Microalgal interstrains differences in algal-bacterial biofloc formation during liquid digestate treatment. (October 2019)

• Record Type: Journal Article
• Authors: Wang, Hong; Qi, Bufan; Jiang, Xiaomei; Jiang, Yiqi; Yang, Han; Xiao, Youqian; Jiang, Na; Deng, Liangwei; Wang, Wenguo
• Is Part Of: Bioresource technology. Volume 289(2019)
• Publication Date: 2019-10
• Subjects: Microalgal strains -- Biofloc -- Chlorella -- Liquid digestate -- Extracellular polymeric substances (EPS); 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.2019.121741
• Languages: English
• ISSNs: 0960-8524

Abstract

Graphical abstract: Highlights: Microalgal strains had a great effect on algal-bacterial biofloc formation. The six microalgal strains resulted in three cases of algal-bacterial biofloc formation. Chlorella sp. BWY-1was the best strain. Acid polysaccharides and proteins were present in EPS of algal-bacterial biofloc. Abstract: In this study, the effect of microalgal strains on the formation of algal-bacterial biofloc was investigated in liquid digestate pretreated by a sequencing batch reactor (SBR), which loaded much aerobic bacteria from activated sludge. Six microalgal strains resulted in three cases: no-bioflocculation ( Scenedesmus obliquus and Botryococcus braunii ), optimal-bioflocculation with high flocculation activity and good growth ( Chlorella sp. BWY-1, Haematococcus pluvialis and Dictyosphaerium ehnenbergianum ) and over-bioflocculation with high flocculation activity and bad growth ( Chlorella vulgaris ). Chlorella sp. BWY-1 provided a better level of flocculation activity and growth. Polysaccharides and proteins were present in EPS of algal-bacterial biofloc, and their distribution was confirmed by staining with alcian blue and fluorescein isothiocyanate (FITC).