A novel biotechnology based on periphytic biofilms with N-acyl-homoserine-lactones stimulation and lanthanum loading for phosphorus recovery

Xu, Ying, Kerr, Philip G., Dolfing, Jan, Rittmann, Bruce E. and Wu, Yonghong (2021) A novel biotechnology based on periphytic biofilms with N-acyl-homoserine-lactones stimulation and lanthanum loading for phosphorus recovery. Bioresource Technology. p. 126421. ISSN 0960-8524 (In Press)

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Official URL: https://doi.org/10.1016/j.biortech.2021.126421

Abstract

This study presents an approach for developing periphytic biofilm with N-acyl-homoserine-lactones (AHLs) stimulation and lanthanum (La, a rare earth element) loading, to achieve highly efficient and stable phosphorus (P) recovery from wastewater. AHLs stimulated biofilm growth and formation, also improved stable P entrapment by enhancing extracellular polymeric substance (EPS) production and optimizing P-entrapment bacterial communities. Periphytic biofilms loading La is based on ligand exchanges, and La loading achieved initial rapid P entrapment by surface adsorption. The combination of AHLs stimulation and La loading achieved 99.0% P entrapment. Interestingly, the enhanced EPS production stimulated by AHLs protected biofilms against La. Moreover, a method for P and La separately recovery from biofilms was developed, achieving 89-96% of P and 88-93% of La recovery. This study offers a promising biotechnology to reuse La from La-rich wastewater and recover P by biofilm doped with La, which results in a win-win situation for resource sustainability.

Item Type: Article
Additional Information: Funding information: This work was supported by the National Natural Science Foundation of China (41825021, 41961144010 and 31772396), the Original Inno-vation Project of Chinese Academy of Sciences (ZDBS-LY-DQC024), and the Natural Science Foundation of Jiangsu Province, China (BZ2019015 and BE2020731).
Uncontrolled Keywords: Phosphorus recovery, Periphytic biofilm, N-acyl-homoserine-lactones, Lanthanum loading
Subjects: F200 Materials Science
H800 Chemical, Process and Energy Engineering
Department: Faculties > Engineering and Environment > Mechanical and Construction Engineering
Depositing User: John Coen
Date Deposited: 13 Dec 2021 15:14
Last Modified: 13 Dec 2021 15:15
URI: http://nrl.northumbria.ac.uk/id/eprint/47973

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