By-products do not fall within very many ranges of the human activity on by any means only in the industry.

There one calls "by-product" traditionally everything, which results during the production of a Hauptprodukts besides and often also unwanted. Frequent industrielle of by-products are e.g. the carbon dioxide in the energy industry and with nearly all forms of the burn, or different cinders - for instance in many branches of the metallurgy and with blast furnaces. Also in the chemical industry it lacks not on "By-products" - and not all are still as good to use as molasses or gypsum in the foodstuffs industry (e.g. see Jungbunzlauer. Even nature near activities by-products bring so-called weeds with itself - not least in the garden or in the agriculture.

Often today such by-products no more - like usually in former times - are deposited or burned, but supplied to a recycling. Sometimes already in earlier times it happened that by-products gained significance in such a way that the relationship to the Hauptprodukt turned around:

• Coke with the production of "town gas" (degassing of hard coal)
• Tar with the production of oil - (S. now also Teerschiefer)
• Ammonia as by-product of the gas production - and
• recently for instance with the sawdust - one planes where, fly splinters, which are as pressed briquettes an in demand refinement for heating purposes.

Also in the transferred sense often of "by-products" one speaks -

• for instance with besides developed inventions of Wissenschaftern or technicians,
• at the auto+free day in the attitude to the own environmental pollution, or
• in space travel.

Articles in category "By-product"

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