SPREADSHEET PROGRAM FOR CALCULATING THE pH - COAGULANT DOSAGE RELATIONSHIP oject : EXAMPLE Date : 08/24/22 Coagulant: Alum 1. INPUT: INSERT INPUT IN DOUBLE-LINED CELLS Raw Water Characteristics Specific Alkalinity Initial Conductance Temp. (mg/L as pH (µmho/cm) (°C ) CaCO3) 8.2 100 20 100 Commercial Coagulant Solution Characteristics BasicitySulfuric Acid Metal Coagulant Use the following c (%) (%) Content Soln. Specific to determine the re (%) Gravity commercial strength 0 0 4.3 1.33 mg metal Type of Coagulant (For Fe put 0 in cell, fo 1 0.111 (meq/m Flowrate of Water to be Treated Flowrate (gallons per minute) 694 1 MGD = 694 gpm Target pH 8.20 <---------INITIAL pH 8.10 (1) Enter interval between pH values, e.g., 0.1 units 8.00 (2) 0.1 7.90 (3) 7.80 (4) 7.70 (5) Calculated Effective Acid Content (EAC) of the Coagulant S 8.5 Closed System pH (no exchange
pH-dosage-calculationSPREADSHEET PROGRAM FOR CALCULATING THEpH
- COAGULANT DOSAGE RELATIONSHIPProject :EXAMPLEDate
:06/21/03Coagulant:Alum1. INPUT: INSERT INPUT IN DOUBLE-LINED
CELLSRaw Water
CharacteristicsSpecificAlkalinityInitialConductanceTemp.(mg/L
aspH(mho/cm)(C )CaCO3)8.210020100Commercial Coagulant Solution
CharacteristicsBasicitySulfuric AcidMetalCoagulantUse the following
concentration (mg metal per microliter)(%)(%)ContentSoln.
Specificto determine the required volume when
adding(%)Gravitycommercial strength coagulant with a
microdispenser004.31.33mg metal/L0.0572Type of Coagulant (For Fe
put 0 in cell, for Al put 1)1Calculated Effective Acid Content
(EAC) of the Coagulant Solution0.111(meq/mgAl)Flowrate of Water to
be TreatedFlowrate (gallons per minute)6941 MGD = 694
gpmTargetpH8.20
