APPLICATION OF COAGULANT BASED ON FREEZE-DRIED EXTRACT OF MORINGA OLEIFERA SEEDS
DOI:
https://doi.org/10.13083/reveng.v29i1.10210Keywords:
Natural coagulant, Dosage, Drying, SeedsAbstract
Despite the proven performance and cost-effectiveness of chemical coagulants, natural coagulants are being studied, among them Moringa oleifera has been investigated more intensively, as it contains proteins that are efficient in the alternative treatment of water for human consumption. The objective of the research was to use water with pH, turbidity and apparent color at levels above those allowed by Brazilian legislation and to treat it with freeze-dried powder of moringa seeds in different dosages, selecting the best one for each parameter studied. The work was conducted in the Laboratory of Processing and Storage of Agricultural Products, Federal University of Campina Grande, Campina Grande, Brazil. The powder was obtained by freeze-drying method. Three water quality parameters were evaluated: pH, turbidity and apparent color. The maximum values allowed were those established by decree number 5 of the Ministry of Health. The dosages of 12, 16, 18 and 24 g of the coagulant obtained from freeze-dried extract of moringa seeds were used. The tests were performed in Jar Test, at a rotation of 160 rpm. The application of different dosages of freeze-dried extract resulted in a pH according to the limits required by Brazilian legislation for drinking water, with the dosage of 24 g being the lowest. This resulted in a greater reduction in the level of turbidity (60.66%) and that of 16 g showed greater efficiency in removing the apparent color from the water (61.33%). Based on the best efficiencies in pH, turbidity and color reduction, the dosages of 24 g for pH and turbidity and 16 g for apparent color were selected.
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