Title | Sucralose biodegradation and enriched degrading consortia revealed by combining Illumina and Nanopore sequencing |
Authors | Huang, Yue Law, Japhet Cheuk-Fung Wang, Yulin Deng, Yu Liu, Lei Zhang, Yulin Ding, Jiahui Yang, Yu Leung, Kelvin Sze-Yin Zhang, Tong |
Affiliation | Univ Hong Kong, Dept Civil Engn, Environm Microbiome Engn & Biotechnol Lab, Pokfulam Rd, Hong Kong 999077, Peoples R China Hong Kong Baptist Univ, Dept Chem, Kowloon Tong, Hong Kong 999077, Peoples R China Peking Univ, Sch Environm & Energy, Shenzhen Grad Sch, Shenzhen 518055, Peoples R China Inst Chem Biol, Shenzhen Bay Lab, Shenzhen 518055, Peoples R China |
Keywords | ARTIFICIAL SWEETENER SUCRALOSE PRODUCTS GENOMES WATERS TOOL BAY |
Issue Date | 1-Apr-2023 |
Publisher | CHEMICAL ENGINEERING JOURNAL |
Abstract | Sucralose has been regarded as an emerging pollutant with growing concerns owing to its environmental persistence and potential risks to ecosystems and human health. However, limited information is currently available regarding its biodegradability and degradation pathway in the environment. In this study, complete and efficient sucralose biodegradation was achieved by enriched consortia seeded with activated sludge. In the enrichments with sucralose as the sole carbon source, 73 % of the total organic carbon was removed with a maximum degradation rate of 3.87 mg sucralose/g VSS center dot h(-1), coupling with the release of three chloride ions of sucralose. Additionally, five biotransformation products, namely TP-409N, TP-373N, TP-357N, TP-455N, and TP393N, were determined by UPLC-QTOF-MS, and an aerobic sucralose-degrading pathway was proposed. Then, Illumina and Nanopore sequencing were employed to provide a genome-centric resolution of microbial communities, demonstrating that the enriched consortia were dominated by Proteobacteria, Bacteroidota, Chloroflexota, and Planctomycetota. At the species level, over half of metagenome-assembled genomes were potentially affiliated with new lineages, implying that the function of sucralose biodegradation was driven by some novel species (at the genus level). Combined with the network analysis, species from UBA11579 and Polyangiaceae were suspected to be involved in the biodegradation of sucralose. This research evidenced the bacterial biodegradability of sucralose and first demonstrated the sucralose-biodegrading pathway and microbial communities, providing novel insights into sucralose biodegradation in the environment. |
URI | http://hdl.handle.net/20.500.11897/674134 |
ISSN | 1385-8947 |
DOI | 10.1016/j.cej.2023.141766 |
Indexed | EI SCI(E) |
Appears in Collections: | 环境与能源学院 |