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APHA

SMWW 2350

Oxidant Demand/Requirement

2023

6

Standard methods for the examination of water and wastewater 543.3 APHA 24th ed. Ref. (Treatises&monographs FL2)

Oxidants are added to water supplies and wastewater primarily for disinfection. Other beneficial uses include slime removal, oxidation of undesirable inorganic species (e.g., ferrous ion, reduced manganese, sulfide, and ammonia) and oxidation of organic constituents (e.g., taste- and odor-producing compounds). Oxidant demand is the difference between the added oxidant dose and the residual oxidant concentration measured after a prescribed contact time at a given pH and temperature. Oxidant requirement is the oxidant dose required to achieve a given oxidant residual at a prescribed contact time, pH, and temperature...