Simultaneous implementation for landfill leachate treatment and desulfurization and decarbonization of landfill gas purification
Journal Title: Energy Environmental Protection - Year 2024, Vol 38, Issue 1
Abstract
To investigate the efficiency and mechanism of treating landfill leachate by two-stage mem⁃brane biofilm reactor (MBfR) in cooperation with desulfurization and decarbonization of landfill gas,we sequentially examined the removal efficiency of organic matter and nitrogen pollutants, as well asthe conversion characteristics of H2S, CO2, and CH4 in landfill gas during the operation of pre-shortrange nitrification MBfR and post - MBfR. After 280 days of operation, experimental resultsdemonstrated that the reaction system successfully achieved high-efficiency desulfurization and decar⁃burization for advanced treatment of leachate along with upgrading landfill gas. By controlling low dis⁃solved oxygen levels in the pre-reactor, nitrosation rates exceeding 85% were achieved while enablingpartial nitrification coupled DAMO-Anammox process. The average removal rates for COD, NH+4, andTN reached 95%, 99%, and 99% respectively, thereby achieving efficient carbon and nitrogen reduc⁃tion for landfill leachate. Following landfill gas purification processes, CO2 content was reduced to lessthan 0.2%, and H2S content decreased to approximately 5%, while CH4 content increased to around80%. This significant upgrade in landfill gas can be attributed to highly active denitrifying anaerobicmethanogenic archaea species within the electron transfer system which enhance CO2 -reducing CH4production through direct electron transfer between species. Furthermore, this study highlights how effi⁃cient landfill gas upgrading is facilitated by enrichment of electroactive Methanothrix and Thiobacillusorganisms on one hand; additionally anaerobic methanogenesis processes with high organic loads con⁃sume many protons leading to increased alkalinity within the system thus enhancing absorption capacityfor CO2 into liquid phase. This further facilitated the reduction of CO2 content and the elevation of CH4content in landfill gas.
Authors and Affiliations
NIE Wenbo|College of Environmental and Ecology, Chongqing University, China, Key Laboratory of the Three Gorges Reservoir Region's Eco-Environment, Ministry of Education, Chongqing University, China, CHEN Yi*|College of Environmental and Ecology, Chongqing University, China, Key Laboratory of the Three Gorges Reservoir Region's Eco-Environment, Ministry of Education, Chongqing University, China
Keywords
Related Articles
- EP ID EP736952
- DOI 10.20078/j.eep.20231211
- Views 48
- Downloads 0
Analysis on the literature review and development frontier of "carbon lock-in" research based on bibliometrics
An analysis of the literature review of "carbon lock-in" research would be crucial for promoting low-carbon research. This paper collects Chinese and foreign literature on "carbon lock-in" from 2000 to 2022 and reviews "...
Performance of treating aquaculture effluent using PHBV/volcanic rock/pyrite synergistic
In order to address the low nitrogen and phosphorus removal efficiencies caused by a low carbon-to-nitrogen ratio in aquaculture effluents, a biofiltration device based on the synergistic coupling of 3-hydroxybutyrate an...
Research progress of immobilized microbial technology in remediation of heavy metal contaminated soil
Soil remediation industry plays an important role in promoting "double carbon" action and improving soil carbon sink capacity. However, the concealment, persistence and irreversibility of heavy metal pollution make the s...
Advances in photocatalytic removal of NO_x and VOCs from flue gas
Nitrogen oxides (NO_x) and volatile organic compounds (VOCs) are significant precursors to particulate matter(PM_2.5) and ozone (O_3), posing serious health hazards. Photocatalytic oxidation technology is gaining increas...
A review of the research progress of ammonia combustion enhancement technology
Under the guidance of the "double carbon strategy", as a new type of zero-carbon fuel, ammonia has gradually attracted attention. To solve the issues of ignition, low flame speed, and narrow flammable range of ammonia co...