Microalgal post-treatment of anaerobically digested agro-industrial wastes for nutrient removal and lipids production. (January 2017)

• Record Type: Journal Article
• Authors: Koutra, Eleni; Grammatikopoulos, George; Kornaros, Michael
• Is Part Of: Bioresource technology. Volume 224(2017)
• Page Start: 473
• Page End: 480
• Publication Date: 2017-01
• Subjects: Parachlorella kessleri -- Microalgae -- Anaerobic digestion effluent -- Photosynthetic apparatus -- Lipids; Biomass -- Periodicals; Biomass energy -- Periodicals; Bioremediation -- Periodicals; Agricultural wastes -- Periodicals; Factory and trade waste -- Periodicals; Organic wastes -- Periodicals; Bioénergie -- Périodiques; Déchets agricoles -- Périodiques; Déchets industriels -- Périodiques; Déchets organiques -- Périodiques; Déchets (Combustible) -- Périodiques; 662.88
• DOI: 10.1016/j.biortech.2016.11.022
• Languages: English
• ISSNs: 0960-8524

Abstract

Highlights: P. kessleri outperformed A. obliquus in 10% ADE. 10% (v/v) ADE loading inhibited microalgal growth for 9–12 days. Non-sterilized ADE is the preferred condition examined. % TP removal and % NH3 -N assimilation varied between 84–94.5% and 7.87–72.7%. C18:0, C18:3n3 and C18:1n9t were the most abundant fatty acids detected. 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 9–12 days of cultivation, however biomass yields of 1.1 and 1 g L −1, 22.7% and 19.5% (w/w) fatty acids concentration, as well as NH3 -N assimilation of 49.7 mg L −1 and 32.3 mg L −1 and 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.