System and process for treating water

A system for removing one or more dissolved constituents at from a feedstock, the one or more dissolved constituents comprising dissolved hydrogen sulphide and a first amount of iron, the system comprising:

• at least one stripping vessel wherein the feedstock contacts a stripping gas to produce a gas stream comprising at least hydrogen sulphide gas, and an intermediate feedstock, within the stripping vessel, comprising the one or more dissolved constituents and the first amount of iron,
• a first conduit connecting the at least one stripping vessel to an oxidation reactor for conveying the gas stream comprising the hydrogen sulphide gas to the oxidation reactor, wherein the gas stream contacts an oxidizing agent to oxidize the hydrogen sulphide gas to produce sulphuric acid, and
• a second conduit connecting the oxidation reactor to the at least one stripping vessel for conveying the produced sulphuric acid from the oxidation reactor to the at least one stripping vessel to reduce a pH value of the intermediate feedstock within the stripping vessel, and
• wherein a cationic coagulant comprising ferric iron is added to the intermediate feedstock within the stripping vessel to convert the one or more dissolved constituents to an insoluble form, and wherein the insoluble form and the first amount of iron are removed from a liquid fraction of the intermediate feedstock.