Integrating Microbial Ecology and Sustainability: Linking Agricultural Waste Gas Streams to Microbial Community Shifts in a Photobioreactor

Cone-shaped, helical photobioreactors cultivating Arthrospira platensis with chicken-house exhaust air show time-varying microbial community composition and carbon/nitrogen metabolic gene potential.

• Why it matters: Linking agricultural waste gas to photobioreactors could mitigate CO2 and NH3 while producing biomass, but microbial dynamics and nitrogen processing need time-resolved characterization.
• What they did: The study profiled microbiomes and gene-centric carbon and nitrogen metabolism over continuous exhaust-air exposure and periodic biomass harvesting, using cycle-based dissolved inorganic nitrogen balances and niche-focused analyses.
• The result: Dissolved inorganic nitrogen decreased and was only partially recovered in harvested biomass; ammonia-oxidizing microorganisms were linked to structured, low-light niches, supporting ammonia-oxidizing potential without establishing a quantitatively relevant nitrification flux.

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