Mumbai university > Civil > SEM 8 > Industrial Waste Treatment

Marks: 5M

Year: May 2012,

Volume reduction is the primary treatment given to the waste and can be accomplished by the following methods:

• Classification of waste
• Conservation of waste water
• Changing production technique
• Reuse and recycling
• Elimination of Batch and plug discharge.

Classification of waste:

• A survey is to be conducted to understand different process & sources of waste by drawing the mass flow diagram. This will able to separate lesser and most polluted waste.

• The lesser polluted waste can be treated by some preliminary treatment and discharge it without being treated.

• Elimination of this less polluted waste from the most polluted waste which needed a treatment reduces the volume of waste to be treated.

• The cooling water from industrial process is mostly lesser pollutant and can be reutilized and eliminated from the treatment process.

• Waste from mostly the manufacturing process need to be treated. For eg. White water from paper production unit, Organic waste from dairy industries.

Conservation of waste water:

• Conservation begins when the industry changes from open to close system.

• A case must be taken such that the conservation practices adopted should not give a net result as a loss.

• An awareness program should be developed to eliminate the excessive wastage of resources.

• A multiple reusing of the water should be practiced as far as possible.

• Some of the conservation techniques are 1) install meter in each department to make operator cost and quantity important. 2) Regulate pressure to prevent needless wastage.