Once the facility is already built and we assume everything is mechanically going well, your goal is to keep the microbes happy. Unhappy microbes = reduced biogas production.

Common operational factors that stress out the microbes:

-Overfeeding

-Temperature swings (more common in the winter when feedstocks are fed frozen into…

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The concentration of H2S in the biogas will depend on the 1) feedstocks 2) pH 3) temperature. Generally, higher protein feedstocks produce more H2S. Decreasing pH and temperature pushes more H2S in the gas phase (instead of staying in the digestate). There’s a wide range of pH and temperatures that you can operate at to minimize the H2S in…

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Moving from running stable to running optimally is like the experience of going from an average fit person into an athlete. Digesters are biological systems. We (and digester microbes) train to become athletes by eating a diet that sustains the effort of pushing ourselves out of our comfort zone.

For digesters, pushing to optimal…

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