Enhanced sulfonamides removal via microalgae-bacteria consortium via co-substrate supplementation. (August 2022)

• Record Type: Journal Article
• Authors: Wang, Yue; Li, Jinghua; Lei, Yao; Cui, Rong; Liang, Aiping; Li, Xiaoqiang; Kit Leong, Yoong; Chang, Jo-Shu
• Is Part Of: Bioresource technology. Volume 358(2022)
• Publication Date: 2022-08
• Subjects: Microalgae-bacteria consortium -- Co-substrate -- Refractory organic matter -- Sulfonamides -- Bacterial community diversity; 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.2022.127431
• Languages: English
• ISSNs: 0960-8524

Abstract

Graphical abstract: Highlights: Supply of co-substrate to algae-bacteria consortia enhances antibiotics degradation. Co-substrate improved SDZ degradation more significantly than SMX degradation. Co-substrate induced the secretion of microalgal EPS with high protein ratios. Supplementation of co-substrate could decrease peroxide damage to cells. The symbiotic bacterial diversities were analyzed by high throughput sequencing. Abstract: Both co-cultivation and co-substrate addition strategies have exhibited massive potential in microalgae-based antibiotic bioremediation. In this study, glucose and sodium acetate were employed as co-substrate in the cultivation of microalgae-bacteria consortium for enhanced sulfadiazine (SDZ) and sulfamethoxazole (SMX) removal. Glucose demonstrated a two-fold increase in biomass production with a maximum specific growth rate of 0.63 ± 0.01 d −1 compared with sodium acetate. The supplementation of co-substrate enhanced the degradation of SDZ significantly up to 703 ± 18% for sodium acetate and 290 ± 22% for glucose, but had almost no effect on SMX. The activities of antioxidant enzymes, including peroxidase, superoxide dismutase and catalase decreased with co-substrate supplementation. Chlorophyll a was associated with protection against sulfonamides and chlorophyll b might contribute to SDZ degradation. The addition of co-substrates influenced bacterial community structure greatly. Glucose enhanced the relative abundance of Proteobacteria, while sodium acetate improved the relative abundance of Bacteroidetes significantly.