Struvite Prevention Testing Procedure

For each new prospective client we send out this procedure and samples free of charge for your own testing as every operation will get different results and need to optimize the product according to their needs.
 
Use this procedure to optimize our product and use for struvite control and struvite prevention.

Procedure to form struvite and determine when it began forming 
  1. Using filtered centrate from organic material use 900mL filled beakers. 
  2. Obtain a MgCl solution to form struvite. 
  3. (1/20)/900 x 1,000,000 = PPM (parts per million) 
    *(1/20) is one drop of 1mL pipette, 20 drops in a mL 
  4. Every drop of MgCl, stir on high for 1 minute, then let sit for 3 minutes, then
    repeat. 
  5. A total of 7 drops were used to ensure struvite crystals would begin to form
    in the solution. Using light can positively identify this. 
The procedure used to determine dosage and application
  1. Using filtered centrate from organic material use 900mL filled beakers. 
  2. First needed to determine mL of product used. 
  3. Started with a 30/60/90 ppm dosage. 
    Ppm/ SG x L = μl (μl= microliter) 
  4. X/(1.03)x0.9=μl 
  5. 30ppm = 26.21 μl, 60ppm = 52.43 μl, 90ppm = 78.64 μl 
  6. With 4 stirrers, one control, one each of 30/60/90 dosage fill the beakers of
    centrate with the amounts of Struvite Dispersant. 
  7. Stir for one minute on high to make sure properly mixed as to determine which dosage will prevent the formation of struvite. 
  8. Once Struvite Dispersant is mixed, continue to add drops of MgCl (up to 7) to then encourage the formation of struvite, stirring on high for one minute, then letting it sit for 2 minutes. 
  9. After the final drop, allow to sit for 10 minutes or more to let struvite settle at the bottom to compare amounts left in the beakers. 
Conclusions: 
  1. With 7 drops of MgCl, we were able to get struvite crystals to form in the centrate. 
  2. With increased PPM, we progressively saw less struvite in the centrate with approximately 70% > 50% > 30% through what was noticed visually. 
  3. In the 90 ppm solution could not see struvite flowing during the stirring. 
  4. Smaller particles were also in the 90 ppm solution, reduces potential and decreases the size if it does form. 
  5. For further testing, need a way to weigh the amount of struvite left within the beakers. 
  6. Struvite Dispersant will keep the smaller, remaining Struvite particles in solution.