Maximizing Benefits While Minimizing Risks of Adding Alternative Feedstock Sources

Understanding the basic requirements, benefits and drawbacks can help determine if feedstock addition — to enhance the production of renewable biogas — is a viable option for your facility.

By Adam Bogusch and Jeff Keller

Renewable natural gas (RNG) is a valuable commodity for many municipal and industrial wastewater facilities that utilize anaerobic digestion. The number of projects focused on the production of RNG continues to gain momentum due to the economic opportunities and supportive regulatory policies that create an environment for success.

Municipalities can expand upon existing digester and biogas recovery programs by incorporating the use of alternative feedstock sources — such as fats, oils and grease (FOG) — to their traditional biosolids to produce more biogas and generate larger revenue streams. But without the proper infrastructure, training and forethought, adding additional feedstock into a digester also can be a major point of failure, with costly consequences for an owner.

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