전체 매립지의 80%를 차지하고 있는 중소규모 매립지의 경우, 저농도 메탄의 소량 발생으로 인하여 연료 활용은 부대시설 비용 증가로 가격 경쟁력을 갖지 못하고 있다. 매립지가스의 주성분은 메탄과 이산화탄소로 이루어져 있으며, 그 외 미량의 불순물질인 수분, 황화수소, 암모니아, 할로겐 화합물, 실록산 등이 존재한다(Rasi et al., 2007). 이 매립지가스의 주성분인 이산화탄소와 메탄을 분리･정제 등 별도의 농축 없이 직접 사용할 수 있으므로 메탄 활용 공정의 단순화 및 고집적화가 필요하다. 현재, 상용화된 매립지가스 전처리 기술은 가스포집 후 냉각응축, 제습 장치 및 건조/가온 장치 등을 통한 다단계 수분 제거기술을 포함하고 있으며, 탈황 및 활성탄을 이용한 미량 유해성분 제거 기술을 활용하고 있다. 매립지가스의 자원화를 통한 온실가스 감축을 위해서는 이 불순물질을 제거하는 전처리 공정이 필요하다. 불순물질 중 황화수소는 자원화 설비를 부식시킬 수 있으며, 실록산의 경우 연소과정으로 생성된 이산화규소가 발전설비 내 스케일을 형성시켜 설비를 마모시킬 수 있다. 기존 공정에서는 황화수소와 실록산이 독립된 공정에서 제거되어 설비의 설치비 및 유지비가 증대되는 문제점이 있다. 본 연구에서는 매립지가스 중에 포함된 미량의 불순물질을 제거하기 위하여 미량의 수분 제거, 황화수소와 실록산의 동시에 제거할 수 있는 흡착공정을 적용하였다. 따라서, 본 연구에서는 매립지가스 중에 포함된 미량의 불순물질을 충분히 제거하고, 100kW급 가스엔진발전기를 통하여 발전하고, 이를 한전의 전력망에 계통연계하여 매립지에서 발생하는 온실가스를 감축하는 수단으로 활용하였다. 이와 같이 가스엔진발전을 통한 지자체 단위의 중소형 매립지에서 발생되는 온실가스를 감축하는데 적용하였으며, 이에 대한 온실가스 감축 사례에 대한 연구 결과를 도출하였다.

정부의 국가 중기 온실가스 감축목표를 대내외적으로 공표함에 따라 온실가스 감축에 대한 필요성이 절실해져 온실가스 감축을 위한 기술개발이 활발하지만, 정확한 Non-CO2 온실가스 배출량 파악이 어렵고 감축기술에 대한 조사가 부족한 실정이다. 따라서 본 연구는 감축기술 적용이 가능한 Non-CO2(N2O) 온실가스 배출원을 파악하고 예상 감축량을 마련하는데 그 목적을 두었다. N2O는 대부분 경제 산업활동의 인위적 요소로 인해 발생하며 1970년 산업혁명 이후 꾸준히 증가하는 추세이다. N2O는 연료 연소(고정연소, 이동연소), 산업공정(질산 제조, 아디프산 제조 및 카프로락탐 제조), 폐기물소각공정에서 주로 발생되고 있다. N2O 온실가스 배출량은 IPCC 가이드라인의 기본 배출계수를 적용하여 산정하였고, 산정값들의 평균증가율을 적용하여 배출량을 2020년까지 전망하였는데, 연료 연소 중 고정연소의 2020년 N2O 배출량은 총 5,230,760 tCO2eq으로 전망되었고 이 중 에너지산업 부문의 배출량 전망치가 50％ 이상을 차지하였다. 이동연소의 N2O 배출량은 2020년 기준으로 총 1,277,739 tCO2eq으로 전망되었고 총 배출량의 90% 이상이 도로수송의 배출량이 차지할 것으로 전망하였다. 폐기물소각과 미산정배출원(SCR/SNCR)의 N2O 배출량은 2020년 기준으로 각각 총 19,419 tCO2eq, 2,546,502 tCO2eq으로 전망되었다.

