Abstract
Laboratory experiments were performed to study the removal of dye from textile effluent using the seagrass Cymodocea rotunda beads in calcium alginate. The present experiment was conducted to know the effects of pH, beads density, retention time and biomass dosage in beads on dye removal from textile effluent. Algal uptake and adsorption on alginate gels were the major principals involved in the removal of nitrate and phosphate from effluent. Increasing cell stocking in beads did not cause any improvement in the efficiency of treatment, but caused some leakage problems. Also, the increased beads concentration in effluent caused reductions in light penetration and enhanced self-shading effects besides the beads settled at the bottom of the reactor. The experiment inferred that the 75 numbers of algal beads with pH 8 in the biomass dosage of 0.1 g and 120 minutes retention time were found to be suitable factors for the effective removal of dye from the textile effluent.
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