Reduction of hydrogen sulfide and/or malodor gassing from water via the addition of peroxyacetic acid/hydrogen peroxide product

A method of reducing the odor released by a wastewater treatment system while preserving the vitality of waste-consuming organisms within the system, the method comprising the steps of:

• determining the SRP PAA demand of the wastewater,
• determining the aerobic PAA demand of the wastewater,
• adding a composition to the wastewater treatment system containing wastewater in an amount such that it is in excess of the SRP PAA demand but is below the aerobic PAA demand, and the composition increases the amount of sulfates within the wastewater to an amount more conducive to the proliferation of SRP,
• wherein the composition comprises at least one percarboxyacid and wherein there is substantially no residual peracid after 1 hour because all of it reacted with less than all of the microbial population within the wastewater.