Background : Ginseng rain cover farming is expanding around Jinan county and Jangsu country of North Jeolla Province. Some farmers doing ginseng rain cover farming have suffered from difficulties due to hot weather damages. However, it is a situation that the study on mitigation techniques for high temperature damage do not exist with ginseng rain cover farming. Methods and Results : The test covering work was firstly done on April 28th for heat block film+90% black light blocking net, blue double sided film, and PE film+75% black light blocking net and when it comes to second treatment, 30% and 40% shading were implemented for heat block film group and blue double sided film group respectively and 75% black light blocking net was installed on PE film+75% shading group. When it comes to micro-climate measurement in rain cover facility, temperature, humidity and light intensity were measured during the growing period of ginseng. The results are as follows. Regarding the light transmittance (per PAR, 10 am in clear day) in facility with 1st covering, light block film covered group (LBF), blue double sided film group (BDF) and PE film group have 12.9±1.8%, has 11.6±1.0% and 27.1±1.1% respectively and after 2nd covering, in LBF groups, 30% blocking, 40% blcoking and no blocking have 10.6±1.3%, 8.2±0.9% and 12.9±1.8% and in BDF groups, 30% blocking, 40% blcoking and no blocking have 9.4±0.8%, 7.9±0.7% and 11.6±1.0 respectively and PE film group has 10.6±0.7%. Relative humidity also showed the same trend as temperature. The average monthly amount of light and maximum light intensity were lower in 30% and 40% light blocking groups of LBF and BDF and a little higher in no light blocking group compared to PE film group. The degree of high temperature damage was 1 in no LBF of BDF, but no LBF of LBF was so bad like 3. However, there was no high temperature damage in the test groups of blocking films or BDF with 30% and 40% light blocked light screens. Regarding root weight, all secondly treated groups of LBF group and BDF group were lighter compared to 4.36g of PE film group and especially, prism sheetof no light blocking group has 2.5g and BDF of of no light blocking group has 3.21g. 30 % and 40% light blocking groups of LBF group and BDF group were light with 3.20~4.07g. Conclusion : Regarding the analysis result on micro-climate in facility with different cover materials for 2 years old ginseng in ginseng rain cover farming of Gyeonggi Province, the covering method suitable for high temperature damage mitigation in ginseng rain cover farming was that 1st covering was done by PE film+75% black light blocking net and then 75% black light blocking net is additionally covered at a time when outside temperatures reaches 30℃.

Background : Recently, some of the previous stuies reported that was useful technique on growth and yield of organically grown ginseng transplantation in a rain shelter greenhouse. This study was conducted to investigate the optimum method of greenhouse shading for ginseng(Panax ginseng C. A. Meyer) cultivaton in the northern area of Ganwon, Korea. Methods and Results : We carried out to select optimal shade materials and light-penetrated ratio among polyethylene film with two-layered polyethylene net(PEF+PEN) and blue-white duplicated PE film(BWD-PEF) in the condition of greenhouse for ginseng cultivation. The order of light-penentrated ratio by shade meterials was PEN(75%)+PEF 〉 PEN(85%)+PEF 〉BWD-PEF(85%) 〉BWD-PEF(90%) and the order of air temperature was BWD-PEF(85%) 〉BWD-PEF(90%) 〉PEN+PEF(85%) 〉PEN+PEF(75%). The net photosynthetic rate was higher in PEN(75%)+PEF than other shading material treatments during growth season including summer high-temperature period. The root weight and yield were increased by 31.2~55.0% and 25.6~52.2%, respectively under PEN+PEF(75%) compared to other shading materials. Conclusion : We concluded that the PEN+PEF(75%) could be a good shading meterails of the greenhouse for organic 4-year-old ginseng cultivation in northern area of Gangwon, Korea.

