Evaluation of the potential of Chlorella vulgaris for the removal of pollutants from standing water
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In this study we evaluated the microalga Chlorella vulgaris in order to determine the ability of the microalga to remove the highest concentration of contaminants present in stagnant water. A mixing design of the microalgae with the wastewater was carried out for 20 days, with a 12:12 h photoperiod, in a greenhouse. The highest removal efficiencies for heavy metals were ≥ 98% (mainly Cd, Hg, As and Pb) and ≥ 90% for BOD5, COD, nitrates, phosphates, total phosphorus, faecal and total coliforms. Finally, according to the design analysis, it was determined that the optimal microalgae mixture 1:10 achieves the highest DO production and the highest removal, in a cultivation time of 15 days. In conclusion, microalgae demonstrate their capacity for bioremediation of rural domestic wastewater jagüeyes.
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