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 Biogas is a renewable gaseous fuel containing approximately 50-70% methane and 30% to 40% carbon dioxide. Biogas is produced as a by-product from the decomposition of organic waste in landfills and anaerobic digesters that process agriculture waste and municipal waste water. Anaerobic digestion of animal manure and other agricultural wastes offers a number of additional benefits to farmers, including:
- reduce air and water pollution
- odor management
- production of environmentally benign co-products including organic fertilizer and animal bedding material
- new revenue streams such as sales of renewable natural gas and more environmentally friendly fertilizers
To date, electricity generation has been the most common option for energy recovery from biogas, accounting for over 60% of the operational landfill gas processing plants in the United States. However, the recovery of pipeline grade methane or compressed natural gas ("CNG") from landfill gas is also viable using gas purification technology.
QuestAir’s methane purifiers are used around the world to upgrade biogas to renewable natural gas. For instance, the QuestAir gas purification system at Cincinnati’s Rumpke Landfill, one of the largest landfills in the U.S., upgrades biogas from the landfill into pipeline-quality renewable natural gas. The purified gas is piped to more than 8,700 homes for use by Duke Energy customers.
In recent years, QuestAir has made strong inroads in the biogas purification sector, which is being driven by:
- government incentives for replacing imported gas with local, renewable energy
- public demand for renewable, cleaner energy and reduced greenhouse gas emissions
- concerns about waste management in the agriculture and food industry
- concerns about energy security
 QuestAir Technology
A key step in the processing of biogas is the separation of carbon dioxide present in the gas. The QuestAir™ M-3100 and M-3200 PSA systems offer compact, low-cost, carbon dioxide separation solutions for lower capacity applications (up to 4,000 NCMH product methane). The compact design and optimized performance of QuestAir’s PSA is an excellent fit with biogas upgrading plants.
QuestAir™ M-3100
QuestAir™ M-3200 |