In recent years, waste-to-energy conversion using municipal solid waste (MSW) has been gaining attention in municipalities. Such conversion can reduce the dependency of non-renewable energy such as fossil fuels by generating solid refuse fuel (SRF) and diverting landfilling of the waste, although there is debate over the efficiency and economic aspect of the practice. With a growing interest in the conversion, D city is trying to adopt all possible measures towards achieving a material-cycle society by constructing a waste-to-energy town by 2018. The waste-to-energy town will be comprised of energy recovery facilities such as a mechanical treatment facility for fluff-type SRF with a power generation plant, and anaerobic digestion of food waste for biogas recovery. In this paper, we focus on estimating the energy recovery potentials and greenhouse gas (GHG) reduction of MSW by waste-to-energy conversion under three different scenarios. The data required for this study were obtained from available national statistics and reports, a literature review, and interviews with local authorities and industry experts. The lower heating value was calculated using the modified Dulong equation. Based on the results of this study, the energy recovery potential of MSW was calculated to be approximately 14,201-51,122 TOE/y, 12,426-44,732 TOE/y, and 8,520-30,673 TOE/y for Scenarios 1, 2, and 3, respectively. The reduction of GHG by such conversion was estimated to range from 10,074-36,938 tonCO2eq/y, depending on scenario. This study would help determine the production rate of fluff-type SRF to be converted into a form of energy. In addition, this study would aid waste management decision-makers to clarify the effectiveness of recycling of MSW and their corresponding energy recovery potentials, as well as to understand GHG reduction by the conversion.

The study was conducted to obtain the basic information for extending the harvest season and selecting superior cultivars of mango. For the purposes, various cultivars were imported and cultivated in greenhouse condition, Korea. The periods of flowering and fruit maturity and fruit qualities among cultivars were investigated under greenhouse condition. As the early variety, the harvest time of ‘Carrie’ and ‘Glenn’ was fastest as June 3 based on harvest time and cumulative temperature. ‘Kent’, ‘Philippine’, ‘Irwin’, ‘Choc-anon’, and ‘Fairchild’ as the early variety were harvested from June 8 to June 13. ‘Zill’, ‘Florigon’, ‘Alphonso’, ‘Mallika’, ‘Kensington Pride’, ‘Bailey’s Marvel’, and ‘Pinkering’ as midseason cultivar were harvested from June 15 to June 23. ‘Dot’, ‘Keitt’, ‘Gold Nugget’, and ‘Lancetilla’ as late ripening variety were harvested from July 5 to July 10. The fruit weights of ‘Keitt’ and ‘Kent’ were more than 650g and those of ‘Fairchild’ and ‘Lancetilla’ were less than 200g. The fruit weights of other cultivars were from 300 to 400g. The soluble solid contents of ‘Zill’, ‘Irwin’, ‘Kent’ and ‘Glenn’ were almost 15Brix and those of other cultivars were higher than that of ‘Irwin’. The soluble solid contents of ‘Pinkering’, ‘Philippine’, ‘Lancetilla’, ‘Dot’, and ‘Alphonso’ were about 20Brix and flavors of those cultivars are excellent. The acid contents of cultivars were investigated from 0.2 to 0.4% but that of ‘Fairchild’ was 0.8%.

Background : Acreage of rain-shelter plastic greenhouse to prevent anthrax is being gradually increased according to growing importance of safe Boxthorn production. But When Boxthorn is grown in the hot season in rain-shelter plastic greenhouse, quantity of Boxthorn decreases. therefore the research was carried out to investigate Fertilization mode. Methods and Results : Chungwoon was very strong self-incompatibility. Chengyangjaerae, Chengyang18 and CBP11542-206 was self-compatibility. Artificial fertilization rate was slightly higher in roof and side vents than in side vents of rain-shelter plastic greenhouse in hot season. Pollen sterility due to high temperature is not critical because artificial fertilization rate was high in side vents of rain-shelter plastic greenhouse in hot season. Airborne fertilization rate was significantly lower in all varieties. Open fertilization rate was higher in roof and side vents than in side vents of rain-shelter plastic greenhouse Conclusion : Roof and side vents was good in compared to side vents in rain-shelter plastic greenhouse of Boxthorn because of high Airborne and open fertilization rate. Self-compatibility varieties were better than self-incompatibility varieties in rain- shelter plastic greenhouse because of high open fertilization rate.

