Landfill Gas
Landfill Gas (LFG)
We provide consultancy services and comprehensive engineering services for handling methane-rich gasses from landfills to AD plants.
The HGA team has more than 90 years of experience in the development of landfill gas into merchantable products.
Once considered a liability, LFG is now being transformed into an asset benefitting landfill owners, communities, industry, and the environment. With a composition of approximately 50 percent methane, LFG is a renewable alternative to traditional natural gas. With over 30 years of experience in the pipeline and chemical industries, HGA offers municipalities, project developers, and industrial companies the EPC services they need to efficiently collect, clean, and transport refined LFG through pipelines or as highly marketable compressed natural gas (CNG) and liquefied natural gas (LNG).
New Facilities or Updating/Converting
Whether you plan to build a greenfield processing plant or are looking to optimize your existing facility, HGA can advise clients with services from consultation and design to construction, commissioning, and startup. With over 20 years of experience in engineering and project management, our team has successfully executed projects from $100,000 to over $150,000. Having designed and built some of the earliest LFG processing plants in the country, our team offers more than 90 years of combined experience in renewable fuels processing.
HGA Gas Treating Process
HGA has developed a novel process designed to handle high atmospheric intrusion, without the use of a nitrogen rejection unit (NRU) or the need for high inlet gas compression. This unique approach is the preferred process for landfills with high levels of N2 due to atmospheric intrusion. The removal of the NRU, the DEOx unit, and high-pressure compressors lowers both installation and maintenance costs, while maintaining high-volume capacity and ultimately producing a higher concentration of methane.
H2S & Siloxane Removal
HGA’s approach to H2S and siloxane removal utilizes a regeneratable liquid scavenger system that discharges elemental sulfur and therefore produces no air emissions. With the use of a liquid scavenger, our process eliminates the need for periodic solid media replacement, potential downtime, and hazardous waste disposal that is required by dry H2S removal systems and thermal oxidizer permitting. For siloxane removal, HGA incorporates a deep chilling technology that combines the necessary dehydration for LFG treatment and then releases the removed siloxanes and VOCs as an aqueous discharge, eliminating the air emissions of other removal technologies.
Have You Considered LNG?
The ability to further process LFG into LNG offers LFG and biogas producers that were previously unable to maximize the value of their asset a viable means to access the RNG market’s full potential. Not only is LNG a higher quality, but the higher-valued product—98 percent pure methane—is also easily transportable by truck and rail, providing new access to a multitude of potential customers and applications. This approach is particularly applicable to projects where natural gas pipelines are either logistically inconvenient or in areas difficult to permit interconnections.
Traditional vs. Virtual Pipeline
HGA has been involved in the design and construction of pipelines and power lines for over 20 years, having evaluated and designed approximately 5,000 miles of route. If your facility has a pipeline nearby and building a short (feeder) pipeline to tie into a larger one is the most feasible option for you, we can help determine the right layout, assist in getting ROW permits, as well as design and construction.