Abstract: A method for production of renewable natural gas (RNG) from biogases containing volatile organic compounds (VOCs) combines temperature swing adsorption (TSA) for removal of VOCs, a form of pressure swing adsorption (PSA) for nitrogen separation, and membrane gas separation technology for carbon dioxide removal. TSA systems may improve removal of VOCs relative to PSA systems, may reduce RNG plant operating costs, and may simplify RNG plant operation. Methane recovery may be improved by using equilibrium PSA systems instead of dynamic PSA systems for methane separation.

Abstract: An automated wellhead monitoring and control system. The system is communicatively coupled to one or more LFG wellheads as well as other desired landfill components. The system receives and aggregates both real-time and historical data related to the operation of landfill components at a single site and/or integrates numerous sites for comparison. The system controls the LFG wellheads and other desired landfill components based on the real-time, forecasted, and historical data, and utilizes various algorithms, including machine learning and artificial intelligence, to effectuate such control.

Abstract: Biogas is converted to a vehicle fuel equivalent to compressed natural gas high in methane in a simple, low cost process involving steps of refrigeration, non-regenerative activated carbon purification and carbon dioxide removal using low-pressure membrane technology.

Abstract: A method for producing high purity biomethane using two non-regenerative media in series to reliably and virtually completely eliminate undesirable impurities from biomethane. The first media in the series is activated carbon, preferably virgin media, produced from coconut shells or coal. The second media in the series is silica gel or other desiccant. Neither material is regenerated; rather, the purity of the biomethane is monitored and when the media is spent, the media is discarded.