Proposed Plant Operations Explained(posted Mar 22) (orginal article posted Feb 20) By HNTB Engineer Richard C. Claus, P. E. BCEE All combined sewer flow greater than the sustained peak flow capacity of the existing WWTP (8.9 million gallons a day) will be pumped by the proposed 80 MGD pump station into two 120-foot diameter primary clarifiers. The clarifiers will store up to 3.4 million gallons. For wet weather events up to a 1-year, 1-hour design storm all of this stored flow will be returned back to the WWTP for full treatment after storm flows reside. For larger storm events, the clarifiers will begin to overflow once filled and this partially treated overflow will receive ultra-violet light (UV) disinfection prior to sampling and discharge to Big Eagle Creek. All solids removed by settling in the clarifiers will be returned back to the WWTP for full treatment during or after the storm event. |
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