Background : Root diseases caused by Cylindrocarpon destructans and Fusarium solani decrease the yield and quality of ginseng. Cylindrocarpon root rot is a major disease caused by replanting failure in ginseng garden. Methods and Results : Solarization was done in the infested soil of the greenhouse for summer season (from July 24 to Autumn 31, 2014) after putting green manure (Sudan grass) and calcium cyanamide (CC) into the soil. Mycelium and conidia of C. destructans died at 4 0℃ after 15 hours, and 45℃ after 5 h, but it did not die at 35℃ after 15 h. Those of C. destructans died after keeping it for 2 hours daily at 40℃ for 9 days, and 45℃ for 8 days, but did not die at 38℃ for 9 days. Maximum soil temperature was 55.4℃ in 5 cm depth, 48.7℃ in 10 cm, 44.7℃ in 15 cm, 42.5℃ in 20 cm, and 31.9℃ in 30 cm by putting green manure into the soil and solarization. Reduction of sudan grass increased electrical conductivity (EC), organic matter, P2O5, K, and Mg, while decreased pH, NO3-N, and Na. Addition of calcium cyanamide and urea gave a negative effect on the growth of ginseng because EC and NO3-N were increased excessively than the optimal range. Solarization using green manure mixed with CC was the most effective in decreasing soil-borne pathogens of 2-year-old ginseng. But the root disease that occurred between single treatment of sudan grass and the treatment mixed with calcium cyanamide showed not a significant different. Addition of calcium cyanamide showed the decrease of root weight because leaves were dead early by a excessive increase of EC and NO3-N. Conclusion: Soil disinfection using green manure and solarization in greenhouse was effective in inhibiting root rot, however, it did not completely kill the soil-borne pathogens.

Background: Root diseases caused by Cylindrocarpon destructans and Fusarium solani decrease the yield and quality of ginseng. Cylindrocarpon root rot is a major disease caused by replant failure in ginseng fields. Methods and Results: Solarization of infested greenhouse soil was carried out during the summer season after applying green manure (Sudan grass) and Calcium Cyanamide (CC) on the soil. Mycelium and conidia of C. destructans died at 40℃ after 15 h, but they did not die at 35℃ after 15 h. They also died after keeping the soil at 40℃ for 2 h daily for 9 days, and at 45℃ for 8 days, but they did not die at 38℃ for 9 days. Maximum soil temperature was 55.4℃ at 5 ㎝ depth, 48.7℃ at 10 ㎝, 44.7℃ at 15 ㎝, 42.5℃ at 20 ㎝, and 31.9℃ at 30 ㎝ by incorporating green manure into the soil and using solarization. Solarization using green manure mixed with CC was the most effective in decreasing soil-borne pathogens of 2-year-old ginseng. However, the addition of CC decreased the root weight due to the increase in EC and NO3-N. Conclusions: Soil disinfection using green manure and solarization in a greenhouse environment was effective in inhibiting root rot, however, it did not completely kill the soil-borne pathogens.

This study has conducted greenhouse gas emission reduction test as using Oyster-shells originated PCC paper filler compare to non-Oyster shells used PCC. This examination was estimated and calculated in accordance with both IPCC (Intergovernmental Panel on Climate Change) and World Business Council for Sustainable Development (WBSCD). The greenhouse gas emission reduction estimation result indicates that, when oyster shells are recycled and used as paper filler, it reduces 27.97 tCO2 per 100 ton of oyster shells. It is greenhouse gas emission 44.27 tCO2 from PCC production changed to carbon emission reduction when replaced with oyster shell. LNG greenhouse gas emission 16.3 tCO2 in relation to the pre-treatment with oyster shell per 100 ton is also reflected. As a result, it is assumed that roughly 0.2797 tCO2/oyster shell·ton.

Aluminum can is one of the common and economically valuable recycling items in municipal waste streams. In this study, the reduction rate of the greenhouse gas emission and energy savings were estimated when aluminum cans are recycled by using material flow analysis, US EPA WARM method, and EU Prognos method. Based on the results, approximately 16,630 ton of aluminum in 2010 was recovered as ingot, while 10,873 ton of aluminum can to can recycling occurred in the same year. The reduction rate of aluminum recycling was estimated to be 240,986 tCO2eq/yr by US EPA WARM method, while about 305,283 tCO2eq/yr was found by the recycling using EU Prognos method. The difference resulted partly from the different system boundary and the loss rate during aluminum recycling process. The results of the energy savings and greenhouse gas reduction rate would be valuable for waste management policy makers to estimate the potential reduction rate of greenhouse gas by aluminum can recycling and accelerate recycling infrastructure of waste streams. This study also implies that the applications and results of both methods to estimate greenhouse gas reduction rates by aluminum can recycling should be carefully reviewed and acknowledged before the use of the method due to the different assumptions and results that are anticipated.

