Ennesys use CO2, sunlight and microalgae to purify wastewater, produce clean energy, and produce fertilizer.
In opaque bioreactors placed on building roofs or façades, algae grow in sunlight, fed by nutrients in wastewater. Water is purified to international standards allowing for irrigation and sanitation uses, and the algal biomass increases. After separation, the algal biomass can be converted to biogas and bio-boosting fertilizer.
Depending on the installation, the tubular bioreactors can also be incorporated into the building’s heating system, providing solar thermal qualities to improve their thermal behavior and reduce heating costs.
Why you should care
Combining wastewater purification and clean energy production, Ennesys’ technology allows city districts to recycle their organic waste and produce energy to cover local consumption. The low cost of the energy generated and the wastewater treated makes the technology scalable to other settings, particularly where decentralized wastewater treatment is required.