Sewage water - H2S removal test

Sewage treatment is the process of removing contaminants from municipal wastewater, containing mainly household sewage plus some industrial wastewater. Physical, chemical, and biological processes are used to remove contaminants and produce treated wastewater that is safe enough for release into the environment.
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[@Vito_Tuxedo]

The low. resolution video does not clearly show the units being measured. What is the endpoint concentration of dissolved H2S following treatment? What was the concentration of dissolved H2S in the wastewater before treatment? What volume of treatment reagent was required to achieve the endpoint concentration? Can the treatment be used to obtain endpoint concentrations

[@tareqhawary3079]

thanks for sharing that. can you explain more. because i need a method to purify biogas to use it in generator.