title: Feasibility of using brewery wastewater for biodiesel production and nutrient removal by Scenedesmus dimorphus.
abstract: This work investigates the potential use of a brewery wastewater as a medium for the cultivation of the oleaginous species Scenedesmus dimorphus with the double aim of removing nutrients and to produce biomass as feedstock for biodiesel. For this purpose, effects of nitrogen (61.8-247 mg L(-1)), phosphorous (1.4-5.5 mg L(-1)), and iron (1.5-6 mg L(-1)) concentrations on growth, nutrients uptake, lipid accumulation, and fatty acids profile of this microalga were investigated. Results showed that brewery wastewater can be used as a culture medium even if nitrogen and phosphorous concentrations should have been modified to improve both biomass (6.82 g L(-1)) and lipid accumulation (44.26%). The analysis revealed a C16-C18 composition of 93.47% fatty acids methyl esters with a relative high portion of unsaturated ones (67.24%). High removal efficiency (>99%) for total nitrogen and total phosphorous and a reduction of up to 65% in chemical oxygen demand were achieved, respectively. The final microalgae biomass, considering its high lipid content as well as its compliance with the standards for the quality of biodiesel, and considering also the high removal efficiencies obtained for macronutrients and organic carbon, makes the brewery wastewater a viable option as a priceless medium for the cultivation of microalgae.
authors.affiliation: a Key Laboratory of Biofuel , Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Science , Qingdao , People's Republic of China.
authors.forename: Giovanni Antonio
authors.initials: GA
authors.lastname: Lutzu
authors.affiliation: a Key Laboratory of Biofuel , Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Science , Qingdao , People's Republic of China.
authors.forename: Wei
authors.initials: W
authors.lastname: Zhang
authors.affiliation: a Key Laboratory of Biofuel , Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Science , Qingdao , People's Republic of China.
authors.forename: Tianzhong
authors.initials: T
authors.lastname: Liu
mesh_terms: D001515:Beer; D056804:Biofuels; D057919:Biological Oxygen Demand Analysis; D019149:Bioreactors / Q000382:microbiology*; D005240:Feasibility Studies; D019649:Food Industry; D007220:Industrial Waste; D044444:Scenedesmus / Q000378:metabolism*; D062065:Wastewater / Q000737:chemistry*
chemical_list: D056804:Biofuels; D007220:Industrial Waste; D062065:Wastewater
keywords: COD removal; Scenedesmus dimorphus; brewery wastewater; fatty acids methyl esters; nutrients uptake