Transforming Wastewater into Clean Hydrogen Energy
Unlock the potential of ammonia recovery and electrolysis in your sustainability strategy.
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As the world races toward net-zero goals, a major challenge lies in how we treat wastewater—especially the ammonia it contains. Traditionally viewed as a pollutant, ammonia is now being seen as a valuable resource for clean hydrogen production.
One groundbreaking innovation leading this shift is OTAR® (Organics Thermal Ammonia Recovery), a process that recovers ammonia from wastewater and uses it to generate hydrogen through electrolysis—with far lower energy input than traditional water-splitting methods.
What is OTAR® and How Does It Work?
OTAR® captures ammonia using thermal energy (often waste heat from nearby operations), without any chemical additives. The recovered ammonia is then processed into ammonium hydroxide, which feeds into a low-voltage electrolyser to produce hydrogen and nitrogen.
This approach dramatically reduces electricity consumption compared to conventional hydrogen production, while avoiding the release of harmful gases like NOx.
Unlike conventional wastewater treatment methods that biologically remove ammonia—consuming large amounts of energy and risking nitrous oxide emissions—OTAR® offers a cleaner, closed-loop alternative. The system is modular, adaptable, and well-suited for both municipal and industrial facilities.
Field results show:
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>98% ammonia removal in a single pass
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Energy savings by eliminating aeration and chemical dosing
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Integration with existing anaerobic digesters and waste heat systems
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Revenue potential through hydrogen sales and carbon credits
Hydrogen generated from recovered ammonia can be used on-site, sold as fuel, or integrated into energy systems. The process turns a liability—ammonia pollution—into a valuable asset that aligns with climate goals and circular economy strategies.
OTAR® isn’t just a tech upgrade—it’s a paradigm shift. It enables:
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Lower emissions from wastewater operations
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Support for clean hydrogen infrastructure
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Opportunities for decentralised, containerised deployment
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Resilience to temperature or microbial fluctuations in treatment plants
Challenges to Adoption
Like many emerging technologies, OTAR® adoption may face hurdles such as:
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Capital investment for first-time deployment
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Integration with site-specific infrastructure
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Need for regulatory support and awareness
Yet with rising ammonia discharge limits and demand for green hydrogen, the case for adoption is growing
Conclusion
OTAR® transforms wastewater ammonia from an environmental burden into a clean energy opportunity. By unlocking the hydrogen potential in waste, it supports sustainability goals, reduces emissions, and opens new economic pathways for utilities, industries, and cities alike.
Estimate Your ROI with Ammonia-to-Hydrogen Ballpark Calculator
Curious about the financial benefits of recovering ammonia for clean hydrogen production?
Use our free ballpark calculator to get a quick estimate of your Return on Investment (ROI), payback period, and potential revenue from hydrogen and carbon credits.
Click here to get access to Ballpark Calculator!
Let’s Build Your Ammonia-to-Hydrogen Solution
Fill out a quick questionnaire and let our team walk you through a personalized plan.
We’ll help you shape a successful, scalable ammonia recovery and hydrogen production project.
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Let’s Build Your Pyrolysis Biochar Solution
Ready to explore a custom-made solution for your needs? Fill out a quick questionnaire and let our team guide you step-by-step — from specs to strategy — toward a successful pyrolysis biochar project.
Click here to get or a fast response with basic specs
Click here to get tailored recommendations and full proposal