Systems and methods of renewable natural gas processing

A gas recovery system, comprising:

• a source gas conditioning assembly fluidly coupled to an inlet source gas, and configured to condition and compress the inlet source gas to provide a conditioned source gas;
• a first membrane assembly fluidly coupled to the conditioned source gas, and configured to separate the conditioned source gas into a hydrocarbon enriched stream and a recovery stream;
• a second membrane assembly fluidly coupled to the hydrocarbon enriched stream, and configured to separate the hydrocarbon enriched stream into a hydrocarbon product stream and a recycle stream;
• a carbon dioxide (CO2) plant assembly fluidly coupled to the recovery stream, and configured to provide a carbon dioxide product stream and an enriched recycle stream;
• a standalone membrane assembly fluidly coupled to the enriched recycle stream, and configured to separate the enriched recycle stream into a hydrocarbon enriched recycle stream and a secondary recovery stream;
• an energy recovery assembly fluidly coupled to the hydrocarbon enriched recycle stream and configured to extract energy therefrom;
• wherein the source gas conditioning assembly is fluidly coupled to the recycle stream;
• and
• wherein the CO2 plant assembly is fluidly coupled to the secondary recovery stream.

An apparatus, comprising:

• a standalone membrane assembly configured to:
• receive a treated waste gas stream, the treated waste gas stream comprising a purge stream of a CO2 plant;
• separate the treated waste gas stream into a hydrocarbon enriched stream and a secondary recovery stream;
• provide the hydrocarbon enriched stream to one of an energy recovery assembly or a primary methane separation assembly;
• and
• provide the secondary recovery stream to the CO2 plant.

A gas recovery system, comprising:

• a source gas conditioning assembly fluidly coupled to an inlet source gas, and configured to condition and compress the inlet source gas to provide a conditioned source gas;
• a first membrane assembly fluidly coupled to the conditioned source gas, and configured to separate the conditioned source gas into a hydrocarbon enriched stream and a recycle stream;
• a second membrane assembly fluidly coupled to the hydrocarbon enriched stream, and configured to separate the hydrocarbon enriched stream into a hydrocarbon product stream and a recovery stream;
• a carbon dioxide (CO2) plant assembly fluidly coupled to the recovery stream, and configured to provide a carbon dioxide product stream and an enriched recycle stream;
• a standalone membrane assembly fluidly coupled to the enriched recycle stream, and configured to separate the enriched recycle stream into a hydrocarbon enriched recycle stream and a secondary recovery stream;
• an energy recovery assembly fluidly coupled to the hydrocarbon enriched recycle stream and configured to extract energy therefrom;
• wherein the source gas conditioning assembly is fluidly coupled to the recycle stream;
• and
• wherein the CO2 plant assembly is fluidly coupled to the secondary recovery stream.