Scope of reuse of dyebath wastewater (anionic dye) treated by Chitosan-ZnO composite

Scope of reuse of dyebath wastewater (anionic dye) treated by Chitosan-ZnO

composite

Tozammel Haque (115027)Hasibul Haque Chowdhury (115030)Md. Fazlul Haque (115034)Md. Repon Shake (115035)

Dhaka University of Engineering & Technology.








Synthesis of ZnO nanopartical

Zinc oxide nanoparticle

Composite

Sonicated for 30 min

Heated in water bath (700-800C)

Filter and washed with distilled water

Dried in oven at 500C for 1 hour

1 gm chitosan


Treated water

Addition of acetic acid to bring PH 7

Stir at 200 rpm and 700C temperature

Composite dosing without coagulant and kept 1 hours

Filtration


Treated water

Coagulant (alum) dosing and kept 3 minutes at PH 5

50 ml of wastewater

Addition of 0.1M NaOH to bring PH 7

Stir at 200 rpm and 700C temperature

Composite dosing with coagulant and kept 1 hours

Filtration


Measurement of absorbency by spot, drop and column test

Analysis of different samples with different test

parameter

Strength test

Reflectance test




Centrifuge Machine

0.8 gm/100ml composite dose sample



Chitosan ZnO composite

Dye Residual

Raw textile effluent






0.2gm/100ml 0.4gm/100ml 0.6gm/100ml 0.8gm/100ml


0.4gm/100ml 0.6gm/100ml 0.8gm/100ml





Decolour dyebath wastewater.

Reuse treated water in textile pretreatment bath.

Non toxic treatment facility.

Save water consumption and environmental impact.

Successfully decolour dyebath wastewater (about 90%)

Reused treated water in textile pretreatment bath.

Got optimum whiteness, absorbency,lower strength and weight losses of pretreatmented fabric.


