Cosmetic and Personal Care Manufacturing

The best water quality is exactly as pure as you need & no more.

That may sound like a smart-alec remark, but the fact is that increasing water quality costs time and money (both capital & operating), and you quickly reach the point where you have to worry about piping & boiler or heat exchanger material compatibility as the higher purity water causes leaching problems. It also depend on the stability of your formulations towards the particular hardness & other dissolved material profile of your supply water.

If you are looking for setup ideas, I use an RO system with strong base DI polishing (worker & polisher setup). We run to 5 uS between tank changes- this starts off at a much higher purity than we need, but the variance does not affect the consistency of our formulations.

noted. However,

My spec is : < 2mirconS/cm Conductivity,

<1ppm SiO2,

5-7 PH at 25C.

I am in doubt that Cation polisher is not right. in one day we use 20 MTS of water. we almost need to regenerate the water in the afternoon as the PH always dropped below 5 PH. Please adivse

**Don't put email addresses on**

20,000L of water? What is your setup? You are obviously regenerating your own tanks; are you running RO first stage or just worker/polisher sets, and how old is the resin? What is the quality of the water you are feeding the polisher?

1. average production of DI water.

2.We dont use RO

3 is a twin bed cat/anion column

4. just change all the Cat/anion, polisher column, sand column last Sat.

5. Yesterday we did throw about 8 MTS of DI water to drain due to off spec PH.

6. I have no idea on the water qaulity on feeding to polisher.

If your pH is low, this is due to anion exhaustion not to the cation. Without knowing what the feedwater quality & composition is you have no way of knowing if your system is working correctly. As an example, water with a high level of bicarbonate has a stoichiometry of 1:2 cation/ anion consumption (I assume your system does not have a degassing unit?). If I read #4 correctly you have 2 x cat, 2 x anion (what cu ft?), polisher column (is this mixed bed?) & sand filter- please confirm. Do you have a degassing tower?

The next question is; how does this usage compare historically?

I will come back to you after i got all data.

I have to highlight the issue that production faces as mention below:

• Di water have to be discarded the moment we detected non compliance quality. So far we have discarded about 3000 ton with quick response

ph is not consistent.

the capacity the column can churn out for us that is about 90 ton after each regeneration. According to DI water system supplier the next level to go is to upsize the column to a bigger capacity. Its a big job whereby have to change all the pvc pipping outside only. Then he suggested to go for RO water.

SP1 and 2 = sample points , JBA = city water