[hong2803]

Belassi said:

You appear to be using whey filtrate as a substitute for surfactants, to achieve foaming. (Your active surfactant % appears to be far too low to make an effective shampoo, otherwise.)
I suggest the foaming problem is a direct result of this design approach.

I agree with you. That is why I try to find the proper approach. Could you please suggest one?

[hong2803]

Pharma said:

Could you work under reduced pressure (vacuum)?

Yes, I am using vacuum. But as my observation, when so much foam is already created in the mixing tank, vacuum is not effective in reducing the foam.

[hong2803]

Fekher said:

@hong2803 try to reduce the level of surfactants it will help for sure. 

I can not change the formula. I can only modify the process (the order of adding raw material) and the parameters of equipment. 
So here is my formula:
1. Sodium Laureth Sulfate: 17.6%
2. Disodium Laureth Sulfosuccinate: 2.9%
3. Cocamidopropyl Betaine: 4.9%
4. Lactic acid
5. Whey Filtrate
6. PEG-7 Glyceryl cocoate
7. Sodium Laureth Sulfate (and) Glycol Distearate (and) Cocamide MEA (and) Laureth-10 (pearlizing agent)
8. Tetrasodium EDTA
9. Acrylates Copolymer
10. Guar gum
11. PEG-120 Methyl Glucose Dioleate
12. Other preservatives and moisturizer.
13. Water: 62%.

Water is added first in the mixing tank (76% of the amount of water) and then add the Whey Filtrate via an high inline mixer. And that leads to so much foam. I wonder which material should be added to the tank firstly and the order of other raw materials to minimize the amount of foam.