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Occupational Safety & Health: And Environmental Issues in Leather Tanneries - Couverture souple

Shahzad, Asma

 
9783848494668: Occupational Safety & Health: And Environmental Issues in Leather Tanneries
Couverture souple
ISBN 10 : 3848494663 ISBN 13 : 9783848494668
Editeur : LAP LAMBERT Academic Publishing, 2012

Synopsis

The potential environmental impacts of tanning are significant. Composite untreated wastewater, amounting to 20–80 cubic meters per metric ton (m3/t) of hide or skin, is turbid, colored, and foul smelling. It consists of acidic and alkaline liquors, with chromium levels of 100–400 milligrams per liter (mg/l); sulfide levels of 200–800 mg/l; nitrogen levels of 200–1,000 mg/l; biochemical oxygen demand (BOD) levels of 900 6,000 mg/l, usually ranging from 160 to 24,000 mg/l; chemical oxygen demand (COD) ranging from 800 to 43,000 mg/l in separate streams, with combined wastewater levels of 2,400 to 14,000 mg/l; chloride ranging from 200 to 70,000 mg/l in individual streams and 5,600 to 27,000 mg/l in the combined stream; and high levels of fat. Suspended solids are usually half of chloride levels.Workers may wear masks to prevent smelling odours from hides and chemicals. Many older tanneries are cluttered, hot, and poorly lit and ventilated. More modern facilities usually have more work space and are well lit and ventilated

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Présentation de l'éditeur

The potential environmental impacts of tanning are significant. Composite untreated wastewater, amounting to 20–80 cubic meters per metric ton (m3/t) of hide or skin, is turbid, colored, and foul smelling. It consists of acidic and alkaline liquors, with chromium levels of 100–400 milligrams per liter (mg/l); sulfide levels of 200–800 mg/l; nitrogen levels of 200–1,000 mg/l; biochemical oxygen demand (BOD) levels of 900 6,000 mg/l, usually ranging from 160 to 24,000 mg/l; chemical oxygen demand (COD) ranging from 800 to 43,000 mg/l in separate streams, with combined wastewater levels of 2,400 to 14,000 mg/l; chloride ranging from 200 to 70,000 mg/l in individual streams and 5,600 to 27,000 mg/l in the combined stream; and high levels of fat. Suspended solids are usually half of chloride levels.Workers may wear masks to prevent smelling odours from hides and chemicals. Many older tanneries are cluttered, hot, and poorly lit and ventilated. More modern facilities usually have more work space and are well lit and ventilated

Biographie de l'auteur

I have done M.Phil in Environmental Sciences from Kinnaird College For Women.

Les informations fournies dans la section « A propos du livre » peuvent faire référence à une autre édition de ce titre.

Éditeur
LAP LAMBERT Academic Publishing
Date d'édition
2012
Langue
anglais
ISBN 10 
3848494663
ISBN 13 
9783848494668
Reliure
Broché
Nombre de pages
56
Coordonnées du fabricant
non disponible
Personne responsable
KreGa Onlinehandel GmbH
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info@krega-onlinehandel.de

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