• Proceedings of the Korean Society of Agricultural Engineers Conference
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• 2005.10a
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• pp.610-613
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• 2005

물리 화학적 원리에 의한 환경오염 정화방법은 종종 낮은 효율을 보이면서 공사비 부담은 큰 것으로 나타나고 있다. 그러나 생물학적 방법들은 이러한 단점들을 극복하면서 토양과 지하수를 정화할 수 있는 대안으로서 그 가능성을 입증하고 있는 실정이다. 그 중에서 생물학적 통풍법은 유류오염지역에 적용하고 있으며 그 원리는 지중 오염지역에 충분한 산소를 공급함으로서 오염성분이 토착 미생물에 의해 제거되도록 하는 것이다. 본 발표는 유류오염 지역에 적용된 생물학적 통풍법의 효율을 평가하여 제시하였다.

• Journal of Korean Society of Environmental Engineers
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• v.22 no.7
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• pp.1233-1241
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• 2000

The purpose of this study is to see the remediability and pilot system operating condition on diesel contaminated areas. Air permeability(k) and trend of gas phase ($O_2/CO_2/VOCs$) concentration to determine the remediation rate of the contaminated sites are very important. So we tested air permeability and trend of gas phase concentration. Throughout soil vapor extraction(SVE) and bioventing hybrid pilot test on different conditions, the range of air permeability(k) was 1985~1194 darcy. The tests result in soil vapor extraction and bioventing hybrid system was appropriate on this test sites, and the suitable injection air flow rate was $3.5m^3/hr$.

• Journal of the Korean Society for Railway
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• v.3 no.3
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• pp.101-108
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• 2000

In this study, we tested hybrid pilot system combined with soil vapor extraction and bioventing methods on the contaminated railroad soil. So, we found out the remediability and operating conditions. Air permeability(k) and gas phase(O$_2$/CO$_2$/VOCs) level trend are very important to determine the remediation rate of the contaminated sites. Throughout hybrid pilot test on different conditions, the range of air permeability(k) was 1985∼1194 darcy. The tests results in hybrid system was appropriate on this test sites, and the suitable injection air flow rate was 3.5㎥/hr. So, we suggested a basic data for the remediation and management of contaminated railroad soil.

• Proceedings of the Korean Society of Agricultural Engineers Conference
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• 2005.10a
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• pp.410-416
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• 2005

생물학적 통풍법은 유류오염 지역에 자주 적용되는 정화공법이다. 이 과정은 지중에 산소를 충분히 공급함으로서 토착 미생물에 의한 오염성분의 분해를 가능하게 한다. 따라서 이 공법의 적용시 공정진행에 따른 공법의 효율성 분석과 장기적인 정화효율 예측을 위한 지중 가스성분의 모니터링 시스템 도입이 매우 중요하다. 그러나 우리나라에서는 아직 그 적용사례가 보고된 바 없다. 따라서 본 연구에서는 현장에서 토양가스 성분의 변화를 모니터링할 수 있는 시스템을 개발하여 적용한 사례를 시스템의 구성과 측정방법, 관측결과를 중심으로 소개하였다. 현장적용 결과는 토양가스 모니터링 시스템은 운용 시작 후 6개월동안 센서나 측정장비에서 문제가 발생되지 않았으며, 공정관리를 위한 공법효율성 분석에 필요한 자료를 지속적으로 제공하고 있다.

• Journal of The Korean Society of Agricultural Engineers
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• v.49 no.1
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• pp.67-76
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• 2007

Bioventing is commonly used for petroleum hydrocarbon (PHC) spills. This process provides better subsurface oxygenation, thus stimulating degradation by indigenous microorganisms. Therefore soil vapor monitoring points (VMPs) are extremely important in determining the potential effectiveness of bioventing and in long-term monitoring of bioventing progress. In this study in-situ soil gas monitoring well (GMW) was developed and presented the pilot test results which recover the contaminated site by bioventing method. The result of application was successful and it was expected that GMW developed could be applied to the evaluation procedure of bioventing effectiveness and long-term remediation potential.

• Korean Chemical Engineering Research
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• v.45 no.4
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• pp.311-318
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• 2007

Soil contamination in Korea has been accelerated every year. Because of their persistence and cumulative tendency in the environment, soil contaminants have potential long-term environmental and health concerns and it is estimated to cost enormous expense for clean-up. Korea government has legislated the law on conservation of soil environment in mid 1990s, and managed and treated hazardous wastes in contaminated sites as a remediation policy since then. Soil remediation technologies are classified into in-situ/ex-situ or biological/physico-chemical/thermal processes according to applied places or treatment methods, respectively. In Korea, clean-up of polluted sites has been mostly carried out at military areas, railroad-related sites and small-scale oil spilt sites. For these cases, in-situ remediation technologies such as soil vapor extraction (SVE) and bioventing were mainly used. In recent days, an environmental-friendly soil remediation emerged as a new concept - for example, a new soil remediation process using nanotechnology or molecular biological study and an integrated process which can overcome the limitation of individual process. To have better applicability of remediation technologies, comprehensive understandings about the pollutants and soil characteristics and the suitable techniques are required to be investigated. Above all, development of environmental technologies based on the sustainability accompanied by public attention can improve soil environment in Korea.

• Journal of Wetlands Research
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• v.11 no.1
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• pp.115-121
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• 2009

The hybrid constructed wetland(HCW) as tertiary treatment process of a bio industrial wastewater treatment plant was employed to estimate applications for the reuse of final effluent. Raw wastewater was sequently treated through chemical and biological treatment processes and the biologically treated water was flowed into the HCW. The HCW system was composed of two constructed wetlands connected in series; The one is the aerobic constructed wetland with natural air draft system whose driving force for air supply was the difference between the temperature of the air inside the wetland and the ambient air, and the other is the anaerobic/anoxic constructed wetland. Average influent concentrations of BOD, SS, T-N and T-P in the HCW were 53mg/L, 48mg/L, 34mg/L and 3mg/L, respectively. After being treated at HCW, final effluent concentrations of BOD, SS, T-N and T-P were 2.3mg/L, 1.2mg/L, 7.95mg/L and 0.83mg/L, respectively. Referring to a reuse standard for a sewage wastewater, final effluent could sufficiently be reuse as landscaping, washing or agriculture water. HCW system with the aerobic/anaerobic combined constructed wetland could be achieved a high removal efficiency because each constructed wetland was functionalized to be removed efficiently organics, nitrogen and phosphorus. HCW system could be estimated to be successful application as tertiary treatment process of a various industrial and municipal wastewater.

• 보존과학연구
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• s.35
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• pp.73-86
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• 2014

The Seosanmaaesamjonbulsang (national treasure 84) is carved has a quite developed tectonic line in a precipitous wall of stratified rock to the vertical and horizontal directions. The main buddha and the left part of it have got the biological weathering and the efflorescence has been detected on the shoulder part of the right buddha. It has been caused by the raindrops from upper rock after the dismantling of the protection shelter in 2007. Two proper measures have been taken in order to reduce the weathering and protect it from some damages. The one is removing the contaminant by dry/wet cleaning not to get any damage on the rock. The other is the isolation by the construction of a new waterway used L-30 on the upper part of the rock not to contaminate the surface of Rock-carved triad buddha with the raindrops from upper rock. Moreover, the sunlight for buddha has been increased and good ventilation has been made by cutting down the trees around the Rock-carved triad buddha.