Solution I'll advise  you ...

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Solution

I'll advise  you dose the water with  hydrogen peroxide, an oxidizing agent and a disinfectant, hydrogen peroxide will oxidize the hydrogen sulfide to an elemental sulfur, which can be removed by passing the water through activated carbon media tank..H2O2 also stop the growth of  anaerobic organisms

H2O2 + H2S    =  2H2O + S
 

H2O2 = H2O +  1/2 O2