Search | Korea Science

정하익
- Proceedings of the Korean Geotechical Society Conference
- /
- 2001.11a
- /
- pp.85-95
- /
- 2001
There has been a steady increase in closed waste landfill. Sanitary and contamination prevention systems such as liner system, leachate treatment, gas treatment system were not installed in unregulated waste landfill. This study was carried out to introduce the rehabilitation method and case of unregulated closed landfill.
PDF

Lee, Young-Hyeong;Park, Sung-Hyun;Sung, Nak-Chang
- Journal of the Korea Organic Resources Recycling Association
- /
- v.9 no.4
- /
- pp.55-60
- /
- 2001
This study was performed to investigate production characterisitic of methane gas in anaerobic digestion reactor according to input type of food waste. In the production rates of $CH_4$ gas per g $VS_{added}$, reactor R2, R3, R4, R5, and R6 in which sewage sludge and food waste were combined with mixing ratio of 1:0.1, 1:0.3, 1:0.5, 1:1, and 1:2 showed 85mL, 62mL, 67mL, 72mL, and 73mL $CH_4/g$ $VS_{added}$ which were much more than sewage sludge digestion alone. Methane content according to crushing size of food waste respectively showed 51.1%(raw food), 53.1%(2~4mm), and 50.6%(<2mm), In case of methane production according to washing of food waste, R12(7~8 times washing) showed the highest methane production.
PDF

Lee, Hye Hyun;Park, Kyu Won
- Journal of Korean Society of Environmental Engineers
- /
- v.38 no.5
- /
- pp.249-254
- /
- 2016
In this study, we investigated the main characteristics of off-gas generated from melting process and off-gas treatment system operation example to provide some primary data for commercial vitrification facility design. The purpose of vitrification facility operation is to treat hazardous materials in the radioactive wastes and harmful off-gas containing a variety of chemical species generated in the glass melting process. Constructing and operating vitrification facility essentially need to be licensed through safety analysis; it is very important to treat radionuclide and hazardous materials below the legal environment emissions regulation level. We must accurately understand the characteristics of off-gas and apply an appropriate off-gas treatment process accordingly. Thus, to design the appropriate off-gas treatment there must be a wide range of elements taken into account such as characteristics of waste and melter, regulation guidance of off-gas, characteristics of generated off-gas and off-gas treatment system performance assessment.
https://doi.org/10.4491/KSEE.2016.38.5.249 인용 PDF KSCI

Lee, Suyoung;Yoon, Young-Sam;Kang, Jun-Gu;Kim, Ki-Heon;Shin, Sun Kyoung
- Journal of the Korea Organic Resources Recycling Association
- /
- v.24 no.1
- /
- pp.21-29
- /
- 2016
We mix food waste leachate and sewage sludge by the proportion of 1:9, 3:7 and 5:5. It turns out that they produced 233, 298 and 344 $CH_4{\cdot}mL/g{\cdot}VS$ of methane gas. The result suggests that as the mixing rate of food waste leachate rises, the methane gas productions increases as well. And more methane gas is made when co-digesting sewage sludge and food waste leachate based on the mixing ratio, rather than digesting only sewage sludge alone. Modified Gompertz and Exponential Model describe the BMP test results that show how methane gas are produced from organic waste. According to the test, higher the mixing rate of food waste leachate is, higher the methane gas productions is. The mixing ratio of food waste leachate that produces the largest volume of methane gas is 3:7. Modified Gompertz model and Exponential model describe the test results very well. The correlation values($R^2$) that show how the results of model prediction and experiment are close is 0.92 to 0.98.
https://doi.org/10.17137/korrae.2016.24.1.21 인용 PDF KSCI