Tannery wastewater treatment - origin, composition, treatment process

source
Naturgerechte Technologien, Bau- und Wirtschaftsberatung (TBW) GmbH, Frankfurt
(Germany), April 2002

Treatment of Tannery Wastewater.pdf

Manufacturing of leather, leather goods,
leather boards and fur produces numerous
by-products, solid wastes, high amounts of
wastewater containing different loads of
pollutants and emissions into the air. The
uncontrolled release of tannery effluents to
natural water bodies increases health risks
for human beings and environmental
pollution. Effluents from raw hide
processing tanneries, which produce wet-blue,
crust leather or finished leather
contain compounds of trivalent chromium
(Cr) and sulphides in most cases. Organic
and other ingredients are responsible for
high BOD (Biological Oxygen Demand)
and COD (Chemical Oxygen Demand)
values and represent an immense
pollution load, causing technical problems,
sophisticated technologies and high costs
in concern with effluent treatment.

Comparison of different advanced oxidation process to reduce toxicity and mineralisation of tannery wastewater