title: Microalgal post-treatment of anaerobically digested agro-industrial wastes for nutrient removal and lipids production.
abstract: The aim of this study was to investigate the effectiveness of cultivating Parachlorella kessleri and Acutodesmus obliquus, in anaerobic digestion effluent (ADE) derived from the co-digestion of end-of-life dairy products with mixtures of agro-industrial wastes. To this end, their performance under sterile and non-sterile conditions and different ADE loadings was evaluated, in terms of biomass and lipid production, nutrient removal efficiency and vitality of the photosynthetic apparatus. 10% (v/v) ADE loading inhibited growth over 9-12days of cultivation, however biomass yields of 1.1 and 1gL-1, 22.7% and 19.5% (w/w) fatty acids concentration, as well as NH3-N assimilation of 49.7mgL-1and 32.3mgL-1and TP removal of 84.2% and 84% were recorded for P. kessleri and A. obliquus, respectively. Among all the ADE-based treatments tested, P. kessleri outperformed A. obliquus, with no differences observed between sterilized and non-sterilized ADE.
authors.affiliation: Laboratory of Biochemical Engineering & Environmental Technology (LBEET), Department of Chemical Engineering, University of Patras, 26504 Patras, Greece.
authors.forename: Eleni
authors.initials: E
authors.lastname: Koutra
authors.affiliation: Laboratory of Plant Physiology, Department of Biology, University of Patras, 26504 Patras, Greece.
authors.forename: George
authors.initials: G
authors.lastname: Grammatikopoulos
authors.affiliation: Laboratory of Biochemical Engineering & Environmental Technology (LBEET), Department of Chemical Engineering, University of Patras, 26504 Patras, Greece. Electronic address: kornaros@chemeng.upatras.gr.
authors.forename: Michael
authors.initials: M
authors.lastname: Kornaros
mesh_terms: D000693:Anaerobiosis; D018533:Biomass; D019149:Bioreactors; D000460:Chlorophyta / Q000254:growth & development / Q000378:metabolism*; D005227:Fatty Acids; D007220:Industrial Waste; D008055:Lipids / Q000096:biosynthesis*; D058086:Microalgae / Q000254:growth & development / Q000378:metabolism*; D010788:Photosynthesis; D062065:Wastewater / Q000737:chemistry / Q000382:microbiology
chemical_list: D005227:Fatty Acids; D007220:Industrial Waste; D008055:Lipids; D062065:Wastewater
keywords: Anaerobic digestion effluent; Lipids; Microalgae; Parachlorella kessleri; Photosynthetic apparatus