Buriganga River Pollution by Tannery Industry
Chapter 4. Buriganga River Pollution by Tannery Industry
4.1 Introduction
Tannery industry fulfills a growing international appetite for leather and earns a large amount of foreign revenue. But the tanneries which are located at Hazaribagh are the major cause of Buriganga river pollution. Tanneries of that area do not contain any treatment plant for treating their chemical effluents coming from tanneries processing. These tanneries discharge their liquid chemical and solid wastes into the river Buriganga. As a result Buriganga river pollution has reached to extreme level and its polluting rate is increasing rapidly.
4.2 Wastes of Tanneries
Tanneries of Hazaribagh produce a large quantity of solid and liquid wastes at the time of processing of hides and skins of animals.
Table.4.1: Average amount of wastes produced by Dhaka Hides and Skins Limited
|Waste Type |Waste Amount (ton) |Percentage (%) |
|Solid |2 |9 |
|Liquid |20 |91 |
|total |22 |100 |
Source: Questionnaire Survey (: July, 2012)
It has been seen that, tanneries produces more liquid toxic waste than solid waste, which are mostly responsible for water pollution on Buriganga.
Tanneries of Hazaribagh produce 25000 tons of solid waste and 40,000 tons of toxic liquid waste everyday (Daniel 2010).
Processing and production of leather and leather products are finished in three sectors, named
a) Wet Blue – processing of raw hides.
b) Crust – coloring of leathers.
c) Finishing – producing leather
4.1 Introduction
Tannery industry fulfills a growing international appetite for leather and earns a large amount of foreign revenue. But the tanneries which are located at Hazaribagh are the major cause of Buriganga river pollution. Tanneries of that area do not contain any treatment plant for treating their chemical effluents coming from tanneries processing. These tanneries discharge their liquid chemical and solid wastes into the river Buriganga. As a result Buriganga river pollution has reached to extreme level and its polluting rate is increasing rapidly.
4.2 Wastes of Tanneries
Tanneries of Hazaribagh produce a large quantity of solid and liquid wastes at the time of processing of hides and skins of animals.
Table.4.1: Average amount of wastes produced by Dhaka Hides and Skins Limited
|Waste Type |Waste Amount (ton) |Percentage (%) |
|Solid |2 |9 |
|Liquid |20 |91 |
|total |22 |100 |
Source: Questionnaire Survey (: July, 2012)
It has been seen that, tanneries produces more liquid toxic waste than solid waste, which are mostly responsible for water pollution on Buriganga.
Tanneries of Hazaribagh produce 25000 tons of solid waste and 40,000 tons of toxic liquid waste everyday (Daniel 2010).
Processing and production of leather and leather products are finished in three sectors, named
a) Wet Blue – processing of raw hides.
b) Crust – coloring of leathers.
c) Finishing – producing leather