Liquid3
{{Tone|article|{{April 2024}}|date=April 2024}}
{{Short description|Clean energy photobioreactor project}}
Liquid 3 (also known as Liquid Trees) is a clean energy photobioreactor project designed to replace the function of trees in heavily polluted urban areas where planting and growing real vegetation is not viable.
The project was designed by the Institute for Multidisciplinary Research at the University of Belgrade. The United Nations Development Programme (UNDP) selected Liquid 3 as an "innovative" solution for "Climate Smart Urban Development," a project produced in partnership with Serbia's Ministry of Environmental Protection and the municipality of Stari Grad.{{Cite web |title=The first algae air purifier in Serbia {{!}} United Nations Development Programme |url=https://www.undp.org/serbia/news/first-algae-air-purifier-serbia |access-date=2023-11-09 |website=UNDP |language=en}}
{{Infobox company
| logo = L3logo.png
| image =
| founded = September 2021
| founder = Ivan Spasojevic
| area_served = Belgrade, Serbia
| website = https://liquid3.rs/
}}
Overview
The Liquid3 algal photobioreactor is powered by solar panels. The glass tank is embedded into a structure that acts as a bench and is outfitted with other utilities such as charging ports. Similar to other photobioreactors, air is sucked through a pressure pump and fed to the microalgae, with oxygen released as a byproduct. Additionally, the Liquid 3 bioreactor can filter out heavy metal contaminants in the air and contains a temperature regulation system in case external climate conditions become too extreme for the microalgae.{{Cite web |last=Krieger |first=Benno |date=2022-11-25 |title=Liquid tree to combat air pollution in Belgrade |url=https://balkangreenenergynews.com/liquid-tree-to-combat-air-pollution-in-belgrade/ |access-date=2023-11-09 |website=Balkan Green Energy News |language=en-US}}{{Cite journal |last1=Villalba |first1=María Rosa |last2=Cervera |first2=Rosa |last3=Sánchez |first3=Javier |date=2023-06-16 |title=Green Solutions for Urban Sustainability: Photobioreactors for Algae Cultivation on Façades and Artificial Trees |journal=Buildings |language=en |publication-date=16 June 2023 |volume=13 |issue=6 |pages=1541 |doi=10.3390/buildings13061541 |issn=2075-5309|doi-access=free }}{{Cite web |date=2023-04-10 |title=How Liquid Trees Could Help to Clean Up Our Urban Jungles |url=https://en.reset.org/how-liquid-trees-could-help-to-clean-up-our-urban-jungles/ |access-date=2023-11-09 |website=Digital for Good {{!}} RESET.ORG |language=en-US}} The creator of the Liquid 3, Dr. Ivan Spasojevic, was motivated to install it in Belgrade due to the city's struggle with pollution.{{Cite web |title=Liquid Tree: the Future for Cleaner Air |url=https://biotech.dpu.edu.in/blogs/liquid-tree-the-dystopian-bush-is-here |access-date=2023-11-09 |website=Dr. D. Y. Patil Biotechnology & Bioinformatics Institute, Pune |language=en}}