OTAR® - Organics Thermal Ammonia Recovery
Meet National Nitrogen and Carbon Regulations Head-On
Reach effluent levels as low as 10 mg/l with our OTAR® system.
New and stricter EPA nutrient discharge regulations and state-level emission standards are reshaping how municipal and industrial wastewater treatment facilities operate across the United States.
Utilities and industries that delay adapting face higher compliance costs, penalties, and carbon liabilities.
OTAR® is a proven, cost-effective wastewater treatment solution that reduces carbon emissions and helps facilities stay compliant while unlocking new operational efficiencies.
The Compliance Challenge
The Pressure Is On for U.S. Wastewater Operators
EPA enforcement of nutrient discharge limits is expanding in regions such as the Chesapeake Bay watershed, Florida, California, and the Midwest.
Biological nutrient removal (BNR) methods consume large amounts of energy and emit N₂O, a greenhouse gas nearly 300× more potent than CO₂.
Rising carbon prices and reporting requirements increase the financial burden of outdated nitrogen removal methods.
Landfill Management
Treat complex leachate and meet strict discharge consent limits without biological failure.
Industrial Process Water
Stable ammonia removal for chemical, manufacturing, and food waste streams.
Municipal Waste
Manage high-strength side-streams from THP and anaerobic digestion centrates.
OTAR® at a Glance : A Proven Low-Carbon Solution
At Organics, we guide industries through the entire journey — from waste management to renewable energy use.
Our integrated approach ensures that every stage adds value, reduces emissions, and creates new revenue streams.
Thermal ammonia recovery with up to 98.5% removal efficiency.
Uses waste heat, avoiding costly caustic/acid chemicals.
Cuts carbon footprint by avoiding N₂O emissions and reducing indirect emissions from synthetic fertiliser production.
25+ years of operational experience with 17 plants worldwide.
Reduces nitrogen removal costs by up to 60–80% compared with traditional biological methods.
- Non-Biological Process: Unlike traditional wastewater treatment, OTAR® does not rely on sensitive bacteria cultures
Easy retrofit for anaerobic digester wastewater treatment and landfill leachate treatment facilities.
Choosing the Right Wastewater Treatment Technology
Compared with traditional nitrogen removal technologies, OTAR® combines cost-effectiveness, energy efficiency, and measurable carbon savings, helping facilities stay competitive and compliant under evolving U.S. regulations.
Comparison Table between OTAR® and other technology
| Technology | Typical Cost (GBP/kg-N) | Chemical Use | Carbon & Compliance Impact | Notes / Suitability |
|---|---|---|---|---|
| OTAR® (Thermal Ammonia Recovery) | ≈ 0.45 | Uses waste heat, no caustic/acid | Avoids N₂O emissions, reduces carbon footprint, supports EPA compliance | Proven, modular, ideal for high-N sidestreams & landfill leachate |
| pH-Adjusted Thermal Stripping | ≈ 1.30 | Requires caustic & acid | Moderate GHG reduction, higher operating costs | Chemical handling and disposal required |
| Biological Nitrification-Denitrification (BNR) | ≈ 2.95 | Needs aeration & carbon source | Generates N₂O (≈300× CO₂ warming), high energy demand | Common but increasingly challenged by carbon rules |
| Anammox Biological Process | ≈ 2.25 | Sensitive biological process | Lower energy than BNR but still emits some N₂O | Limited by stability and site conditions |
Download the full version to explore technical details, performance data, and case studies.
Why Act Now
Regulatory, Financial, and Climate Pressures Are Rising
Tighter discharge permits and EPA compliance reporting are already impacting U.S. utilities and industries.
Growing demand for low-carbon wastewater treatment aligns with corporate ESG and climate targets.
Facilities that move early can capture carbon offsets, avoid penalties, and reduce long-term treatment costs.
Calculator: Plan with Confidence
Understand the business case for your wastewater treatment plant.
Our online calculator helps you model:
Typical cost savings from replacing conventional methods with OTAR®
Reduction in chemical usage compared to standard treatment
Carbon-emission savings and compliance with environmental regulations
ROI, payback period, and sustainability impact for your operations
Understand how OTAR® supports your business in meeting carbon emission goals and regulatory requirements.
Download the Industry Briefing
Discover how OTAR® helps you stay compliant, cut emissions, and reduce wastewater costs — register below to get the Industry Briefing PDF for insights on boosting compliance, carbon performance, and efficiency.
Product briefing : On-site Thermal Ammonia Recovery (OTAR)
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