Long-term effects of food waste on erosion resistance and production of methane and sulfide in sewer sediments: New insights into extracellular polymeric substances and genetic response mechanisms.

 0 Người đánh giá. Xếp hạng trung bình 0

Tác giả: Duanxin Li, Huaizheng Li, Zhenzhen Tang, Haijing Xiao, Haolian Xu, Ziqi Zhao, Ruilin Zhu

Ngôn ngữ: eng

Ký hiệu phân loại:

Thông tin xuất bản: England : Journal of environmental management , 2025

Mô tả vật lý:

Bộ sưu tập: NCBI

ID: 733734

Discharge of food waste (FW) into sewer systems causes environmental issues, such as sewer blockage and odour problems. This study investigated the long-term effects of FW addition on sediment properties, microbial communities, and metabolic pathways using laboratory-scale reactors for 160-day incubation. The addition of 2 g/L FW increased the critical erosion shear stress of sediments by 40.63% and reduced their self-cleaning capacity by 39.46%. This was attributed to the fact that FW discharge increased extracellular polymeric substances (EPS) in sediments by 82.94%, especially aromatic protein with high hydrophobicity and high content of intermolecular hydrogen bonds, which was supported by the increased genes encoding aminoacyl-tRNA biosynthesis. The denser biofilm on the sediment surface hindered oxygen transfer to deeper sediment zones, and lowered oxidation-reduction potential below -400 mV. Microbial and metagenomic analysis revealed an enrichment of methanogenic archaea (e.g., Methanothrix) and sulfate-reducing bacteria (e.g., Desulforhabdus), along with increased genes for dissimilatory sulfate reduction and methanogenesis pathways of acetate and CO
Tạo bộ sưu tập với mã QR

THƯ VIỆN - TRƯỜNG ĐẠI HỌC CÔNG NGHỆ TP.HCM

ĐT: (028) 36225755 | Email: tt.thuvien@hutech.edu.vn

Copyright @2024 THƯ VIỆN HUTECH