Definition of secondary treatment in English:

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secondary treatment

noun

The further treatment of sewage effluent by biological methods following sedimentation.
Example sentences
  • Most treatment plants also have secondary treatment, whereby sewage is stirred and oxygen is blown in to help beneficial bacteria breed and eat up the ‘solids.’
  • Ecosystem damage and fish toxicity occurred downstream from mills that did not use chlorine, even in advanced mills with secondary treatment processes.
  • This waiver allows for less than full secondary treatment of the sewage being discharged into the ocean off Huntington Beach.

For editors and proofreaders

Syllabification: sec·ond·ar·y treat·ment

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