Definitions for "Tertiary treatment"
An enhancement of normal sewage treatment operations to provide water of potable quality using further chemical and physical treatment; the highest drinking water standard achieved in the U.S.
The further processing of waste water in a sewage treatment plant which may involve further reduction in nutrient levels, filtration, use of constructed wetlands and higher levels of disinfection.
Removal of nitrates, phosphates, chlorinated compounds, salts, acids, metals and toxic organics after secondary treatment (see primary and secondary treatment).