eprintid: 2188 rev_number: 8 eprint_status: archive userid: 2 dir: disk0/00/00/21/88 datestamp: 2022-06-01 12:58:05 lastmod: 2022-06-01 12:58:06 status_changed: 2022-06-01 12:58:05 type: article metadata_visibility: show creators_name: Ruiz-Marin, Alejandro creators_name: Canedo-Lopez, Yunuen creators_name: Narvaez-Garcia, Asteria creators_name: Zavala Loría, José del Carmen creators_name: Dzul Lopez, Luis Alonso creators_name: Sámano Celorio, María Luisa creators_name: Crespo-Álvarez, Jorge creators_name: García Villena, Eduardo creators_name: Agudo-Toyos, Pablo creators_id: creators_id: creators_id: creators_id: jose.zavala@unini.edu.mx creators_id: luis.dzul@unini.edu.mx creators_id: marialuisa.samano@uneatlantico.es creators_id: jorge.crespo@uneatlantico.es creators_id: eduardo.garcia@uneatlantico.es creators_id: pablo.agudo@uenatlantico.es title: Harvesting Scenedesmus obliquus via Flocculation of Moringa oleifera Seed Extract from Urban Wastewater: Proposal for the Integrated Use of Oil and Flocculant ispublished: pub subjects: uneat_eng divisions: uneatlantico_produccion_cientifica divisions: uninimx_produccion_cientifica full_text_status: public keywords: coagulation-flocculation; harvest microalgal; Moringa oleifera; Scenedesmus obliquus; biodiesel quality abstract: The objectives this study were to examine the integrated use of oil–coagulant for the direct extraction of coagulant from Moringa oleifera (MO) with 5% and 10% (NH4)2SO4 extractor solution to harvest Scenedesmus obliquus cultivated in urban wastewater and to analyze the oil extracted from MO and S. obliquus. An average content of 0.47 g of coagulant and 0.5 g of oil per gram of MO was obtained. Highly efficient algal harvest, 80.33% and 72.13%, was achieved at a dose of 0.38 g L−1 and pH 8–9 for 5% and 10% extractor solutions, respectively. For values above pH 9, the harvest efficiency decreases, producing a whitish water with 10% (NH4)2SO4 solution. The oil profile (MO and S. obliquus) showed contents of SFA of 36.24–36.54%, monounsaturated fatty acids of 32.78–36.13%, and polyunsaturated fatty acids of 27.63–30.67%. The biodiesel obtained by S. obliquus and MO has poor cold flow properties, indicating possible applications limited to warm climates. For both biodiesels, good fuel ignition was observed according to the high cetane number and positive correlation with SFA and negative correlation with the degree of saturation. This supports the use of MO as a potentially harmless bioflocculant for microalgal harvest in wastewater, contributing to its treatment, and a possible source of low-cost biodiesel. date: 2019 publication: Energies volume: 12 number: 20 pagerange: 3996 id_number: doi:10.3390/en12203996 refereed: TRUE issn: 1996-1073 official_url: http://doi.org/10.3390/en12203996 access: open language: en citation: Artículo Materias > Ingeniería Universidad Europea del Atlántico > Investigación > Producción Científica Universidad Internacional Iberoamericana México > Investigación > Producción Científica Abierto Inglés The objectives this study were to examine the integrated use of oil–coagulant for the direct extraction of coagulant from Moringa oleifera (MO) with 5% and 10% (NH4)2SO4 extractor solution to harvest Scenedesmus obliquus cultivated in urban wastewater and to analyze the oil extracted from MO and S. obliquus. An average content of 0.47 g of coagulant and 0.5 g of oil per gram of MO was obtained. Highly efficient algal harvest, 80.33% and 72.13%, was achieved at a dose of 0.38 g L−1 and pH 8–9 for 5% and 10% extractor solutions, respectively. For values above pH 9, the harvest efficiency decreases, producing a whitish water with 10% (NH4)2SO4 solution. The oil profile (MO and S. obliquus) showed contents of SFA of 36.24–36.54%, monounsaturated fatty acids of 32.78–36.13%, and polyunsaturated fatty acids of 27.63–30.67%. The biodiesel obtained by S. obliquus and MO has poor cold flow properties, indicating possible applications limited to warm climates. For both biodiesels, good fuel ignition was observed according to the high cetane number and positive correlation with SFA and negative correlation with the degree of saturation. This supports the use of MO as a potentially harmless bioflocculant for microalgal harvest in wastewater, contributing to its treatment, and a possible source of low-cost biodiesel. metadata Ruiz-Marin, Alejandro; Canedo-Lopez, Yunuen; Narvaez-Garcia, Asteria; Zavala Loría, José del Carmen; Dzul Lopez, Luis Alonso; Sámano Celorio, María Luisa; Crespo-Álvarez, Jorge; García Villena, Eduardo y Agudo-Toyos, Pablo mail SIN ESPECIFICAR, SIN ESPECIFICAR, SIN ESPECIFICAR, jose.zavala@unini.edu.mx, luis.dzul@unini.edu.mx, marialuisa.samano@uneatlantico.es, jorge.crespo@uneatlantico.es, eduardo.garcia@uneatlantico.es, pablo.agudo@uenatlantico.es (2019) Harvesting Scenedesmus obliquus via Flocculation of Moringa oleifera Seed Extract from Urban Wastewater: Proposal for the Integrated Use of Oil and Flocculant. Energies, 12 (20). p. 3996. ISSN 1996-1073 document_url: http://repositorio.uneatlantico.es/id/eprint/2188/1/energies-12-03996.pdf