Biogas

Biogas Polishing

Unlock the Full Potential of Biogas Energy

Biogas, a methane-rich energy source, is produced from the methanization of organic materials such as agricultural residues, wastewater sludge, and landfill waste. When these gases are purified by removing contaminants, they become clean, reliable methane effective for heat, electrification, and CNG. As utilities and other natural gas suppliers seek sustainable energy solutions, biogas plays a critical role in reducing emissions and transforming waste streams into dependable sources of power.

Advanced Purification for Maximum Performance

Our industry-leading portfolio of advanced chemisorbant media is engineered to deliver exceptional contaminant removal performance. The media can effectively eliminate H2S and other sulfurs, siloxanes, VOCs, and trace impurities – unlocking the full value of biogas.

Proven Solutions Across Diverse Applications

Designed to perform across diverse applications such as agricultural digesters, landfills, wastewater treatment facilities, pulp and paper mills, and food waste operations. Whether you are optimizing an existing system, or designing a new renewable energy project, our solutions are designed to enhance system reliability, increase safety, and maximize renewable energy output.

Drive Renewable Energy Forward

By combining advanced contaminant removal with application-specific expertise, we help operators maximize output, meet regulatory requirements, and achieve long-term sustainability goals. Partner with PureAir to turn biogas into a cleaner, more efficient, and more profitable energy resource.

Alumina

Is an inert, porous substance that is hygroscopic and used in many adsorption applications from gas phase filtration to being used as a desiccant in air drying applications.

AC-X

Because of its shape, performance, and low cost, extruded carbon has become the standard over the past decade. PureAir carbon has a low dust, high activity level, economical choice.

Siloxsorb

Is an inert, porous substance that is used in many adsorption applications.

Sulphasorb Fe™

Adsorbs 25% of its weight in Hydrogen Sulfide (H₂S), this media is far more effective than its activated carbon competitors. Made from high iron content compound, Sulphasorb™ Fe media is an all-around better choice than activated carbon for use in odor control scrubbers where H₂S levels exceed 50 ppm.

Sulphasorb XL™

This media has the highest Hydrogen Sulfide (H₂S) removal capacity commercially available. H₂S is the primary gas in sewage odors and industrial process gases. This high removal capacity (greater than 0.30 g/cc or more than 50 percent by weight) gives PureAir® gas removal systems the ability to provide long lasting, highly efficient odor removal. This media provides customers with a low cost solution with the highest effectiveness.

Sulphasorb FeXL™

This media is a 50/50 percent blend of Sulphasorb XL™ media and Sulphasorb Fe™ media. The ability to remove 45% of its weight in H₂S places it high above activated carbon. Made from a high iron content compound, Sulphasorb FeXL™ media is an all-around better choice than activated carbon for use in odor control scrubbers where H₂S levels exceed 50 ppm.

Safetysorb

Specifically designed to meet the requirements of a chlorine release emergency. This media remains available for absorption until the event of an emergency release.

NOXsorb

Was developed to serve the growing worldwide concern about the health risks associated with NO_x. This family of gases includes Nitrogen Oxide (NO), Nitrogen Dioxide (NO₂), and Nitrogen Trioxide (NO₃).

Testing and Replacing Chemisorbant Media

Keeping units serviced with high-performance chemisorbant media is a very important part of system maintenance. If the media is not changed out when it is due for replacement, the unit will not function properly and unwanted gases will be released into the environment. The life span of media will vary depending on many factors, such as type and quantity of gas, airflow, etc., but generally lasts from 1 to 3 years depending on media quantity and chemical load. There are multiple ways to test and see if the media is reaching its expiration date:

LIFEGARD™ Media Bed Monitor – The LIFEGARD™ offers enhanced continuous, real-time monitoring with an advanced electronic notification system that simplifies maintenance scheduling and enhances operational efficiency. Equipped with externally wired and mounted sensors, the monitor detects variations in chemisorbant media, enabling precise forecasting of media consumption.
Download LIFEGARD™ Brochure
_{Copyright ©2025 by PureAir® Filtration; All Rights Reserved. LIFEGARD™ is a trademark owned by PureAir® Filtration. The LIFEGARD™ media bed monitor is protected by US Patent 12,312,548 issued to PureAir® Filtration May 27, 2025 by US Patent Office}

Biogas Purification Case Study

FACILITY TYPE: Dairy Biogas Plant

LOCATION: Central California

MEDIA USED: Sulphasorb Fe™ chemisorbant media

PROBLEM: The plant needed an odor control solution to combat the unpleasant odors and greenhouse gases created during the biogas process.

SOLUTION: Our media alone provided twice the odor removal capacity and allowed the facility to reduce its equipment size by half. Originally, the facility was producing H2S levels of 7,000 ppm. After our media was installed, H2S levels dropped to below 1 ppm.

Download Dairy Biogas Plant Case Study