Ultra-broadband coherent open-path spectroscopy for multi-gas monitoring in wastewater treatment.

ABSTRACT: Wastewater treatment plants significantly contribute to greenhouse gas emissions, including nitrous oxide (N₂O), carbon dioxide (CO₂), and methane (CH₄). Current methods to measure these emissions typically target specific molecular compounds, providing limited scope and potentially incomplete emissions profiles. Here, we show an innovative ultra-broadband coherent open-path spectroscopy (COPS) system capable of simultaneously monitoring multiple greenhouse gases. This novel approach combines Fourier transform spectroscopy with a coherent, ultra-broadband mid-infrared light source spanning 2-11.5 μm at approximately 3 W power. Positioned above an aeration tank, the COPS system selectively detected absorption signatures for CH₄, CO₂, N<

SUBMITTER: Krebbers R 

PROVIDER: S-EPMC11987694 | biostudies-literature | 2025 May

REPOSITORIES: biostudies-literature