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Algae-Filled Chambers Promoting Urban Air Purification in a Vertical Green Park

Authors:
Wolfgang Sebastian Kiehne, Cayetano Garcia Cachay, Christian Bechara
Algae-Filled Chambers Promoting Urban Air Purification in a Vertical Green Park
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Algae-filled chambers filter urban pollutants while a vertical green park enhances the microclimate, combining air purification with residential, educational, and office spaces in a multifunctional structure.
5 key facts about this project
01
Algae-filled chambers actively purify urban air.
02
A vertical park enhances local biodiversity and aesthetic value.
03
Integrated community spaces promote social interaction among users.
04
Advanced air filtration systems streamline continuous CO2 reduction.
05
Strategic design optimizes natural light and ventilation throughout.

The AirCleanser project presents an innovative approach to urban living, strategically situated in Detroit. This vertical structure combines various functions such as residential, educational, and office spaces, while also addressing essential environmental challenges. The design promotes the idea of an active skyscraper that interacts with its surroundings to enhance air quality and encourage community connection.

Air Purification Mechanism

At the heart of the AirCleanser is its air purification system, allowing the building to act as a vertical air refiner. The structure draws in polluted air, which is then directed into algae-filled chambers. This process removes CO2 and other harmful substances, responding directly to urban pollution.

Integration of Green Space

The design includes a significant midsection dedicated to a green park. This area provides both recreational space and environmental benefits. It introduces nature into the city, improving the aesthetic quality and positively affecting the local climate. This park offers a refreshing escape for residents and visitors alike, enhancing their experience in the urban setting.

Multifunctionality and Community Engagement

AirCleanser features a diverse range of spaces for living, working, and learning. This multifunctional approach meets the needs of the community while making the building a gathering place. By fostering interaction between different groups, the design highlights the importance of human connections in today’s urban landscape.

Sustainability and Material Choices

Sustainability is a key focus in the design, particularly with the use of algae in the air purification system. Algae can efficiently process carbon dioxide and produce oxygen, showcasing natural processes that have a positive impact. This choice demonstrates a commitment to ecological responsibility within the context of urban architecture.

The structure culminates in a distinct tip, marking the end of its vertical form. This feature not only stands out but also serves as a release point for cleaned air. It encapsulates the aim of combining function with environmental awareness, reinforcing its role within the urban environment.

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The Buildner’s Unbuilt Award 2025: Celebrating Architectural Creativity and Visionary Unbuilt Designs with a Total Prize Fund of €100,000

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The Buildner’s Unbuilt Award 2025 is an international architecture competition dedicated to recognizing and celebrating the value of unrealized architectural designs. It invites architects, designers, and students worldwide to submit visionary projects that have not yet been constructed, highlighting the power of ideas and the creativity behind the design process. By focusing on unbuilt work, the competition aims to bring forward concepts that shape the future of architecture and push the boundaries of the profession. 

Participants can compete in three categories based on project scale: Small Wonders (up to 100 m²), Medium Marvels (101–999 m²), and Large Visions (over 1,000 m²). Each category winner will receive €20,000, and additional prizes include honorable mentions, student awards, and a special Best Presentation Award. Winning projects will gain significant international exposure through Buildner’s publicity campaign and a feature article on ArchDaily, providing a unique opportunity to showcase creative ideas to a global audience. 

The Buildner’s Unbuilt Award 2025 encourages entrants to submit any type of unbuilt project, from conceptual visions to detailed designs, celebrating bold innovation without the constraints of realization. Important deadlines: registration closes on October 30, 2025; submissions are due by November 20, 2025; winners will be announced on December 17, 2025.

Buildner's Unbuilt Award 2025

Celebrating your unbuilt architecture visions with a €100,000 prize

100,000€ Prize / 2025 ideas COMPETITION
Prize 100,000 €
Eligibility Open to all
Final registration deadline 30 October 2025

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