Laserfiche WebLink
Treatment Plant Sizing Calculations: <br /> 24 hour Average Daily Flow (=ADF=Q) 9,000 gpd = 375 gph = 6.25 gpm <br /> BODS loading of 240 ppm = 0.009 x 8.34 x 240 = 18 pounds/day <br /> Equalization Tank Sizing <br /> Peak Hourly Flow to Equalization Tank is 3.5 Q= 32,500 gpd =21.87 gpm <br /> Peak Flow from Equalization to Aeration Tank is 1.5Q= 13,500 gpd = 9.38 gpm <br /> Equalization Tank is sized at 40% Q= 0.4 x 9,000 gallons = 3,600 gallons <br /> Actual EQ total volume = 4,350 gallons <br /> Anoxic Tank Sizing <br /> Sizing at 35% of ADF <br /> 9,000 gallons x 0.35 = 3,150 gallons <br /> Actual Anoxic total volume = 3,500 gallons <br /> Aeration Tank Sizing <br /> Loaded at 15# BOD per 1,000 cubic feet <br /> 18#x 15#/1,000CF = 1,200CF <br /> 1,200CF x 7.48 gal/cf= 8,977 gallons required in Aeration Zone <br /> Actual Aeration total volume = 13,125 gallons <br /> Clarifier Tank Sizing <br /> Surface Overflow Rate @ Design Peak Hourly Flow = 1,000 gal/sf/day <br /> 9,000 gpd / 1,000 gpd/sf= 9sf <br /> Actual Clarifier total area = 68sf <br /> Weir Loading 2 Design Peak Hourly Flow = 20,000 gal/If/day <br /> 9,000 gpd / 20,000 gpd/If = 0.45 linear feet of weir <br /> Actual Clarifier weir length = 8 If <br /> Sludge Holding Tank Sizing <br /> Based on 3 cubic feet per capita (capita = 100 gpd flow) <br /> 9,000 gpd / 100 gpd = 90 capita <br /> 3 cf/cap x 90 cap = 270 cf <br /> 270 cf x 7.48 gal/cf= 2,019 gallons <br /> Actual Holding Tank total volume = 2,975 gallons <br /> Page 9 of 11 <br />