This study was conducted to determine the effects of organic vegetable cultivation on the soil physical properties in 33 farmlands under plastic greenhouse in Korea. We were investigated 5~8 farms per organic vegetable crops during the period from August to November 2014. The main cultivated vegetables were leafy lettuce (Lactuca sativa L.), Perilla leaves (Perilla frutescens var. Japonica Hara), cucumber (Cucumis sativus L.), strawberry (Fragaria ananassa L.) and tomato (Lycopersicon spp.). We have analyzed soil physical properties. The measured soil physical parameters were soil plough layer, soil hardness, penetration resistance, three soil phase, bulk density and Porosity. The measurement of the soil plough layer, soil hardness and penetration resistance were carried out direct in the fields, and the samples for other parameters were taken using the soil core method with approximately 20 mm diameter core collected from each organic vegetable field. Soil plough layer was average 36 cm and ranged between 30 and 50 cm, and slightly different depending on the sorts of vegetable cultivation. The soil hardness was 0.17±0.15~1.34±1.02 in the topsoil, 0.55±0.34~1.15±0.62 in the subsoil. It was not different between topsoil and subsoil, but showed a statistically significant difference between the leafy and fruit vegetables. Penetrometer resistance is one of the important soil physical properties that can determine both root elongation and yield. The increase in density under leafy vegetables resulted in a higher soil penetrometer resistance. Soil is a three-component system comprised of solid, liquid, and gas phases distributed in a complex geometry that creates large solidliquid, liquid-gas, and gas-solid interfacial areas. The three soil phases were dynamicand typically changed in organic vegetable soils under greenhouse. Porosity was characterized as range of 54.2±2.2~60.3±2.4%. Most measured soils have bulk densities between 1.0 and 1.6 g cm-3. To summarize the above results, Soil plough layer has been deepened in organic vegetable cultivation soils. Solid hardness (the hardness of the soil) and bulk density (suitable for the soil unit mass) have been lowered. Porosity (soil spatial content) was high such as a well known in organic farmlands. Important changes were observed in the physical properties according to the different vegetable cultivation. We have demonstrated that the physical properties of organic cultivated soils under plastic greenhouse were improved in the results of this study.

This study was carried out to investigate the effect of no-tillage and split irrigation on the growth of pepper plant under green house condition in Jeonnam province. Moisture content of soil at whole quantity irrigation in tillage was increased rapidly regardless of soil depth for initial irrigation and then was decreased continuously until next irrigation. Deviation of moisture content in soil was decreased with increasing depth of soil. Moisture contents of top soil and subsoil (20 cm) at whole quantity irrigation in no-tillage were increased with sunrise, and then decreased with sunset. Moisture contents of top soil in tillage, and top soil and subsoil (20 cm) in no-tillage at half quantity irrigation indicated a cyclic diurnal variation by evapotranspiration. Salinity of soil was increased after initial irrigation and then was decreased continuously until next irrigation. With increasing depth of soil, increases of salinity in soil was delayed. Salinity of top soil in no-tillage was increased between AM 11:00 and AM 12:00, and then showed the highest level between PM 2:00 and PM 6:00 on a cyclic diurnal variation by evapotranspiration. Salinity of subsoil (30 cm) in no-tillage was not measured a cyclic diurnal variation. Moisture content and salinity of soil was positive correlation regardless of tillage and no-tillage cultivation. Growth of pepper in no-tillage cultivation was higher than that in tillage cultivation. Main branch Length and stem diameter of half quantity irrigation plot was higher than that of whole quantity irrigation plot regardless of tillage and no-tillage cultivation. After harvesting, the number of pepper fruits of half quantity irrigation plot was increased remarkably by 49% and47%, in tillage and no-tillage cultivation, respectively. Pepper yield of no-tillage cultivation plot was higher by 8% than that of tillage cultivation plot. Pepper yield of half quantity irrigation plot was increased remarkably by 36% and 39%, in tillage and no-tillage cultivation, respectively.

