Engineering, 22.11.2019 06:31, muncyemily
3. the design criteria for oxidation ponds (also called facultative ponds, aerated facultative ponds) specified that (1) bod loading into the primary cell (or pond) shall not exceed 25 lbs bod/acre/day, (2) the minimum total water retention time, based on influent flow and all cells at water depth of 5 ft should not be less than 120 days., (3) the volume of winter storage between the water depths of 1.5 and 5 ft shall be sufficient so that no discharge is necessary for a four-month period, and (4) pond system should have at least two primary cells and one or more secondary cells. size the ponds for a community that generates 160,000 gpd wastewater with a bod of 220 mg/l. based on the climate of the area, the net water loss (evaporation plus seepage minus precipitation) during the storage months is 1.0 inch/month.
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3. the design criteria for oxidation ponds (also called facultative ponds, aerated facultative ponds...
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