The potential application of Chlorella vulgaris UMACC 001 for bioremediation of textile wastewater (TW)
was investigated using four batches of cultures in high rate algae ponds (HRAP) containing textile dye
(Supranol Red 3BW) or TW. The biomass attained ranged from 0.17 to 2.26 mg chlorophyll a/L while colour
removal ranged from 41.8% to 50.0%. There was also reduction of NH4–N (44.4–45.1%), PO4–P (33.1–
33.3%) and COD (38.3–62.3%) in the TW. Supplementation of the TW with nutrients of Bold’s Basal Medium
(BBM) increased biomass production but did not improve colour removal or reduction of pollutants.
The mechanism of colour removal by C. vulgaris is biosorption, in accordance with both the Langmuir and
Freundlich models. The HRAP using C. vulgaris offers a good system for the polishing of TW before final
discharge.