期刊
ENVIRONMENTAL TECHNOLOGY
卷 37, 期 11, 页码 1408-1417出版社
TAYLOR & FRANCIS LTD
DOI: 10.1080/09593330.2015.1117144
关键词
fatty acids; Moringa oleifera; Cyanobacteria; sludge; dissolved air flotation
资金
- CNPQ (National Counset of Technological and Scientific Development)
- CAPES (Coordination for the Improvement of Higher Education Personnel)
- Araucaria Foundation
- FINEP
This study aimed to evaluate the efficiency of the coagulation/flocculation/dissolved air flotation (C/F/DAF) process using the coagulant Moringa oleifera (MO) seed powder, and to analyse the profile of fatty acids present in the generated sludge after treatment. For the tests, deionized water artificially contaminated with cell cultures of Anabaena flos-aquae was used, with a cell density in the order of 10(4) cells mL(-1). C/F/DAF tests were conducted using 'Flotest' equipment. For fatty acid profile analyses, a gas chromatograph equipped with a flame ionization detector was used. It was seen that the optimal dosage (100 mg L-1) of MO used in the C/F/DAF process was efficient at removing nearly all A. flos-aquae cells (96.4%). The sludge obtained after treatment contained oleic acid (61.7%) and palmitic acid (10.8%). Thus, a water treatment process using C/F/DAF linked to integral MO powder seed was found to be efficient in removing cells of cyanobacteria, and produced a sludge rich in oleic acid that is a precursor favourable for obtaining quality biodiesel, thus becoming an alternative application for the recycling of such biomass.
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