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SoCalGas introduces renewable gas into pipe system for first time

Southern California Gas Co. recently began injecting renewable natural gas produced by the waste management company CR&R Environmental into its pipeline system, marking the first time the utility has introduced California-produced renewable gas into its pipelines.

CR&R produced the gas at its anaerobic digestion facility in Perris, Calif., using organic waste collected from green waste bins in southern California cities. The company's anaerobic digester, which breaks down biodegradable materials to produce biogas, is believed to be the largest and most automated in the world, according to a July 2 news release.

The biogas was upgraded to pipeline quality before being injected into a new 1.4-mile pipeline section connecting the Perris facility to an existing SoCalGas line.

The Sempra Energy subsidiary invested $100 million into the project, which was funded with the help of state grants. SoCalGas is the largest gas distribution utility in the U.S., serving 21.7 million customers in central and southern California.