Sulfate-reduction behavior in waste-leachate transition zones of landfill sites

Wenyi Yang; Manting Ci; Lifang Hu; Zhen Shen; Chengran Fang; Yuyang Long

doi:10.1016/j.jhazmat.2021.128199

Sulfate-reduction behavior in waste-leachate transition zones of landfill sites

J Hazard Mater. 2022 Apr 15:428:128199. doi: 10.1016/j.jhazmat.2021.128199. Epub 2022 Jan 3.

Authors

Wenyi Yang¹, Manting Ci¹, Lifang Hu², Zhen Shen³, Chengran Fang⁴, Yuyang Long⁵

Affiliations

¹ Zhejiang Provincial Key Laboratory of Solid Waste Treatment and Recycling, School of Environmental Science and Enginee ring, Zhejiang Gongshang University, Hangzhou 310012, China.
² College of Quality and Safety Engineering, Institution of Industrial Carbon Metrology, China Jiliang University, Hangzhou 310018, China. Electronic address: lfhu@cjlu.edu.cn.
³ Wake Forest University, 1834 Wake Forest Rd., Winston Salem, NC 27109, United States.
⁴ College of Civil Engineering, Zhejiang University of Technology, Hangzhou 310023, China.
⁵ Zhejiang Provincial Key Laboratory of Solid Waste Treatment and Recycling, School of Environmental Science and Enginee ring, Zhejiang Gongshang University, Hangzhou 310012, China; Instrumental Analysis Center of Zhejiang Gongshang University, Hangzhou 310018, China. Electronic address: longyy@zjgsu.edu.cn.

PMID: 35030490
DOI: 10.1016/j.jhazmat.2021.128199

Abstract

The sulfate reduction behavior of the waste-leachate transition zone of landfill was investigated at different temperatures and moisture contents. Marked differences in the sulfate reduction behavior were observed in the waste-leachate transition zone. The highest H₂S concentration was observed when the solid-to-liquid ratio was 1:3 at both temperatures. Although more leachate led to higher H₂S concentrations, the solid-to-liquid ratio was likely of subordinate significance compared with temperature. The microbial community was more unstable at 50 °C and more extensive mutualistic interactions among bacteria were observed, resulting in SRB showing a more violent response to changes in the solid-to-liquid ratio. At 25 °C, it's the opposite. A temperature of 25 °C was suitable for most SRB (such as Desulfomicrobium and Desulfobulbus), while some specific SRB that did not contain the functional genes (such as Dethiobacter and Anaerolinea) played a pivotal role in the significant differences in sulfate reduction behavior observed at 50 °C. This study provides a theoretical basis for controlling the release of H₂S from landfill.

Keywords: H(2)S; Landfill; Sulfate reduction; Waste-leachate transition zone.

Publication types

Research Support, Non-U.S. Gov't

MeSH terms

Bacteria
Microbiota*
Sulfates
Waste Disposal Facilities*

Substances

Sulfates