Turning wastewater nitrogen from a costly pollutant into a valuable resource.
SwieNitro Recovery builds modular ammonia recovery systems that convert nitrogen from high-strength waste streams into reusable fertilizer, cutting treatment burden while creating a new revenue stream.
The Problem
The Nitrogen Paradox:
$50B worth of nitrogen enters waste streams every year.
High-strength side streams
Tightening discharge limits
Problem #1: Ammonia fertilizer is expensive and its production is energy- and carbon-intensive.
Haber-Bosch process consumes ~12.5 kWh/kg-N and accounts for 1-2% of global energy use and ~1.2% of CO2 emissions.
Problem #2: Ammonia cause environmental challenge and expensive to treat.
U.S. Bay Area WWTPs directed to reduce nitrogen discharges by 40-60% for the 10-year plan (2024-2034), and the plant upgrades could reach as high as $11 billion.
The Solution
We solves two problems simultaneously.
Technology
SWIE: A simple, low-cost, and robust modular for ammonia recovery
The SwieNitro loop:Wastewater nitrogen ➡️ SwieNitro recovery ➡️ Fertilizer
Modular ammonia recovery, built to retrofit.
SwieNitro systems are skid-mounted and site-configurable. They integrate with existing wastewater and anaerobic digestion infrastructure — no plant redesign required.
How It Works
01 Capture
Ammonia-rich streams, digester centrate, food-processing effluent, industrial side streams, feed directly into a compact SwieNitro skid.
02 Selectively recover
Our selective separation stage pulls ammonia out of the water without the energy penalty of biological nitrogen destruction.
03 Convert & reuse
Captured nitrogen is concentrated into a fertilizer product such as ammonium sulfate, while treated water returns to the plant with a lighter nitrogen load.
We collected ammonia fertilizer product from human urine.
Advantages
Built for the economics of real facilities.
Recovered nitrogen products
Captured ammonia is converted into fertilizer products such as ammonium sulfate, supporting a circular approach to nitrogen management.
Applications
Who needs ammonia recovery.
Wherever nitrogen concentrations are high and treatment is expensive, recovery becomes the better economic answer.
What we offer
Modular ammonia recovery systems
Pilot-scale demonstration & field validation
Site-specific system integration
Recovered fertilizer product pathways
About Us
A circular nitrogen economy, engineered.
SwieNitro Recovery is turning wastewater nitrogen from a costly pollutant into a valuable resource. We are developing a modular ammonia recovery technology that removes nitrogen from ammonia-rich waste streams and recovers it as reusable fertilizer.Our technology is designed for municipal wastewater treatment plants, anaerobic digestion and renewable natural gas facilities, food processors, and other industries facing costly ammonia management challenges. By combining wastewater treatment with nutrient recovery, SwieNitro reduces treatment burden, creates value from waste, and enables a more circular nitrogen economy.We are currently advancing our technology through pilot-scale development and field validation as we work toward commercial deployment.
Pilot-scale:
Technology advancing through field validation
Updates
Progress toward commercial deployment.
Pilot progress
Pilot-scale skid design underwayEngineering a field-deployable modular unit for on-site evaluation with partner facilities.
Partnerships
Seeking host sites for field trials
Contact
Let's talk pilots and partnerships.
Whether you operate an ammonia-heavy facility, invest in climate infrastructure, or fund early-stage water technology, we'd like to hear from you.
Modular ammonia recovery technology turning wastewater nitrogen into clean water and reusable fertilizer.
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