Use ofMoringa oleiferaseeds powder as bio-coagulants for the surface water treatment

The research aims to evaluate the effectiveness of surface water treatment by usingMoringa oleiferaseeds by-products as bio-coagulant to remove turbidity and natural organic matter. This approach brings more benefits as compared to others, particularly, no chemical use, low cost, easy to implement but equivalent efficiency and also safe for the health. The surface water samples were collected from three sites in the Dong Nai River, Vietnam, with the average concentrations of pH, turbidity, chemical oxygen demand (COD) and total Kjeldahl nitrogen (TKN) ranging from 6.2 +/- 0.3 to 6.7 +/- 0.2, 25.2 +/- 2.5 to 41.7 +/- 7.9 NTU, 22.4 +/- 6.4 to 41.1 +/- 5.9 mg L(-1)and 0.70 +/- 0.20 to 1.08 +/- 0.15 mg L-1, respectively. The study has found that the optimum bio-coagulant dosage was 0.15 ml L(-1)for the water samples in both rainy and dry seasons. In the rainy season, the turbidity removal efficiencies in Tan Luong Ferry, Nguyen Van Tri Park and Hoi Son Ferry ranged from 87.8 +/- 2.9 to 93.3 +/- 1.0%, while the tendency for dry season was obtained from 85.7 +/- 2.5 to 94.3 +/- 1.1%, respectively. The treated turbidity concentration met the Vietnam's National Technical Regulation on domestic water quality. Furthermore, the pairedttests used to compare the pre-treatment and post-treatment dataset for COD and turbidity removal efficiencies were significant (p < 0.05) in three studied sites. Results indicated thatMoringa oleiferaextract is a promising material which is environmental-friendly and low cost to treat the surface water.

Automated summary

The research evaluates the effectiveness of using Moringa oleifera seeds by-products as bio-coagulant in surface water treatment to remove turbidity and organic matter, which proves to be environmentally-friendly, cost-effective, and safe for health. The study conducted in Vietnam demonstrates that Moringa oleifera extract can efficiently reduce turbidity in surface water during both rainy and dry seasons, meeting national water quality standards. The results of the experiment show significant improvements in COD and turbidity removal efficiencies, confirming the promising potential of Moringa oleifera extract as an alternative for surface water treatment.