Everything you need to know about Zygreen and our technology.
ZyGreen takes its name from "Zy" — cyanobacteria and microalgae, the living organisms at the core of the technology. At its core, ZyGreen is the use of cyanobacteria and microalgae to make indoor spaces greener and healthier.
ZyGreen technology combines living microalgae with multilayer filtration to trap airborne pollutants — particulate matter, VOCs, and toxic gases like CO2 — in a single system. As the microalgae process these pollutants, they release oxygen back into the space, actively boosting its freshness rather than simply filtering the air that passes through.
A standard HEPA purifier only filters particulate matter — dust, pollen, PM2.5 — by pulling air through a physical mesh. It cannot touch carbon dioxide, and it only removes; it produces nothing. ZyGreen's hybrid system pairs multilayer HEPA filtration with a living microalgal photobioreactor: the HEPA stage handles particulates the way any purifier would, while the algae layer continuously engages with ambient CO2 through photosynthesis and releases oxygen as a byproduct. It's two purification mechanisms — mechanical filtration and biological gas exchange — in one unit instead of one.
Yes — this is one of the more consistently replicated findings in indoor air quality research, not a purifier marketing claim. ASHRAE recommends keeping indoor CO2 below 1,000 ppm, yet independent classroom studies routinely measure 2,000–3,000+ ppm in occupied rooms with 20 or more students and doors and windows shut. Research from Harvard's T.H. Chan School of Public Health has linked rising indoor CO2 to measurable drops in cognitive test scores, and a Lawrence Berkeley National Laboratory study found elevated CO2 impaired adult decision-making performance. For AC-run offices and schools, this is a measurable risk factor, not a hypothetical one. That’s why Scientists recommend Zygreen
Yes — the HEPA stage is a full multilayer filtration system, not a token add-on to the algae component. It captures fine particulates, dust, and pollen the same way a standalone HEPA purifier would; the photobioreactor sits alongside it as a second, independent purification pathway rather than replacing any particulate filtration. Institutions get both mechanisms in one footprint instead of running a HEPA unit and a separate CO2 solution side by side.
Yes, research and some companies like Zygreen are using microalgae cultures to take in CO2 and release oxygen indoors. Performance depends on the design, the species, the light and the room.