This ppt is related to Environmental Engineering.This ppt explains usage of agricultural waste for de-colourisation of textile industry waste water.

1. TEXTILE INDUSTRY WASTE
WATER PURIFICATION USING
AGRICULTURAL WASTE
Presented By:
R.BHAVANA
13701A0109

2. Contents
 Introduction
 Need for textile industry waste water
purification
 Absorption and adsorption
 Agricultural waste as adsorbent

3. Introduction
Textile industry waste water contains
 BOD and COD value
 Suspended solids
 Toxic compounds and
 The color that is perceived by human
eyes at very low concentration

4. Need for textile industry waste
water purification
 Dyes- decreases the sunlight entering
the water bodies
 TSS- cause for producing of
pathogens
 Toxic compounds- Harmful to human
health
 These lead to harmful effects both on
aquatic and human life

5. Purification process
 Coagulation
 Ultra-filtration
 Adsorption
 Photo-oxidation
 Ion exchange method
 Among them adsorption is the best
method

6. Absorption and Adsorption

7. Adsorbate
 An adsorbate is any substance that has
undergone adsorption on the surface

8. Adsorbent
 A material that extracts certain substances
from gases , liquids, or solids by causing
them to adhere to it’s surface without
changing it’s physical properties.

9. Adsorbents
 Activated carbon
 Silica gel
 Activated alumina
 Activated carbon-widely used
 All these are of high cost

10. Agricultural wastes as
Adsorbents
 Rice husks
 Corncob
 Coir-pith
 Saw dust
 Bagasse pith
 Nut shells- Ground nut shells, Hazle nut shells,
etc…
 Fruit peels-Orange peels, banana peels, etc…
 Leaf powders
 Used tea leaves
 Fruit shells-Tamarind fruit shells

11. Preperation of adsorbents from
agricultural waste
 There are different methods for
different wastes
 For example, let us take the
preperation of adsorbent by using
ground nut shells and used tea
powder.

12. Ground nut shell as adsorbent
 Preperation-Ground nut shells-
Collected-Washed with distilled water-
boiled at 100 degree centigrade-30
mins-dried at 80 degree centigrade-48
hrs-grounded-passed through 25
mesh size sieve.
 Spent tea waste-collected-washed
with distilled water-3-4 times boiled at
100 degree centigrade-30 mins-dried
at 80 degree centigrade-48 hrs-
passed through 25 mesh size sieve

13. Ground nut shells Used tea powder

14. Procedure
 Take 100 ml sample in 250 ml conical
flask-adsorbent added-shaking the
sample for 100 mins-color removal
efficiency calculated-using colorimeter.
 It is found that ground nut shell is
effective in removal of Methylene blue.

15. Conclusion
 Although the removal efficiency is less
compared to activated carbon,
agricultural waste is of low cost and is
eco-friendly.