ABC Formula/Conversion Table for Wastewater Treatment ...

1 ABC Formula/Conversion Table for Wastewater Treatment , Industrial, Collection and Laboratory Exams (Titrant Volume, mL) (Acid Normality) (50,000). Alkalinity, as mg CaCO3/L =. Sample Volume, mL. Volts Amps =. Ohms Area of Circle = ( ) (Diameter2) or ( ) (Radius2). Area of Cone (lateral area) = ( ) (Radius) Radius 2 + Height 2. Area of Cone (total surface area) = ( ) (Radius) (Radius + Radius 2 + Height 2 ). Area of Cylinder (total outside surface area) = [Surface Area of End #1] + [Surface Area of End #2] +. [( ) (Diameter) (Height or Depth)].

2 Area of Rectangle = (Length) (Width). (Base) (Height). Area of a Right Triangle =. 2. Sum of All Terms Average (arithmetic mean) =. Number of Terms 1/n Average (geometric mean) = [(X1) (X2) (X3) (X4) (Xn)] The nth root of the product of n numbers Biochemical Oxygen Demand (unseeded), in mg/L = (Initial DO, mg/L) (Final DO, mg/L). Sample Volume, mL. Final Diluted Volume, mL. (Desired Flow) (100%). Chemical Feed Pump Setting, % Stroke =. Maximum Flow (Flow, MGD) (Dose, mg/L) ( L/gal) (1,000,000 gal/MG). Chemical Feed Pump Setting, mL/min =.

3 (Liquid, mg/mL) (24 hr/day) (60 min/hr). Circumference of Circle = ( ) (Diameter). (Instantaneous Flow) (Total Sample Volume). Composite Sample Single Portion =. (Number of Portions) (Average Flow). Storage Volume, gal Cycle Time, min. =. Pump Capacity, gpm - Wet Well Inflow, gpm Degrees Celsius = (Degrees Fahrenheit - 32) (5/9) or ( F 32). o Degrees Fahrenheit = [(Degrees Celsius) (9/5) + 32] or [(Degrees Celsius) ( ) + 32]. Volume Detention Time = Note: Units must be compatible. Flow Effective February 10, 2009.

4 Electromotive Force ( ), volts = (Current, amps) (Resistance, ohms) or E =IR. (Dosage, mg/L) (Capacity,MGD) ( lbs/gal). Feed Rate, lbs/day =. (Purity, decimal percentage). Flow, gpm Filter Backwash Rate, gpm/sq ft =. Filter Area, sq ft Filter Backwash Rise Rate, in/minute =(Backwash Rate, GPM/sq ft) (12 in/ft). ( gal/cu ft). (Solids Loading, lbs/day) (Recovery, % / 100%). Filter Yield, lbs/hr/sq ft =. (Filter Operation, hr/day) (Area, sq ft). Flow Rate, cfs = (Area, sq ft) (Velocity, ft/sec) or Q = AV where: Q = flow rate, A = area, V= velocity BOD 5 , lbs/day Food/Microorganism Ratio =.

5 MLVSS, lbs Force, pounds = (Pressure, psi) (Area, sq in). Volume of Wastewater Produced, gpd Gallons/Capita/Day =. Population (Titrant Volume, mL) (1,000). Hardness, as mg CaCO3/L = Only when the titration factor is of EDTA. Sample Volume, mL. (Flow, gpm) (Head, ft). Horsepower, Brake (bhp) =. (3,960) (Decimal Pump Efficiency). (Flow, gpm) (Head, ft). Horsepower, Motor (mhp) =. (3,960) (Decimal Pump Efficiency) (Decimal Motor Efficiency). (Flow, gpm) (Head, ft). Horsepower, Water (whp) =. 3,960. Total Flow Applied, gpd Hydraulic Loading Rate, gpd/sq ft =.

6 Area, sq ft Volume, gallons Leakage, gpd =. Time, days Mass, lbs = (Volume, MG) (Concentration, mg/L) ( lbs/gal). Mass Flux, lbs/day = (Flow, MGD) (Concentration, mg/L) ( lbs/gal). Mean Cell Residence Time (MCRT) Aeration Tank TSS, lbs + Clarifier TSS, lbs =. or Solids Retention Time (SRT), days TSS Wasted, lbs/day + Effluent TSS, lb/day Moles of Solute Molarity =. Liters of Solution Effective February 10, 2009. Number of Equivalent Weights of Solute Normality =. Liters of Solution Total Weight Number of Equivalent Weights =.

7 Equivalent Weight Total Weight Number of Moles =. Molecular Weight Organic Load, lbs BOD 5 /day Organic Loading Rate =. Volume Organic Load, lbs BOD 5 /day Organic Loading Rate-RBC, lbs BOD5/day/1,000 sq ft =. Surface Area of Media, 1,000 sq ft Organic Load, lbs BOD 5 /day Organic Loading Rate-Trickling Filter, lbs BOD5/day/1,000 cu ft =. Volume, 1,000 cu ft Oxygen Usage, mg/L. Oxygen Uptake Rate/Oxygen Consumption Rate, mg/L/minute =. Time, minute (Flow, MGD) (BOD, mg/L) ( lbs/gal). Population Equivalent, Organic =.

8 Lbs BOD/day/person Recirculated Flow Recirculation Ratio-Trickling Filter =. Primary Effluent Flow (Original Flow - Reduced Flow) (100%). Reduction in Flow, % =. Original Flow (In - Out)(100%). Reduction of Volatile Solids, % = All information (In and Out) must be in decimal form In (In Out ). (In Out) (100). Removal, % =. In (Return Flow Rate) (100%). Return Rate, % =. Influent Flow Rate (MLSS) (Flow Rate). Return Sludge Rate-Solids Balance =. Return Activated Sludge Suspended Solids MLSS. Drop or Rise Slope, % = x 100.

9 Distance 100. Sludge Density Index =. SVI. Effective February 10, 2009. (SSV30 , mL/L) (1,000 mg/g). Sludge Volume Index, mL/g =. MLSS, mg/L. (Dry Solids, grams) (1,000,000). Solids, mg/L =. Sample Volume, mL. Weight, mg Solids Concentration, mg/L =. Volume, L. Solids Applied, lbs/day Solids Loading Rate, lbs/day/sq ft =. Surface Area, sq ft Solids Retention Time (SRT): see Mean Cell Residence Time (MCRT). Specific Weight of Substance, lbs/gal Specific Gravity =. Specific Weight of Water, lbs/gal OUR, mg/L/min (60 min).

10 Specific Oxygen Uptake Rate/Respiration Rate, (mg/g)/hr =. MLVSS, g/L (1 hr). Flow, gpd Surface Loading Rate or Surface Overflow Rate, gpd/sq ft =. Area, sq ft Three Normal Equation = (N1 x V1) + (N2 x V2) = (N3 x V3), where V1 + V2 = V3. Two Normal Equation = N1 x V1 = N2 x V2, where N = concentration (normality), V = volume or flow Flow Rate, cu ft / sec Distance, ft Velocity, ft/second = or Area, sq ft Time, second (Dry Solids, g Fixed Solids, g) (100). Volatile Solids, % =. Dry Solids, g Volume of Cone = (1/3) ( ) (Diameter2) (Height).