifecycle assessments, like CaCO3 (limestone), and can lock in CO2 as a benign dissolved ion (i.e., alkalinity) that will be stored in rivers and oceans for >10,000 years5.

• Within secondary treatment, hydraulic and solid residence times can inform mass balance, which will constrain EW. See Figure 1 for description of mass balance in activated sludge systems.

• We compare variability in measurements of process parameters required to constrain dissolution rate in two phases and demonstrate expected signals at full scale deployment to ensure resolvability of measurement signals.

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Proceedings