OTAR® for Anaerobic Digestion (AD)
Is High Ammonia Killing Your Digester Performance?
Don’t let nitrogen limit your renewable energy potential. Lower Total Ammoniacal Nitrogen (TAN) levels, stabilize your biology, and maximize methane production with our non-biological OTAR® system.
Engineered for Proven Reliability:
25+ Years of Engineering Excellence | 17 Operational Plants Worldwide | 98.5% Proven Removal Efficiency
OTAR® for Anaerobic Digestion (AD)
Is High Ammonia Killing Your Digester Performance?
Don’t let nitrogen limit your renewable energy potential. Lower Total Ammoniacal Nitrogen (TAN) levels, stabilize your biology, and maximize methane production with our non-biological OTAR® system.
Engineered for Proven Reliability:
25+ Years of Engineering Excellence | 17 Operational Plants Worldwide | 98.5% Proven Removal Efficiency
Is High Ammonia Killing Your Digester Performance?
Centralised anaerobic digesters processing food scraps, manufacturing organics, and source-separated commercial streams face massive chemical hurdles. Because high-protein food waste releases extreme concentrations of Total Ammoniacal Nitrogen (TAN) as it breaks down, causing:
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Inhibited Biomethane Yields: High TAN paralyzes bacteria, suppressing gas output and draining energy revenue.
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Process Volatility: Ammonia spikes lead to “sour” digesters, slow biomass recovery, and costly downtime.
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Capacity Bottlenecks: Reduced efficiency limits your feedstock throughput, driving up trade waste liabilities.
OTAR® : A Proven Circular Economy Solution
Maximize Biomethane Output via Energy-Neutral Thermal Stripping
The OTAR® platform is a modular, thermal stripping system engineered to integrate directly into your existing AD infrastructure. By processing the digestate stream, it uncouples your organic loading rates from ammonia toxicity limits.
Boost Biogas Efficiency
Lowering ammonia levels allows for higher organic loading rates.
Energy Neutral Operation
OTAR® is thermally driven, utilizes waste heat from your existing biogas engines (CHPs).
Resource Recovery
The system also produce commercial-grade Ammonium Sulphate (up to 40%) or concentrated Ammonium Hydroxide (up to 25%) for Australian agricultural distributors.
OTAR® at a Glance : Optimized for Thermal Resource Recovery
We deploy optimized configurations based on your site’s profile:
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Variant 3 (Ammonium Sulphate System): Binds stripped ammonia gas with a sulfuric acid stream to produce 40% concentration Ammonium Sulphate—preferred fertilizer by Australian agricultural networks.
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Variant 4 (Advanced Heat Recycling): Utilizes vacuum-assisted heat exchangers. This setup minimizes total heat consumption, making it ideal for facilities with tight site thermal profiles.
FAQ
How does the OTAR® system prevent biological crashes in Australian food waste AD infrastructure?
Food waste and commercial source-separated organics contain volatile proteins that rapidly convert into free ammonia ($NH_3$) during anaerobic digestion. Once total ammoniacal nitrogen (TAN) exceeds toxicity thresholds, methanogenic bacteria are paralyzed, suppressing biogas generation.
By passing digestate through a non-biological OTAR ammonia stripping process, the ammonia is mechanically isolated and removed upstream. This keeps your main digester operating at peak biological efficiency, allowing you to safely scale up food waste loading volumes.
Can on-site ammonia recovery improve project eligibility for Australian bioenergy grants?
Yes. Expanding resource recovery directly impacts carbon abatement scoring. Initiatives like the NSW Renewable Gas Production Program provide direct funding for commercial biomethane facilities injecting into the gas grid, while the national Guarantee of Origin (GO) scheme establishes emissions accounting frameworks for certified renewable gases.
Integrating an energy-neutral, chemical-free OTAR® unit proves a closed-loop design, maximizing eligibility for state and federal financing while enabling you to capture premium green fuel values.
Calculator: Discover Your System Outputs with OTAR
Enter your flow rate and nitrogen levels to project your custom project metrics:
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Resource Recovery: Daily ammonia capture (kg/day), Hydrogen production (tons/year), and target outlet (mg/L).
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Energy Profile: Required thermal (kWth) and electrical (kWe) loads.
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Financials: Projected annual OPEX, simple payback period, and estimated Project IRR (%).
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Technology Comparison: Performance mapped directly against biological BNR, ion exchange, or steam stripping.
Download the Product Briefing
Turn Your Ammonia Liability into a Resource
Join the bioenergy operators utilizing on-site thermal recovery to insulate their facilities against biological failure, capture new fertilizer revenue streams, and future-proof their environmental compliance.
Product briefing : On-site Thermal Ammonia Recovery (OTAR)
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