By-product

By-product

[bahy-prod-uhkt]
A by-product is a secondary or incidental product deriving from a manufacturing process, a chemical reaction or a biochemical pathway, and is not the primary product or service being produced. A by-product can be useful and marketable, or it can have negative ecological impact.

Major by-products

Animal sources

Vegetation

Minerals and petro chemicals

Other

  • sludge - from wastewater treatment

See also

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