Study of remediation efficiency and biomass production using cyanobacteria and microalgae in secondary treated tannery wastewater

Abstract Secondary treated tannery wastewater (STTWW) is high in COD with value ranges from 264 mg/L to 275 mg/L also, the total suspended solids value was 164. The total nitrogen calculated was 33.2 mg/L. Cyanobacteria and microalgae are efficient bioremediators as well as significant biomass producers with loads of bimolecular content such as carbohydrate, lipid, protein which can be used for the production of value added products(VAPs). Simple tubular photobioreactors were made for mass culturing both cyanobacteria and microalgae. Cyanobacteria had higher amount of protein (0.58 mg/L) at 100% STTWW at pH 7 and at light intensity of 1000 lumens, carbohydrate (1801.4 mg/L), chlorophyll (6.6303 mg/L) 100% STTWW at pH 7 and at light intensity of 1000 lumens. Lipid was higher at 40% STTWW when compared to microalgae the remediation efficiency of cyanobacteria was better than microalgae. Cyanobacteria reduced COD reduced upto 94 % Overall this study depicts that cyanobacteria is more efficient in bioremediation and biomass production.