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  • Aillah Baluch
  • Rahat Batool
  • Arshia Amin


Algae, water treatment, chemical oxygen demand, total phosphate, absorbance


Waste water treatment by the use of non-micro algal or physiochemical methods often result in being exhaustive and inefficient ways. Microalgae have the ability to take up nutrients while thriving in water bodies. Phosphorous, nitrogen and other trace elements are present in waste water which the algae need for their growth. Algae which was obtained from waste water was inoculated in waste and river water for a period of 14 days as testing for chemical oxygen demand and total phosphate was carried out on a weekly basis along with the observance of absorbance by the use of a spectrophotometer. A decrease in the content of total phosphate and chemical oxygen demand was observed. The average efficacy of COD reduction was 60% for waste water and 77.2% for river water and the average efficacy of total phosphate reduction was 87% for waste water and 13% for river water. Similarly a decrease in absorbance and increase in transmittance was observed in both water samples. The average efficacy of absorbance reduction was almost 100% for both samples. But due to the sudden increase in concentrations it was revealed that due to the lack of aeration and a carbon source, the algae had died and started to decompose. This study demonstrates that algal treatments are achievable as an eco-friendly alternative and that algal bioremediation could be incorporated with other methods of treatment or adopted as the single method for the treatment of wastewater.


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How to Cite

Baluch, A., Batool, R. ., & Amin, A. (2024). ESTIMATION OF IMPACT OF CHLORELLA VULGARIS ON CHEMICAL OXYGEN DEMAND (COD) AND TOTAL PHOSPHATE (TP) IN WASTE AND RIVER WATER. Journal of Applied Biological Sciences, 18(1), 55–63. Retrieved from