Colour Removal from Biologically Treated Textile Dyeing Wastewater with Natural and Novel Pre-Hydrolysed Coagulants

Abstract

In this paper, natural (chitosan and starch) and novel pre-hydrolysed coagulants (PACl, PAFC, PFS and PFC) were performed with coagulant aid for colour removal from a biologically treated textile wastewater including multiple dyes (indigo and reactive). According to the experimental results, optimum coagulant dosages which provide the best colour removal for PACl, PAFCl, PFS (%10) and PFCl (%10), were determined as 80 mg/L, 10 mg/L, 3 mg/L and 40 mg/L, respectively, at pH 4 and pH 6,98 (natural pH of studied wastewater, pHnww). Maximum colour removal was determined as 97% for PAFCl, minimum removal was 23% for PFCl at pH 4, while it was calculated as 75% and 52% at pHnww. COD removal was observed as 45% at pH 4 and 55% at pHnww for maximum colour removal. Sludge production rate was measured as 71 kg/d while this rate was found as 60 kg/d at pHnww. On the other hand colour removal efficiencies were determined in the range of 55-88% at pHnww and pH 3 for chitosan while it was calculated as 52% for starch at pHnww and pH 9. According to the results, PAFCl and chitosan were found as the best coagulants for colour removal of investigated textile wastewater. According to the economic analysis results, the best colour effiency were found as 97% with PAFCl and the second best colour removal were found as 88% with Chitosan. Due to lower sludge production than PAFCl and lower chemical costs; Chitosan can be considered as a reasonable alternative for this wastewater.

Keywords

• Natural and Novel pre-hydrolysed coagulant,Colour removal,Textile wastewater,PAFCl,Chitosan

References

1. 1. Yildiz Tore G, Çelik S.Ö, Gürkan R, Kırhan Sesler Ş. Determination of the Best Available Coagulatıon/Flocculatıon Technology with novel pre-hydrolysed coagulants for colour removal from biologically treated textile wastewater. Journal of Selçuk University. 2014; 1-12.
2. 2. Robinson T, McMullan G, Marchant R, Nigam P. Remediation of dyes in textile effluent: a critical review on current treatment technologies with a proposed alternative. Bioresource Technology. 2001; 77: 247–255.
3. 3. Shin C.H. and Bae J.S. A stability study of an advanced co-treatment system for dye wastewater reuse. J. Ind. Eng. Chem. 2012; 18: 775–779.
4. 4. Akshaya K.V, Rajesh R. D, Puspendu B. A review on chemical coagulation/flocculation technologies for removal of colour from textile wastewaters. Journal of Environmental Management. 2012; 93: 154-168.
5. 5. Mohammed A.D, Hendriks J. Effective Removal of Heavy Metal Ions Using Glycerol and Starch Xanthate. JOTCSA. 2017; 4(3): 1031-1044.
6. 6. Jiang J.Q. and Graham N.J.D. Pre-polymerised inorganic coagulants and phosphorus removal by coagulation-a review. Water SA. 1998; 24: 237-244.
7. 7. Gregory J, Rossi L. Dynamic testing of water treatment coagulants. Water Science and Technology. 2001; 1: 65-72.
8. 8. Gao B, Yue Q, Miao J. Evaluation of polyaluminium ferric chloride (PAFC) as a composite coagulant for water and wastewater treatment. Water Science and Technology. 2001; 47 (1): 127-132.

9. 9. Wang X, Zeng G, Zhu, J. Treatment of jean-wash wastewater by combined coagulation, hydrolysis/acidification and Fenton oxidation. J Hazard Mater. 2008;153(1-2):810-6.
10. 10. Wang R.M, Wang Y, He Y.F, Li F.Y, Zhou Y, He N.P. Preparation of solid composite polyferric sulfate and its flocculation behavior for wastewater containing high concentration organic compounds. Water Science and Technology. 2010; 61(11):2749 – 2757.
11. 11. Chen T, Gao B, Yue Q, 2010. Effect of dosing method and pH on colour removal performance and floc aggregation of polyferricchloride-polyaminedualcoagulant in synthetic dyeing wastewater treatment. Colloids and Surface A: Physicochemical and Engineering Aspects. 2010; 355: 121-129.
12. 12. Wei J, Gao B, Yue Q, Wang, Y. Effect of dosing method on colour removal performance and flocculation dynamics of polyferric-organic polymer dual-coagulant in synthetic dyeing solution. Chemical Engineering Journal. 2009; 151 (1–3):176-182.
13. 13. Hascakir B, Utilization Of Natural Polyelectrolytes In Wastewater Treatment. İzmir. Master thesis. Graduate School of Natural and Applied Sciences of Dokuz Eylül University. 2003.
14. 14. Sanghi R. and Bhattacharya B. Comparative evaluation of natural polyelectrolytes psyllium and chitosan as coagulant aids for decolourisation of dye solutions. Water Quality Research Journal of Canada. 2005; 40: 97-101.
15. 15. Ganjidoust H, Tatsumi K, Yamagishi T, Gholian RN. Effect of synthetic and natural coagulant on lignin removal from pulp and paper wastewater. Wat. Sci. Technol. 1997; 35: 291–296.
16. 16. Rodrigues AC, Boroski M, Shimada NS, Garcia JC, Nozaki J, Hioka N. Treatment of paper pulp mill wastewater by coagulation– flocculation followed by heterogenous photocatalysis. J. Photochem Photobiol A Chem. 2008; 194: 1–10.
17. 17. Wang JP, Chen YZ, Ge XW, Yu HQ. Optimization of coagulation– flocculation process for a paper-recycling wastewater treatment using response surface methodology. Colloids Surf A Physicochem Eng Aspects. 2007; 302: 204–210.
18. 18. Jincheng Wei, A, Baoyu G, Qinyan Y, Yanfstarch W. Effect of dosing method on colour removal performance and flocculation Dynamics of polyferric-organic polymer dual-coagulant in synthetic dyeing solution. Chemical Engineering Journal. 2009; 151: 176–182.
19. 19. Tun L.L, Baraoidan W.A, Gaspillo P.D, Suzuki M. A study on the relative performance of different coagulants and the kinetics of COD in the treatment of a textile bleaching and dyeing industrial wastewater. ASEAN Journal of Chemical Engineering. 2007; 7: 49-60.
20. 20. Szyguła A, Guibal E, Ariño Palacín M, Ruiz M, Sastre AM. Removal of an anionic dye (Acid Blue 92) by coagulation-flocculation using chitosan. J Environ Manage. 2009 J;90(10):2979-86.
21. 21. Mahmoodi NM, Salehi R, Arami M, Bahrami H. Dye Removal from Coloured Textile Wastewater Using Chitosan in Binary Systems. Desalination. 2011; 267(1): 64-72.