In the first of a two-part series published by EM Magazine, David Elam and Thomas Dunder from ABC member TRC examine the quality verification requirements of RNG made from biogas produced by anaerobic digestion of waste streams. This ensures the RNG is identical to fossil natural gas and can be injected into gas pipelines. They discuss the various sources of biogas, the upgrade of biogas to RNG, the various constituents of concern for these sources, and potential tariff and testing requirements prior to injection. More >>