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Evaluation of Landfilling Method of Organic Sludge from Mix of Pre-treated Organic Sludge and Municipal Solid Waste  

Ko, Jae-Young (Graduate School of Energy and Environment, Seoul National University of Technology)
Phae, Chae-Gun (Graduate School of Energy and Environment, Seoul National University of Technology)
Do, In-Hwan (Graduate School of Energy and Environment, Seoul National University of Technology)
Park, Joon-Seok (Department of Environmental Disaster Prevention Engineering, Kangwon National University)
Publication Information
Journal of Korean Society of Environmental Engineers / v.30, no.3, 2008 , pp. 278-285 More about this Journal
Abstract
This research was performed to evaluate the landfilling method of organic sludge from mix of pre-treated organic sludge (OS) and municipal solid waste(MSW). Organic sludges were dried, composted, and solidified as pre-treatment and the OS and MSW were mixed in ratios of 2 to 8 and 4 to 6. Approximately 1,800$\sim$2,500 L of landfill gas(LFG) was generated in the lysimeter with solidified-OS, which was higher than 1,150$\sim$1,650 L of the dried- and composted- ones. Maximum H$_2$S concentration was found in the following order : Composted-20(80 ppmv) > Composted-40(55 ppmv) > Dried-20(30 ppmv) > Dried-40 $\fallingdotseq$ Solidified-20 $\fallingdotseq$ Solidified-40 (20 ppmv). BOD$_5$ at initial leachate generation period was 38,000 mg/L for Composted-40, 28,000 mg/L for Dried-40, 26,000 mg/L for Dried-20, 21,000 mg/L for Composted-20 and Solidified-40, and Solidified-20 for 17,000 mg/L. In the final period of experiment, BOD$_5$ was low as 300$\sim$500 mg/L in the lysimeter with solidified-OS and MSW and showed 2,000$\sim$3,500 mg/L in dried- and composted- ones. As the results, landfilling by mix of solidified-OS and MSW was evaluated as the most appropriate method for biodegradable organics. Direct landfilling of OS is permitted for landfill site with CDM facility. Therefore, mixed landfilling of solidified-OS and MSW should be considered for much more LFG generation as methane.
Keywords
Organic Sludge; Landfill Gas(LFG); Lysimeter; Odor; Leachate;
Citations & Related Records
Times Cited By KSCI : 3  (Citation Analysis)
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