When the City of Lakeland, Florida, needed to expand the solids processing capacity at their Glendale WWTP, they opted to modify the existing anaerobic digestion system to produce Class A biosolids. The selected alternative was a proprietary two-phase anaerobic digestion process. A
key feature of the process is the batch solids feed to and withdrawal from the first stage, thermophilic digester. This required modification and coordination of the solids transport and gas handling systems to accommodate the batch operation as well as other accommodations not required in
the existing two-stage anaerobic digestion system.
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