매립지 메탄 및 악취 배출 저감을 위한 바이오커버 및바이오필터의 현장적용 평가 연구

Abstract

In order to reduce odor and methane emission from the landfill, open biocovers and a closed biofilter were appliedto the landfill site. Three biocovers and the biofilter are suitable for relatively small-sized landfills with facilitiesthat cannot resource methane into recovery due to small volumes of methane emission. Biocover-1 consists onlyof the soil of the landfill site while biocover-2 is mixed with the earthworm casts and artificial soil (perlite). Thebiofilter formed a bio-layer by adding mixed food waste compost as packing material of biocover-2. The removalefficiency decreased over time on biocover-1. However, biocover-2 and the biofilter showed stable odor removalefficiency. The rates of methane removal efficiency were in order of biofilter (94.9%)>, biocover-1(42.3%)>, andbiocover-2 (37.0%). The methane removal efficiency over time in biocover-1 was gradually decreased. However,drastic efficiency decline was observed in biocover-2 due to the hardening process. As a result of overturning thesurface soil where the hardening process was observed, methane removal efficiency increased again. The biofiltershowed stable methane removal efficiency without degradation. The estimate methane oxidation rate in biocover-1 was an average of 10.4%. Biocover-2 showed an efficiency of 46.3% after 25 days of forming biocover. However,due to hardening process efficiency dropped to 4.6%. After overturn of the surface soil, the rate subsequentlyincreased to 17.9%, with an evaluated average of 12.5%.