SciTransfer
Mi-Hy · Project

Circular Urban Farming System Using Wastewater to Generate Electricity and Fertilizer

environmentTestedTRL 4

Imagine a garden that feeds itself using old sewage water instead of expensive chemicals. It uses special bacteria that act like a biological battery, cleaning the water and creating a small amount of electricity to power grow lights. It basically turns waste into food and energy in one closed loop.

By the numbers
1.2 L
liquid fertilizer produced per 48h
2.5 L
untreated sewage processed
1 mW
average power output (synthetic urine)
0.85 mW
average power output (sewage)
40
MFC units fabricated
The business problem

What needed solving

Urban agriculture relies heavily on expensive, polluting chemical fertilizers and external energy sources for lighting and water management.

The solution

What was built

A bioelectrochemical platform consisting of 40 MFC modules that convert wastewater into electricity and liquid fertilizer.

Audience

Who needs this

Vertical farming operatorsMunicipal wastewater treatment plantsEco-city urban plannersSustainable hydroponic equipment manufacturers
Business applications

Who can put this to work

Urban Agriculture
SME
Target: Vertical Farming Startup

If you are a vertical farm dealing with high chemical fertilizer costs — this project developed a prosthetic rhizosphere that recovers nitrogen from wastewater. This reduces reliance on synthetic inputs while producing food and animal feed.

Water Management
enterprise
Target: Municipal Wastewater Treatment Plant

If you are a utility provider dealing with nitrogen pollution in sewage — this project developed MFC modules that can process 2.5 L of untreated sewage into 1.2 L of liquid fertilizer every 48 hours.

Green Building
mid-size
Target: Sustainable Architecture Firm

If you are a developer dealing with energy-intensive urban greenery — this project developed a system that generates renewable electricity from wastewater to power wavelength-specific LEDs for plants.

Frequently asked

Quick answers

What is the cost or price of the system?

Based on available project data, specific pricing or cost-per-unit is not provided, though the project aims for cost savings through reduced chemical fertilizer use.

Can this be scaled to an industrial level?

The project is designed in two phases, with Phase 2 specifically focusing on integration with Microbial Electrolysis Cells to allow for scalability and diverse applications.

What is the IP or licensing status?

Based on available project data, there is no specific mention of patents or licensing agreements, but the project is developing marketing strategies via an ACORN booster grant.

How does it integrate with existing infrastructure?

It is designed as a decentralized, low-power digital infrastructure using IoT and big data for nitrogen management, making it suitable for urban environments.

What is the timeline for deployment?

The project period runs from 2023-11-01 to 2027-10-31, suggesting it is currently in the development and testing phase.

Consortium

Who built it

The consortium consists of 7 partners across 6 countries, showing a strong academic lean with 4 universities and 1 research institute. However, there is a 29% industry ratio including 2 industrial partners and 1 SME, indicating a transition from lab research toward commercial application.

How to reach the team

Contact the Katholieke Universiteit Leuven research office regarding the Mi-Hy project.

Next steps

Talk to the team behind this work.

Contact SciTransfer to connect with the Mi-Hy consortium for licensing or pilot partnerships.

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