Suscripción a Biblioteca: Guest
Portal Digitalde Biblioteca Digital eLibros Revistas Referencias y Libros de Ponencias Colecciones
International Journal on Algae
SJR: 0.219 SNIP: 0.261 CiteScore™: 0.24

ISSN Imprimir: 1521-9429
ISSN En Línea: 1940-4328

International Journal on Algae

DOI: 10.1615/InterJAlgae.v21.i1.60
pages 83-96

Integrated Study on Nutrients and Heavy Metals Removal from Domestic Wastewater using Free and Immobilized Scenedesmus rubescens (Chlorophyta, Chlorophyceae)

S. K. Pandian
Algae Biomass Research Lab., Department of Biotechnology, School of Agriculture and Biosciences, Karunya Institute of Technology & Sciences, Coimbatore 641114, Tamil Nadu, India
J. Thomas
Algae Biomass Research Lab., Department of Biotechnology, School of Agriculture and Biosciences, Karunya Institute of Technology & Sciences, Coimbatore 641114, Tamil Nadu, India

SINOPSIS

Microalgae have immense potential in remediating toxic content in wastewater and serve as prospective organisms in the treatment of wastewater. Our present study reduces the input cost for microalgae cultivation using wastewater as a growth medium. Scenedesmus rubescens (P.J.L. Dangeard) E. Kessler et al., KACC 2, isolated from Siruvani freshwater (India), was investigated for removal of nitrates, phosphates and heavy metals by growing microalgae in wastewater both as free cells and immobilized algal cells. Among the various polymers used for immobilization, beads with good stability were selected (annate Mid alginate-carrageenan) for phycoremediation. Growth and uptake of nutrients in the culture were compared and reduction in the levels of nitrates, phosphates, and heavy metal contents were monitored periodically. Reductions of phosphates (98%) and nitrates (75%) were observed with alginate algal beads. Mn, Zn, and Cu were more reduced by algae beads than with free cells. The study concludes that the immobilized microalga were effective in wastewater treatment, as with free cells, by utilizing nutrients and serve as a cost-effective green technology in biomass generation.