title: Removal of Anabaena flos-aquae in water treatment process using Moringa oleifera and assessment of fatty acid profile of generated sludge.
abstract: 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.
authors.affiliation: a Chemical Engineering Department , Universidade Estadual de Maringá - UEM , Maringá , Paraná , Brazil.
authors.forename: Livia O R
authors.initials: LO
authors.lastname: Moreti
authors.affiliation: a Chemical Engineering Department , Universidade Estadual de Maringá - UEM , Maringá , Paraná , Brazil.
authors.forename: Priscila Ferri
authors.initials: PF
authors.lastname: Coldebella
authors.affiliation: a Chemical Engineering Department , Universidade Estadual de Maringá - UEM , Maringá , Paraná , Brazil.
authors.forename: Franciele P
authors.initials: FP
authors.lastname: Camacho
authors.affiliation: b Institute of Agricultural and Environmental Sciences , Universidade Federal de Mato Grosso - UFMT , Sinop , Mato Grosso , Brazil.
authors.forename: Milene
authors.initials: M
authors.lastname: Carvalho Bongiovani
authors.affiliation: c Chemistry Department , Universidade Estadual de Maringá - UEM , Maringá , Paraná , Brazil.
authors.forename: Aloisio Henrique
authors.initials: AH
authors.lastname: Pereira de Souza
authors.affiliation: c Chemistry Department , Universidade Estadual de Maringá - UEM , Maringá , Paraná , Brazil.
authors.forename: Aline
authors.initials: A
authors.lastname: Kirie Gohara
authors.affiliation: c Chemistry Department , Universidade Estadual de Maringá - UEM , Maringá , Paraná , Brazil.
authors.forename: Makoto
authors.initials: M
authors.lastname: Matsushita
authors.affiliation: c Chemistry Department , Universidade Estadual de Maringá - UEM , Maringá , Paraná , Brazil.
authors.forename: Marcela
authors.initials: M
authors.lastname: Fernandes Silva
authors.affiliation: c Chemistry Department , Universidade Estadual de Maringá - UEM , Maringá , Paraná , Brazil.
authors.forename: Letícia
authors.initials: L
authors.lastname: Nishi
authors.affiliation: c Chemistry Department , Universidade Estadual de Maringá - UEM , Maringá , Paraná , Brazil.
authors.forename: Rosângela
authors.initials: R
authors.lastname: Bergamasco
mesh_terms: D019607:Brassicaceae / Q000737:chemistry*; D046869:Dolichospermum flos-aquae / Q000302:isolation & purification*; D005227:Fatty Acids / Q000032:analysis*; D005427:Flocculation; D019301:Oleic Acid / Q000032:analysis; D012639:Seeds / Q000737:chemistry*; D012722:Sewage / Q000032:analysis / Q000382:microbiology*; D014871:Water Microbiology; D018508:Water Purification / Q000379:methods*
chemical_list: D005227:Fatty Acids; D012722:Sewage; D019301:Oleic Acid
keywords: Cyanobacteria; Moringa oleifera; dissolved air flotation; fatty acids; sludge