Wastewater Neutralization Calculations - U.S. units    
         
1.  Caustic Addition - (pH is too low and must be raised)    
         
Instructions:  Enter values in blue boxes.  Spreadsheet calculates values in yellow boxes  
Inputs         Calculations     
gpm
WW Flow Rate, Qww = gal/day   Moles/L of OH- needed = moles/L
Incoming pH,  pHin  =     NaOH rate needed  = moles/day
Desired pH,  pHout  =     Caustic solution rate  = lb/day
Caustic sol'n % NaOH  =     Caustic solution rate  = gal/day
Caustic sol'n density, r = lb/gal   Daily cost of caustic = $/day
Caustic solution cost  = $/lb    
Wastewater Neutralization Calculations - U.S. units    
         
2.  Acid Addition - (pH is too high and must be lowered)    
         
Instructions:  Enter values in blue boxes.  Spreadsheet calculates values in yellow boxes  
Inputs         Calculations     
gpm
WW Flow Rate, Qww = gal/day   Moles/L of H+ needed = moles/L
Incoming pH,  pHin  =     H2SO4 rate needed  = moles/day
Desired pH,  pHout  =     Acid solution rate  = lb/day
Acid sol'n % H2SO4  =     Acid solution rate  = gal/day
Acid sol'n density, r = lb/gal   Daily cost of acid = $/day
Acid solution cost  = $/lb