Journal
CHEMICAL ENGINEERING JOURNAL
Volume 304, Issue -, Pages 469-475Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.cej.2016.06.101
Keywords
Water treatment; Dissolved air flotation; Coagulation; Natural coagulant; Protein extraction
Categories
Funding
- Conselho Nacional de Desenvolvimento Cientifico e Tecnologico (National Council of Scientific and Technology Development - CNPq)
Ask authors/readers for more resources
The Moringa oleifera seed coagulant provides high efficiency for water treatment, especially for bacteria removal and potentially cyanobacteria. The present study evaluates the difference between two saline extracts of M. oleifera Lam seeds in the removal of Microcystis aeruginosa cells, using dissolved air flotation (DAF). Samples were generated by synthetic water spiked with humic acid and M. aeruginosa cells to obtain 25 NTU. The saline extracts were obtained by seed extraction using 1 M NaCl or CaCl2, and dosages from 25 to 200 mg L-1 were applied from each of the extractions. The CaCl2 coagulant extract showed a better efficiency, achieving 78.9% cell removal when applying a dosage of 50 mg L-1. Comparison of saline extractions and aqueous extraction suggested that calcium ions participate in coagulation/flocculation process, as a response of its double-valency. The CaCl2 extract of the M. oleifera seeds is indicated for the treatment of water with the presence of cyanobacteria, even in water with low turbidity, a condition not commonly evaluated in other studies. (C) 2016 Elsevier B.V. All rights reserved.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available