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http://dx.doi.org/10.7849/ksnre.2022.0029

Characteristics of Landfill Gas Generation by Separate Landfill of Construction Waste and Mixed Landfill with Household Waste  

Jong-Keun, Park (Graduate School of Convergence Science, Seoul National University of Science and Technology)
Seung-Kyu, Chun (Graduate School of Convergence Science, Seoul National University of Science and Technology)
Publication Information
New & Renewable Energy / v.18, no.4, 2022 , pp. 1-11 More about this Journal
Abstract
Landfill gas (LFG) generation characteristics in a construction waste landfill zone (block E) and mixed landfill zone (block A) were analyzed. During the period from October 2018 to April 2022, a total of 936×103 and 1,001×103 tons of waste were disposed in block E and block A, respectively. Out of this, 27.1% and 55.6% were biodegradable waste in block E and block A, respectively. The landfill masses of the two blocks were converted to be comparable. Then, the biodegradable waste and organic carbon were estimated by element analysis, biodegradable carbon by biochemical methane potential experiment (DC), and sulfate ion by acid decomposition. Results showed that biodegradable waste, organic carbon, biodegradable carbon, and sulfate ions in block A were 2.1, 1.6, 5.2, and 0.4 times greater than those in block E, respectively. The amount of LFG generated by block A was 4.8 times greater than that by block E. The average concentrations of methane (CH4) were 60.8% and 60.9% in block E and block A, respectively, which were unrelated to the nature of disposed waste. The average concentrations of hydrogen sulfide (H2S) were significantly high in block E (4,489 ppm) and block A (8,478 ppm). As the DC/SO42- of block E and block A were 0.35 and 4.56, respectively, increase in DC/SO42- caused increase in not only the total amount but also the concentration of H2S generated.
Keywords
Landfill gas; Construction waste; Organic carbon; Sulfate ion; Hydrogen sulfide;
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