title: Characterization of Nizimuddinia zanardini macroalgae biomass composition and its potential for biofuel production.
abstract: Nizimuddinia zanardini macroalgae, harvested from Persian Gulf, was chemically characterized and employed for the production of ethanol, seaweed extract, alginic acid, and biogas. In order to improve the products yields, the biomass was pretreated with dilute sulfuric acid and hot water. The pretreated and untreated biomasses were subjected to enzymatic hydrolysis by cellulase (15FPU/g) and β-glucosidase (30IU/g). Hydrolysis yield of glucan was 29.8, 82.5, and 72.7g/kg for the untreated, hot-water pretreated, and acid pretreated biomass, respectively. Anaerobic fermentation of hydrolysates by Saccharomycescerevisiae resulted in the maximum ethanol yield of 34.6g/kg of the dried biomass. A seaweed extract containing mannitol and a solid residue containing alginic acid were recovered as the main byproducts of the ethanol production. On the other hand, the biogas yield from the biomass was increased from 170 to 200m(3) per ton of dried algae biomass by hot water pretreatment.
authors.affiliation: Department of Chemical Engineering, Isfahan University of Technology, Isfahan 84156-83111, Iran.
authors.forename: Parviz
authors.initials: P
authors.lastname: Yazdani
authors.affiliation: Department of Chemical Engineering, Isfahan University of Technology, Isfahan 84156-83111, Iran; Swedish Centre for Resource Recovery, University of Borås, 50190 Borås, Sweden. Electronic address: zamani.akram@cc.iut.ac.ir.
authors.forename: Akram
authors.initials: A
authors.lastname: Zamani
authors.affiliation: Department of Chemical Engineering, Isfahan University of Technology, Isfahan 84156-83111, Iran; Industrial Biotechnology Group, Institute of Biotechnology and Bioengineering, Isfahan University of Technology, Isfahan 84156-83111, Iran.
authors.forename: Keikhosro
authors.initials: K
authors.lastname: Karimi
authors.affiliation: Swedish Centre for Resource Recovery, University of Borås, 50190 Borås, Sweden.
authors.forename: Mohammad J
authors.initials: MJ
authors.lastname: Taherzadeh
mesh_terms: D000464:Alginates / Q000378:metabolism; D000693:Anaerobiosis; D056804:Biofuels; D018533:Biomass; D000431:Ethanol / Q000378:metabolism*; D005285:Fermentation; D020723:Glucuronic Acid / Q000378:metabolism; D006603:Hexuronic Acids / Q000378:metabolism; D010936:Plant Extracts / Q000378:metabolism; D012441:Saccharomyces cerevisiae / Q000378:metabolism; D012624:Seaweed / Q000737:chemistry / Q000378:metabolism*
chemical_list: D000464:Alginates; D056804:Biofuels; D006603:Hexuronic Acids; D010936:Plant Extracts; D000431:Ethanol; D020723:Glucuronic Acid
keywords: Alginic acid; Biogas; Ethanol; Macroalgae; Mannitol