Biogas Upgrading by Method of Hydrocarbon Gas Dilution

A method for upgrading biogas comprising:

• providing a pretreated biogas stream;
• providing a natural gas stream;
• controlling a pressure and a flow of said pretreated biogas stream;
• controlling a pressure and a flow of said natural gas stream;
• compressing said pretreated biogas stream;
• blending together said compressed pretreated biogas stream and said natural gas stream to create a blended gas product;
• analyzing said blended gas product to determine if a plurality of tariff parameters are substantially met;
• and
• adjusting automatically an actual ratio of said compressed pretreated biogas stream to said natural gas stream in response to said analyzing of said blended gas product, such that said blended gas product meets said plurality of tariff parameters, such that a renewable natural gas product is created.

A method for upgrading biogas comprising:

• providing a pretreated biogas stream;
• providing a natural gas stream;
• controlling a pressure and a flow of said pretreated biogas stream;
• controlling a pressure and a flow of said natural gas stream;
• compressing said pretreated biogas stream;
• blending together said compressed pretreated biogas stream and said natural gas stream to create a blended gas product;
• compressing said blended gas product;
• analyzing said blended gas product to determine if a plurality of tariff parameters are substantially met;
• and
• adjusting automatically an actual ratio of said compressed pretreated biogas stream to said natural gas stream in response to said analyzing of said blended gas product, such that said blended gas product meets said plurality of tariff parameters, such that a renewable natural gas product is created;
• wherein said pretreated biogas is obtained from at least one of a landfill, an industrial waste site, and an agricultural waste site.