The Sewerage Agency of Southern Marin has rehabilitated a 40-year-old, 50-foot diameter “digester” tank.
The tank is designed to reduce the volume of sewage sludge and make it suitable for subsequent use. After the repairs were completed, the tank was gradually refilled and is undergoing a natural process of re-establishing its biological environment to facilitate further breakdown of the organic matter.
It is heated to approximately 98 degrees Fahrenheit and is designed to maintain this temperature (works similarly to our own bellies). The progression of this biological process consists of several stages that may produce various gasses that cause unpleasant odors. We expect that this should change soon.
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