Strong Sulfide Odour in Water

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I have a problem with very strong odour of sulfide before the RO and in the permeate water. The odour stays the same strength.

I know hydrogen sulfide passes as carbon dioxide.   

I am thinking of raising the pH to 9 and increasing the dose of antiscalant to stop dosing the acid before RO.

The water source is a well the depth of 25 m and water should be used for drinking and human consumption but due to the odour it can now be used almost only for washing clothes and irrigation.

Does anyone have suggestions on how to get rid of the sulfide odour?

I read a lot about hydrogen peroxide, aeration and chlorination but the retention time and treatment should be short. 

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