Biomass production of carbohydrate-rich filamentous microalgae coupled with treatment and nutrients recovery from acrylonitrile butadiene styrene based wastewater: Synergistic enhancement with low carbon dioxide supply strategy. (April 2022)

• Record Type: Journal Article
• Authors: Zheng, Hongjing; Chen, Jing; Hu, Xinjuan; Zhu, Feifei; Ali Kubar, Ameer; Zan, Xinyi; Cui, Yi; Zhang, Cunsheng; Huo, Shuhao
• Is Part Of: Bioresource technology. Volume 349(2022)
• Publication Date: 2022-04
• Subjects: Tribonema sp. -- CO2 bioremediation -- Synergistic effect -- Acetophenone -- Acrylonitrile -- Nutrient recovery; 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.2022.126829
• Languages: English
• ISSNs: 0960-8524

Abstract

Graphical abstract: Highlights: Acetophenone and acrylonitrile could be removed by the filamentous microalgae system. CO2 addition significantly increased algal biomass production and pollutants removal. Carbohydrate and oil were main accumulations, and their contents can account for 70%. CO2 benefited phosphorus release and reduced its removal rate per unit algal biomass. Abstract: This study attempted to remove acrylonitrile and acetophenone from simulated acrylonitrile butadiene styrene (ABS) based wastewater while recovering nitrogen and phosphorus using the carbohydrate-rich filamentous microalgae Tribonema sp.. Results showed that typical acetophenone and acrylonitrile presented significant inhibitory effect on Tribonema sp. growth and co-metabolism of CO2 improved the tolerance of Tribonema sp. to toxic pollutants. The microalgae biomass increased by 34.47% (3.16 g/L) and 58.17% (3.97 g/L) via supplementing 2% CO2 in the 100 mg/L acrylonitrile and acetophenone groups, respectively. The filamentous microalga was rich in carbohydrates and its productivity was further enhanced by 32.52% and 70.34%, respectively, in 100 mg/L acrylonitrile and acetophenone groups with 2% CO2 supplement. The synergistic CO2 supply strategy effectively enhanced the biomass production of filamentous microalgae, and moreover, improved the treatment efficiency of ABS based wastewater simulated by acetophenone or acrylonitrile addition, while at same time enhanced the recovery of nitrogen and phosphorus nutrients.