Table of Contents

2017 Month : May Volume : 3 Issue : 2 Page : 23-26


Jitha G1, Madhu G2

Corresponding Author:
Dr. Jitha G,
Postdoctoral Fellow, Division of Safety and Fix Engineering,
School of Engineering, Cochin University of Science and Technology,
Kochi-22, India.



Chemical industries pollute the fresh as well as marine water resources. This paper presents the removal of chemical pollutants using filamentous cyanobacteria in column-type photobioreactor. Two different species of cyanobacteria collected from refinery effluent were used for this study. Bio Discs of two different species were prepared separately and compared the removal efficiency. Two different concentrations of effluent were prepared and applied to the photobioreactor. Effluent samples were analysed for phenol, sulphide and COD at every 2 days intervals up to 6 days. Both the microorganisms could grow well in the effluent removing the dissolved chemicals from waste water. Phenol content of Low Strength Effluent (LSE) was reduced to 8 mgL-1 from an initial amount of 103 mgL-1 after 4 days of treatment by Phormidium tenue. Both the organisms could remove sulphide effectively from low strength effluent. Oscillatoria acuminata could not remove higher concentrations of sulphide from Medium Strength Effluent (MSE) COD of the low strength effluent was reduced to zero by P. tenue from an initial amount of 240 mgL-1, whereas O. acuminata could reduce to 16 mgL-1after 6 days of treatment. COD was reduced to 16 mg L-1 from an initial value 416 mg L-1 from MSE and 92% removal of COD was also obtained from HSE. Bio Discs of Phormidium tenue showed better performance than Oscillatoria acuminata in removing chemicals from the synthetic effluents. Biomass developed within the reactor was harvested at every 15 days intervals from the secondary reactor and dried for biodiesel production.



Photobioreactor, cyanobacteria, phenol and sulphide removal, waste water treatment.

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