Pretreatment of Reactive Dye from Textile Wastewater by Coagulation Technology
A physicochemical treatment was applied to study on removal of commercially used reactive dye and investigate the effectiveness of coagulation-flocculation from textile wastewater. Three types of coagulants were used like aluminium sulphate (alum), polyaluminium chloride (PAC), and magnesium chl...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
| Published: |
IRJET
2016
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| Subjects: | |
| Online Access: | http://umpir.ump.edu.my/id/eprint/17771/ http://umpir.ump.edu.my/id/eprint/17771/ http://umpir.ump.edu.my/id/eprint/17771/1/ftech-2016-zularisam-pretreatment%20of%20reactive.pdf |
| Summary: | A physicochemical treatment was applied to study on removal of commercially used reactive dye and investigate the effectiveness of coagulation-flocculation from textile wastewater. Three types of coagulants were used like
aluminium sulphate (alum), polyaluminium chloride (PAC), and magnesium chloride (MgCl2). Polyelectrolyte, Koaret PA
3230 was used as the coagulant aid. The coagulant dosage between 400 ppm to 5,000 ppm was studied using jar test. The
changes of pH, types and dosage of coagulant, and the
addition of coagulant aid on the percentage removal and the
concentration of the dyes were determined through colour
point. The results show that up to 90% colour removal for
reactive dye could be achieved using alum of concentration
6,000 ppm and pH 2.4. Meanwhile, 99 % colour removal could
be achieved using MgCl2with concentration of 4,000 ppm a
nd pH 10.4, whereas 100% colour removal could be achieved
using PAC with concentration of 2,000 ppm and pH 4.1. Among
the coagulants used, PAC was the most effective coagulant in
treating each dye, with the colour removal up to 100% at the
dosage of 800 ppm. The flocs settling time for the treatment
with MgCl2 was shorter than the treatment with PAC and the
treatment with Alum was longer than the treatment with MgCl2 and PAC. This result can contribute some knowledge on the use of effective coagulants in treating textile industrial wastewater. |
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