Use of immobilised Chlorella vulgaris for the removal of colour from textile dyes
Discharge of textile wastewater containing toxic dyes can adversely affect the aquatic ecosystems and human health. The objective of the present study was to investigate the potential use of immobilised Chlorella vulgaris UMACC 001 in removing colour from textile dyes (Supranol Red 3BW, Lanaset Red 2GA and Levafix Navy Blue EBNA) and textile wastewater (TW). Two immobilisation matrices were used, namely 1% κ-carragenan and 2% sodium alginate. Of the three dyes tested, the highest percentage of colour removal was from Lanaset Red 2GA. The cultures immobilised in 2% alginate attained the highest percentage of colour removal (44.0%) from the dye at an initial concentration of 7.25 mg L−1. Immobilised cultures in alginate also removed higher percentage of colour (48.9%)from the TW, than the suspension cultures (34.9%). Aeration did not enhance the percentage of colour removal but increased the colour intensity of the wastewater instead. C. vulgaris immobilised in alginate will be useful for final polishing of textile wastewater after undergoing primary treatment before discharge.
KeywordsImmobilised algae Chlorella vulgaris Colour removal Textile dyes Bioremediation
This study was supported by a grant from the Ministry of Science, Technology and Innovation, Malaysia (03-01-01-001 BTK/ER/020). The authors would like to acknowledge Kim Fashion Knitware (M) Sdn. Bhd. for providing the textile dyes and wastewater for this study. Thanks to Tacara Sdn. Bhd. for providing the carrageenan for this study.
- APHA (1998) Standard methods for the examination of water and wastewater. American Public Health Association, American Water Works Association, Water Pollution Control Federation, United Book, BaltimoreGoogle Scholar
- Chu WL, Ramadhona MS, Phang SM (2007) Assessment of three tropical chlorophytes as bioassay organisms for nitrogen and phosphorus enrichment in freshwater ecosystems. Malay J Sci 26(2):15–25Google Scholar
- Hall BM, Loughlin AJM (2001) Immobilized cells in bioremediation. In: Wijffels RH (ed) Immobilized cells—laboratory manuals. Springer, Berlin, pp 213–233Google Scholar
- Lim SL (2005) Use of microalgae in bioremediation of textile wastewater. M Sc Thesis (unpublished), University of Malaya, pp 215Google Scholar
- Malaysian Textile Manufacturers Association (2008) Statistic of Malaysia import and export. http://www.fashion-asia.com/page.cfm?name = Statistic%20(Import%20and%20Export). Accessed 21 Aug 2008
- Nichols HW (1973) Growth media—freshwater. In: Stein J (ed) Handbook of phycological methods: culture methods and growth measurements. Cambridge University Press, Cambridge, pp 7–24Google Scholar
- Phang SM, Chu WL (1999) University of Malaya Algae Culture Collection (UMACC): catalogue of strains. Institute of Postgraduate Studies and Research, University of Malaya, p 77Google Scholar
- Phang SM, Chu WL (2004) The University of Malaya Algae Culture Collection (UMACC) and the potential applications of a unique Chlorella from the collection. Jap J Phycol 52:221–224Google Scholar
- Strickland JD, Parsons TR (1968) A practical handbook of seawater analysis. Bull No 167, Fisheries Res Bd Can, pp 310Google Scholar
- Yahi H, Elmaleh S, Coma J (1994) Algal flocculation sedimentation by pH increase in a continuous reactor. Water Sci Technol 30:259–267Google Scholar