Ozone well water treatment

[Wanselm]

Hi all, i need some input. I have a well with high iron and iron bacteria. I want to put together a ozone water treatment system. My piping is 1". Would a 1" ventury be enough, or shall i put 2 or 3 parallel, to maintain the pressure? Would I need to de-gas in the contact tank? I have a lot of questions, if someone can help me.

 

[bimr]

The first thing you need to do is to disinfect your well with some type of chlorine to eliminate the iron bacteria.

 

[Wanselm]

Yes, i let a professional company do a shock chlorinatin, they disinfected the well and the whole system, but it just came back right away, that means the iron bacteria is present in the well water.

 

[EdStainless]

Do you want to treat with ozone or with H2O2?
You can generate either on site, just that the equipment is different.
Ozone is tricky because it will cause accelerated degradation of nearly all polymers and elastomers.
Depending on the concentration that need to reach you may not want a 1" venturi.
A side stream and smaller suction that then mixes into the full volume might deliver enough.
With either you will want to degass before use.
Too much residual in your plumbing can cause a lot of other problems (all rubber seals failing).

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P.E. Metallurgy, consulting work welcomed

 

[Wanselm]

I am open for H2O2 also, is there a machine that can be obtained? I know there are a lot of ozone generators on the market. Something for residential use, that is affordable. I was looking around here in Canada, Ontario. but could not find some for residential units.

 

[bimr]

Did the testing firm provide you with zero “Bac-T tests” for 2 days in a row? I would suspect that the well wasn't properly disinfected.

Iron bacteria produces corrosive acid and should be eliminated.

Use of ozone will not leave a disinfection residual in your system. If you use ozone, you should also use chlorine.

Without a chlorine residual, you may get MIC. Microbiologically influenced corrosion (MIC) is metal deterioration as a result of the metabolic activity of various microorganisms.

This corrosion is promoted or caused by microorganisms, typically chemoautotrophs. This type of corrosion applies to non-metallic objects as well as metals. For instance, aerobic bacteria such as acidithiobacillus thioxidants can cause significant corrosion as it serves as a factor in biogenic sulfide corrosion.

Microbiologically influenced corrosion is also known as biological corrosion and microbial corrosion.

 

[Wanselm]

What about hydrogen peroxide? Would that be a good option? Is it non-corrosive for the system?

 

[pierreick]

hi,
H2O2 is very harmful, pay attention to the concentration used. very powerful chemical difficult to handle safely. Why don't you ask a 3rd party to perform the check and offer you a technical solution?
Pierre

 

[Wanselm]

I tought maybe someone would have answers to my questions.

 

[EdStainless]

Neither O3 or H2O2 have very long persistence.
They are both commonly used to sanitize, especially in Agriculture but not used in municipal water treatment because they don't persist.
They both readily breakdown and become harmless.
It is straightforward to make sure that you don't get excessive carry over.
Cl is a tough way to go.
The dosing has to be tightly controlled.
Too much or too little is worthless and damaging.
And the performance of Chlorination is highly dependent on pH.

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P.E. Metallurgy, consulting work welcomed

 

[bimr]

99.99% of the potable water applications use chlorine because it is inexpensive and reliable.