In vitro testing of the efficiency of chlorella vulgaris in the removal of organic load in contaminated water using different light source conditions

Abstract

The present study aimed to use Chlorella vulgaris as a biological alternative to remove organic load present in stream and bog water. For this purpose, bioaugmentation of Chlorella vulgaris and in vitro evaluation of organic load in stream and swamp water was carried out using Chlorella vulgaris biomass subjected to different light sources. The results obtained after the evaluation of the organic load of the samples analyzed (marsh and stream water), show that the treatment (T2) with Chlorella vulgaris using artificial light source presented a percentage of organic load removal represented in BOD5 of 56.5% of the marsh water. Meanwhile, for the stream water sample test, it was observed that the maximum percentage of removal for the treatment (T6), where Chlorella vulagaris was used in dark growth. This test demonstrates the capacity of Chlorella vulagaris after 10 days to remove organic load in the form of BOD5, which shows the capacity of microalgae to carry out photosynthesis and position themselves as primary producers in the trophic chains, becoming an ideal organism to remove organic pollutants from wastewater.