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Microalgae Bioreactor and Etfe Facade in Sustainable Desert Living

Authors:
Sanja Tiedemann, Shreeya Radia, Petros Ioannou
Microalgae Bioreactor and Etfe Facade in Sustainable Desert Living
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Integrating a microalgae bioreactor and an ETFE facade, this sustainable living space utilizes advanced materials and systems to effectively address water scarcity and energy efficiency in a desert environment.
5 key facts about this project
01
Incorporates a microalgae bioreactor for CO2 absorption and protein production.
02
Features an ETFE membrane facade that optimizes light transmission and insulation.
03
Utilizes a flexible layout that enhances community interaction while offering private retreats.
04
Integrates a rainwater harvesting system to address water scarcity in arid environments.
05
Employs an aluminum exoskeleton for rapid assembly and structural efficiency.

The Saguaro architectural project addresses the challenges posed by climate change within a desert environment. It is designed to serve as a sustainable living space that promotes resilience and adaptability in the face of extreme weather conditions. The project emphasizes a harmonious relationship between built and natural environments while prioritizing energy efficiency and resource conservation. Key elements feature innovative materials and systems aimed at reducing environmental impact and enhancing livability.

Design Innovations and Material Use

The project's fundamental design approach incorporates an exoskeleton crafted from lightweight aluminum, which ensures rapid assembly and structural integrity. This framework is complemented by a façade constructed from ETFE (Ethylene Tetrafluoroethylene) membrane. This material allows for high light transmission and effective insulation, optimizing energy use while creating a connection to the external environment. The dual properties of the ETFE façade enhance the building's thermal performance and adaptability to changing weather conditions.

A distinctive feature of Saguaro is the integration of a central column that serves both structural and functional purposes. This column houses essential utilities and offers a visually unified element that organizes the interior layout. It also facilitates passive energy strategies while providing spaces for rainwater collection, a critical component in desert regions where water scarcity is prevalent.

Furthermore, the incorporation of microalgae bioreactors marks a significant innovation within the project's design framework. These bioreactors act as both aesthetic and functional installations, contributing to air purification and creating a sustainable source of protein for occupants. This approach exemplifies a broader commitment to integrating natural systems within architectural design, demonstrating how sustainability can be harnessed through innovative technologies.

Sustainability-focused Systems

Saguaro employs multiple sustainability strategies that reflect an overarching goal of reducing ecological footprints. The project features a robust rainwater harvesting system, enabling effective utilization of natural resources. This system collects and stores rainwater for irrigation and domestic use, significantly lessening reliance on municipal supplies.

The incorporation of photovoltaic systems facilitates renewable energy generation, supporting the building's energy needs and further minimizing its environmental impact. Natural ventilation strategies are integral to the design, with strategically placed openings allowing for airflow that reduces the dependency on artificial climate control systems.

The spatial organization within Saguaro is also noteworthy, characterized by flexible layouts that facilitate multifunctional use. The design encourages community interaction while also providing personal retreats, a balance that is essential in modern living spaces.

The Saguaro project exemplifies a thoughtful integration of architecture and technology, with a focus on sustainable practices. To gain a deeper understanding of the architectural plans, sections, and design ideas, interested readers are encouraged to explore the project's detailed presentation for comprehensive insights into its innovative features and architectural considerations.

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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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Competition organisers

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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