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 63
- Downloads 0
Applications of zeolite-based catalysts in CO_2 utilization
Development of highly efficient CO_2 conversion technologies is key to advancing carbon capture and unitization (CCU), being very important to achieve the China′s carbon neutral climate goals. Zeolites are microporous an...
Research progress in the preparation of high value added chemicals by directional pyrolysis of biomass
The production of petroleum-based chemical products, which are used in various daily and industrial goods such as cosmetics, lubricants, plastic products, and synthetic fibers, has led to a heavy dependence on petroleum...
Preparation of Magnetic Molecularly Imprinted Polymers Based on Group Sensing Quenching and Their Adsorption Characteristics on Signaling Molecules
In the anaerobic membrane bioreactor (AnMBR), quorum sensing by microorganisms exacerbates biofouling, significantly hindering membrane performance and lifespan. Controlling the concentration of N-acyl homoserine lactone...
Optimization of carbon peak path in Fujian Province based on sparrow search algorithm
In response to the urgent global challenge of carbon emission reduction, reliable pathways to carbon peaking are of significant importance for the implementation of carbon reduction in China. However, the process of carb...
Development of an efficient 3AP-DMEA-butanol-water phase change absorbent for CO_2 capture
Controlling CO_2 emissions from low-concentration sources like coal-fired power plants and steel mills is crucial for achieving "carbon neutrality" . Amine-based CO_2 capture technology is a leading contender for industr...