Lignocellulosic residue as bio-carrier for algal biofilm growth: Effects of carrier physicochemical proprieties and toxicity on algal biomass production and composition. (December 2019)

• Record Type: Journal Article
• Authors: Zhang, Qi; Yu, Zhigang; Jin, Shiping; Zhu, Liandong; Liu, Cuixia; Zheng, Hongli; Zhou, Ting; Liu, Yuhuan; Ruan, Roger
• Is Part Of: Bioresource technology. Volume 293(2019)
• Publication Date: 2019-12
• Subjects: Algal biofilm -- Bio-carrier -- Surface roughness -- Leaching -- Carrier toxicity; 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.2019.122091
• Languages: English
• ISSNs: 0960-8524

Abstract

Graphical abstract: Highlights: Lignocellulosic residues were used as bio-carriers for algal biofilm growth. Rougher and hydrophilic bio-carrier yielded more algal biomass. Pine sawdust was the optimal carrier for biomass production (9.61 g·m −2 ·day −1 ). Bio-carriers were leached by medium and their energy conversion were promoted. The leached chemicals could affect the cell growth and biomass composition. Abstract: Five types of lignocellulosic materials were applied as the bio-carriers for low-cost algal biofilm cultivation of three algal strains. The effects of bio-carrier physicochemical properties and toxicity on algal cells growth and attachment were investigated. Rougher and hydrophilic bio-carrier could yield more algal biomass than smoother and hydrophobic bio-carrier. Pine sawdust (diameter: 0.420–0.595 mm) performed the best when cultured Diplosphaera sp. (9.61 g·m −2 ·day −1 ) biofilm. Meanwhile, bio-carriers could be leached by the culture medium during cultivation, and their energy conversion proprieties could be improved due to the reduced ash contents and the decreased crystallinities. In addition, Chlorella vulgaris growth tests indicated that pine sawdust (15.45%) leachate promoted cell growth, whereas rick husk (15.48%) and sugarcane bagasse (13.19%) leachate inhibited cell growth. And bio-carriers leachates also modified the chemical compositions (lipid, protein and carbohydrate) of algal cells and increased the corresponding saturated fatty acids methyl ester content (from 48.71 to 55.58–57.08%).