title: Pellets valorization of waste biomass harvested by coagulation of freshwater algae.
abstract: There is a comparison of different coagulants: calcium chloride (20, 60, 120 and 180 mg/L); sodium alginate (10 and 20 mg/L) and tannins of Eucalyptus globulus bark (10 and 20 mg/L) in order to make the most of each method. The results show that 20 mg/L of tannin achieved a recovery efficiency of 95.35±1.16, sodium alginate 90.49±0.53 and 84.04±2.29 for calcium chloride. Taking into account the economic side of the coagulants, obtaining tannins is a profitable process. Bark is waste biomass obtained in the forestry process; therefore it does not involve extra costs. Finally, the feasibility of making pellets from harvested algae was studied, and the results suggest that waste biomass pellets may be used as fuel in boilers in a mixture <54% with other waste sources as Eucalyptus g. branches.
authors.affiliation: Chemical Engineering Department, Industrial Engineering College, University of Vigo, Campus Lagoas-Marcosende s/n, 36310 Vigo-Pontevedra, Spain.
authors.forename: Ángeles
authors.initials: Á
authors.lastname: Cancela
authors.affiliation: Chemical Engineering Department, Industrial Engineering College, University of Vigo, Campus Lagoas-Marcosende s/n, 36310 Vigo-Pontevedra, Spain.
authors.forename: Ángel
authors.initials: Á
authors.lastname: Sánchez
authors.affiliation: Department of Natural Resources and Environment Engineering, E E. Forestal, University of Vigo, Campus A Xunqueira s/n., 36005 Pontevedra, Spain. Electronic address: giaf4_5@uvigo.es.
authors.forename: Xana
authors.initials: X
authors.lastname: Álvarez
authors.affiliation: E E. Forestal, University of Vigo, Campus A Xunqueira s/n., 36005 Pontevedra, Spain.
authors.forename: Alejandro
authors.initials: A
authors.lastname: Jiménez
authors.affiliation: Department of Natural Resources and Environment Engineering, E E. Forestal, University of Vigo, Campus A Xunqueira s/n., 36005 Pontevedra, Spain.
authors.forename: Luis
authors.initials: L
authors.lastname: Ortiz
authors.affiliation: Department of Natural Resources and Environment Engineering, E E. Forestal, University of Vigo, Campus A Xunqueira s/n., 36005 Pontevedra, Spain.
authors.forename: Enrique
authors.initials: E
authors.lastname: Valero
authors.affiliation: E E. Forestal, University of Vigo, Campus A Xunqueira s/n., 36005 Pontevedra, Spain.
authors.forename: Paloma
authors.initials: P
authors.lastname: Varela
mesh_terms: D000464:Alginates / Q000737:chemistry; D018533:Biomass; D002122:Calcium Chloride / Q000737:chemistry; D005052:Eucalyptus / Q000737:chemistry*; D005618:Fresh Water / Q000382:microbiology; D020723:Glucuronic Acid / Q000737:chemistry; D006603:Hexuronic Acids / Q000737:chemistry; D046931:Microcystis / Q000254:growth & development*; D044444:Scenedesmus / Q000254:growth & development*; D013634:Tannins
chemical_list: D000464:Alginates; D006603:Hexuronic Acids; D013634:Tannins; D020723:Glucuronic Acid; D002122:Calcium Chloride
keywords: Eucalyptus globulus; Freshwater algae; Pellet; Renewable energy; Tannins