System and method for control of feed compressors in an RNG recovery facility for biogas or landfill gas

A method for recovering methane from a biogas-generating source, comprising:

• accessing at least one gas stream comprising a biogas from a biogas-generating source;
• removing sulfur from the gas stream;
• compressing the gas stream;
• chilling the gas stream to less than 60 deg F.;
• compressing the gas stream and separating liquids from the gas stream at elevated pressure and reduced temperature, wherein the compressing is performed using a plurality of compressors operating in parallel with common control set points;
• separating a majority of trace contaminants from the gas stream through preferential adsorption of the trace contaminants;
• separating a majority of the carbon dioxide from the gas stream through preferential permeation of carbon dioxide through membranes;
• separating nitrogen and oxygen from the gas stream through preferential adsorption of methane;
• releasing adsorbed methane through depressurization;
• further releasing adsorbed methane through use of vacuum compressors;
• and
• recovering a methane product from the gas stream.