This study presents detailed emission of greenhouse gases of using Clean Energy Agriculture System according to a cradle-to-gate life-cycle assessment, including emission from energy use and leak of Biogas. Calculations were done with the PASS software and the covered gases are CH4, N2O and CO2, Total GHG fluxes of amount to 1719.03 kgCO2/day, 39.63 kgCO2/day (2.31%) are from facility house process, 0.19 kgCO2/day (0.01%) are from transport process, 696.72 kgCO2/day (40.53%) are from Anaerobic digestion process, 846.61 kgCO2/day (49.25%) are from Heating and cooling system, 135.88 kgCO2/day (7.90%) are from Fertigation production process. The results suggest that for effective reduction of GHG emissions from Facility house using clean energy. Reduction targets should address both the production process as defined by IPCC sectors and the consumption process. An LCA assessment as presented here could be a basis for such efforts.

With a growing concern of greenhouse gas (GHG) emissions due to climate change, many activities and efforts onthe greenhouse gas reduction have been implemented in solid waste sectors. Since recycling is the major managementoption for solid waste in Korea, it is important to estimate the reduction of the greenhouse gas emission during recyclingprocesses. In this study, two common methodologies, Prognos method of EU and waste reduction model (WARM) methodof USA, have been critically reviewed and compared to estimate the reduction for recycling of waste paper in terms ofsystem boundary, recycling processes, and emission factors. As a common point of two methodologies, the reductionfactors for the paper recycling have been developed by subtracting the recycled product emissions from the virgin productemissions to get the greenhouse gas savings. While the recycling losses and transportation are considered in twomethodology development, there are a number of differences between the methodologies in system boundary,transportation distance and forest carbon sequestration. As a result, it caused the difference in final greenhouse gasreduction factor of paper recycling. The reduction factor was −820kgCO2eq/ton in Prognos method, while −3,891kgCO2eq/ton was found in the WARM method. When both methods were applied to recycling of waste paper in Korea,the greenhouse gas reductions by the Prognos method and the WARM method were found to be 3,485.2tCO2eq/day and2,248.8tCO2eq/day, respectively. When the carbon sequestration by forest is considered in the WARM method, thereduction rate was estimated to be 16,538.3tCO2eq/day. The main reasons for such difference can be attributed to systemboundary and forest carbon sequestration. Especially, forest carbon sequestration can be an important factor in Korea thatusually manufactures papers from imported pulp from abroad. This study implies that the applications and results of bothmethods to estimate greenhouse gas reduction by waste recycling should carefully reviewed and acknowledged beforeuse due to the different assumptions and results that are anticipated.

This study was conducted to investigate the effects of sowing density, number of seeds sown per hole, andthinning treatment on growth characteristics and disease occurrence in Panax ginseng under direct sowing cultivation in ablue plastic greenhouse. Seedling were grown from 2 or 3 seeds sown, and the healthiest was only retained, while the restwere thinned out at the foliation stage. NO3-N, P2O5, and organic matter content differed significantly between growthconditions in the plastic greenhouse and in conventional shade in the soil. Disease also tended to be higher in the conven-tional shade than in the plastic greenhouse. Plant height and stem length showed an increasing trend with increasing sowingdensity and number of seeds sown per hole. However, these measures noticeably decreased when thinning treatment wasconducted. Growth of the subterranean part of ginseng was not markedly influenced by sowing density, the number of seedssown per hole, or thinning treatment. Root weight, which is an important factor in yield, was significantly affected by thenumber of seeds sown and thinning treatment. Interestingly, root weight tended to be higher in the thinning treatment plotthan the untreated control plot. Damping-off and root rot increased noticeably as the number of seeds sown increased. Dis-ease also tended to be substantially higher in the thinning treatment plot than the untreated control. However, physiologicaldisorder of the plants did not vary with sowing density, the number of seeds sown, or thinning treatment.