Article History

Received 18 August 2014
Received in revised form 22 August 2014
Accepted 30 August 2014
Available online 10 October 2014

Keywords

Biological Treatment, Consortium, Chlorella vulgaris LS120, Scenedesmus obliquus LS121, Tannery effluents.

Phycoremediation for Leather Industrial Effluent - Treatment and Recycling Using Green Microalgae and its Consortia

Sanniyasi Elumalai1*,   Selvarajan Ramganesh1, Anuvarshini2, Thimmarayan Sangeetha3, David Roopsingh3

1Department of Plant Biology and Biotechnology, Presidency College (Aut), Chennai - 600 005, India.

2Department of Biotechnology, Rajalakshmi Engineering College, Chennai - 602 105, India.

3Department of Chemistry, Presidency College (Aut), Chennai – 600 005, India.

*Corresponding author; ananandal@gmail.com; Mob: +919710116385   

ABSTRACT: The leather industry represents an important economic sector in many countries especially in India.  On the other hand, it generates large amounts of wastewater containing ammonium ion, sulphides, surfactants, acids, dyes, sulfonated oils and organic substances including natural or synthetic tannins agents. However treatments of these effluents using physical and chemical methods are quite expensive technology. Most leather industries construct a number of shallow evaporation ponds or Central Effluent Treatment Plant (CETP) to manage the effluent despite there is still a considerable amount of pollution load to be dealt.  Hence the present work is focused on biological treatment to reduce the pollutants of tannery effluents through microalgal treatment process taken from the leather industries central treatment plant, Madhavaram, Chennai District, Tamil Nadu, India.  The effluent samples were characterized before and after the treatment by measurements of Physico – chemical properties. In our findings we observed that the consortium of Microalgal species such as Chlorella vulgaris LS120 and Scenedesmus obliquus LS121 at various concentrations effectively reduces the TDS, COD and BOD levels of effluents as confirmed by the Physico – Chemical measurements at regular interval of 7 days for a period of 21 days. The concentration of algal consortium and effluent 250: 250 was found to effectively reduce TDS, BOD and COD levels when compared to individuals.  Hence this green remediation technology avoids use of chemicals and the whole process of effluent treatment is simplified and eco – friendly.

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