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THIOPAQ® is a cost-effective and sustainable biogas purification system with which you can meet stringent gas quality requirements. The THIOPAQ® was invented and developed by Paques, in cooperation with universities. It has become the go-to technology for biological H2S removal, and is commonly applied in the wastewater treatment, biomethane and oil & gas industries.
What makes THIOPAQ® unique
EBI Énergie's plant in Canada needed to desulfurize gas containing 1,200 to 1,300 ppm of hydrogen sulfide (H₂S), a corrosive compound threatening piping and equipment. Their solution? Implementing the Paques THIOPAQ® system, utilizing a chemical scrubber with a mildly caustic liquid and a bioreactor housing naturally occurring bacteria. This innovative approach not only desulfurizes the gas, reducing H₂S levels to below 25 ppm, but also biologically regenerates 90% of the spent caustic, leading to significant cost savings.
Broad applicability of THIOPAQ®
Almost any gas-containing H2S can be purified by the THIOPAQ® gas purification system, including biogas, syngas, CO2-rich (off)-gasses, vent streams, and geothermal gas. The THIOPAQ® can be combined with any anaerobic wastewater treatment or digestion system. Applications for the biogas upgrading system extend across the pulp & paper, food & beverage, wastewater treatment, landfill, municipal, bioethanol, sludge/solids digestion, and biofuels industries.
Biogas flows vary from 50 Nm3/hour to more than 50,000 Nm3/hour, and daily sulfur loads range from 10 kg/day to 50,000 kg/day. Standardized systems such as this biogas purification system enable short project lead-times, while Paques’ experienced engineering team can tailor the unit to meet your specific needs.
The THIOPAQ® process explained
The THIOPAQ® (bio)gas filtration system combines fast chemical absorption to remove H2S from (bio)gas and a robust biological recovery of sulfur. It consists of an absorber column coupled to a biological reactor and sulfur recovery device.
In the absorber, H2S -containing gas is brought in contact with washing water via countercurrent exchange, where H2S readily dissolves into the slightly alkaline wash water.
In the bioreactor, naturally-occurring bacteria oxidize the sulfide to elemental sulfur particles, simultaneously regenerating the washing solution. This allows the alkaline washing solution to be continuously reused in the absorber column, leading to very low operational costs.
The sulfur produced in the system is separated in a solids separation step, and can be reused as a high-quality, organic fertilizer.
Why ANAMMOX® works
01
Break the Infinite Ammonia Recycle Loop.
02
Reduce Demands on main nitrogen removal process
03
Lower operating costs and make better use of capacity.
04
Compact and Efficient design for space optimization.
05
Proven performance in the market’s largest install base.
06
Know your numbers: build the ANAMMOX® business case for your plant.
PAQUES THIOPAQ® - Deep hydrogen sulfide removal
Discover the future of biogas with Paques' THIOPAQ®. Our innovative, cost-effective system removes harmful hydrogen sulfide, ensuring safety and efficiency. Developed through rigorous research and collaboration, THIOPAQ® transforms biogas into a reliable, sustainable energy source while producing high-quality fertilizer. Download our brochure to explore how THIOPAQ® can revolutionize your biogas treatment and contribute to a greener future.
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Q&A
What is ANAMMOX®?
ANAMMOX® is a side stream nitrogen-removal application that treats concentrated side streams from anaerobic digestion dewatering before they impact the main biological treatment process.
Why is the side stream important if it represents such a small amount of flow?
The side stream can represent less than 1% of total plant flow while contributing 30% or more of the nitrogen load returning to the main process. Treating this concentrated load before it returns can reduce the burden on the main treatment process.
Why is controlling the recycle nitrogen load important for discharge permits?
If the recycle load overwhelms the main biological treatment process, it can create process stability issues and concerns with discharge quality and permit compliance. Treating the recycle load makes the main process more stable and reduces this risk
What does ANAMMOX® change?
ANAMMOX® side stream treatment reduces the recycle load by approximately 90–95%, resulting in a 25–30% net reduction to the main process. It does so without consuming carbon and with approximately 50% less energy demand.
What are the main benefits for a municipal wastewater facility?
The primary benefits are lower operating costs, more available main-process capacity, lower energy demand, a smaller footprint and improved process stability, helping the plant consistently meet its discharge requirements. Cost and capacity as the primary value.
How does ANAMMOX® compare with conventional nitrogen removal?
Conventional nitrification and denitrification require carbon, aeration/energy and alkalinity. ANAMMOX® side stream treatment reduces the recycled load without consuming carbon and with approximately 50% less energy demand.
Is ANAMMOX® suitable for existing plants?
YES as it is a side-stream solution alongside an existing main treatment process. Its small footprint and reduced tank-volume requirement make it easier to retrofit into existing facilities.
How reliable is ANAMMOX®?
ANAMMOX® has been operating since 2002, demonstrating up to 90%+ nitrogen removal efficiency and operation under varying load conditions. Paques has 75+ installations globally and the largest installed capacity in the market for total nitrogen load removal: 385,000 lbs N/day.
How do I know whether ANAMMOX® makes economic sense for my plant?
It depends on the specific plant situation. Paques can evaluate the customer's case and compare the current approach—including chemical, energy and capacity considerations—with an ANAMMOX® solution to develop the specific payback/business case.
How can I get a customized ANAMMOX® assessment?
Talk to the Paques team. Paques experts can review the specific plant situation and build a tailored case to evaluate the potential benefits, costs and payback for that facility.
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Join the biotech revolution in wastewater and biogas
At Paques, we believe in a cleaner, more sustainable world where innovation in biotechnology plays a crucial role in managing our planet's resources wisely.
If you have any questions or wish to explore what Paques technologies can do for your operations, we encourage you to connect with our team of experts. Our knowledgeable professionals are ready to assist you, offering insights and guidance tailored to your specific needs.
Your inquiry is important to us, and we are eager to assist you in exploring our innovative solutions for biological wastewater and gas treatment.
A member of our expert team will be in touch shortly to discuss your specific needs and how Paques can help you achieve your environmental and operational goals.
We look forward to collaborating with you and hope to build a cleaner, more sustainable world together.
Warm regards,
The Paques Team
