Quasar owns and operates the digestion and gas generation equipment and sells the power to the plant through a 20-year agreement. Just in front of the tall feedstock tank is the biofilter; to the right are the solids receiving station and the control building that houses the gravity belt thickener. Behind the feedstock tank are the three upgraded anaerobic digesters.
After spending millions of dollars for a system upgrade, the Wooster (Ohio) Water Pollution Control Plant was regularly violating its effluent permit. It had more solids — not less as planned. The digesters could not handle the extra load, and there wasn’t enough biogas to run...
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