• ALGAE
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• 제18권2호
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• pp.169-176
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• 2003

Algal growth potential test (AGPT) bioassay were conducted to evaluate the stream and reservoir water in the Okchon Stream Watershed during May to September 2002. The water quality of the stream water was clean in the upstream, deteriorating toward the downstream. In particular, SRP and $NH_4$ significantly increased due to treated wastewater. The average AGPT value of the Okchon Stream watershed was 22.4 mg dw ${\cdot}l^{-1}$, with the range of 0- 195.7 mg dw ${\cdot}l^{-1}$. AGPT value was the highest immediately after inflow of treated wastewater, averaging 91.3 mg dw${\cdot}l^{-1}$. AGPT was highly correlated with SRP, $NH_4$ and TIN factors, with P having the greatest effect on the growth of algae. Among N components, $NH_4$ was preferred to $NO_3$ for the growth of algae. Likewise, AGPT was closely linked to meteological and hydrological effects and development of natural phytoplankton. In survey stations, mesotrophic, eutrophic and hypertrophic conditions accounted for 43%, 21% and 36%, respectively. On the other hand, hypertrophic condition focused on the downstream reaches. AGPT was useful in determining not only the limiting nutrients but also the water fertility for the growth of algae. Based on the AGPT results, the management of point sources for water pollution in treated wastewater was important in the protection of aquatic environment in the stream and embayment.

• 한국실내디자인학회논문집
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• 제21권1호
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• pp.220-227
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• 2012

After The Ramsar Convention took place in Korea in 2008, public interest in environment heightened, and the government has been allocating its budget for conserving our environment. Therefore, the present study focuses on eco-friendly spatial images particularly shown in ecological museums in Korea which recognizes the value of the environment and the ecology and tries to both protect them and alert people about it. The purpose of this study is proving what consist of eco-friendly spatial images by analyzing the expressive word of eco-friendly images and the image of space, providing a basic data for future space planning of ecological museums. To do this, the present study proceeds in three steps. First of all, the base of research in analyzing stage is firmly established by grasping general theories and terms regarding spatial image. As a second step, the composition and the characteristics of exhibition is clarified through on-spot investigation to provide comparative data for spatial image assessment in the future. Also through this step, we could understand how the exhibits are designed currently. In the last stage of research, expressive words regarding eco-friendly spatial images are extracted and used to analyze the spatial image of ecological museums. And the following three conclusions is deduced. First, the expressive words of eco-friendly spatial image that are extracted are as following: "healthy", "coexisting", "clean", "blending", "warm", "soft", "lively", "pure", "cool", "fresh ", "comfortable", "relaxed", "mild", "free", "harmonious", and "healing". As the second conclusion, color, and material, the formation which is an architectural factor did not have a great impact on forming eco-friendly image, but the color and the material did. The third conclusion was that the display with natural aspects actively utilized increased eco-friendly spatial image.

• 한국신재생에너지학회:학술대회논문집
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• 한국신재생에너지학회 2010년도 춘계학술대회 초록집
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• pp.244.1-244.1
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• 2010

Bio energy development by using Low Calorific Gas Turbine(LCGT) has been developed for New & Renewable energy source for next generation power system, low fuel and operating cost method by using the renewable energy source in landfill gas (LFG), Food Waste, water waste and Livestock biogas. Low calorific fuel purification by pretreatment system and carbon dioxide fixation by green house system are very important design target for evaluate optimum applications for bio energy. Main problems and accidents of Low Calorific Gas Turbine system was derived from bio fuel condition such as hydro sulfide concentration, siloxane level, moisture concentration and so on. Even if the quality of the bio fuel is not better than natural gas, LCGT system has the various fuel range and environmental friendly power system. The mechanical characterisitics of LCGT system is a high total efficiency (>70%), wide range of output power (30kW - 30MW class) and very clean emmission from power system (low NOx). Also, we can use co-generation system. A green house designed for four different carbon dioxide concentration from ambient air to 2000 ppm by utilizing the exhaust gas and hot water from LCGT system. We look forward to contribute the policy for Renewable Portfolio Standards(RPS) by using LCGT power system.

• 한국화재소방학회논문지
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• 제15권4호
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• pp.78-85
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• 2001

본 논문에서는 몰드변압기의 난연성 및 NAF S-III에 의한 소화특성에 관해 연구하였다. 연구방법으로써 몰드변압기의 주재인 에폭시수지의 연소과정과 최근 청정소화약제로 사용되고 있는 NAF S-III의 소화과정을 이론적으로 고찰하였다. 또한 이의 증명을 위해 몰드변압기에 대한 연소.소화실험을 실시하였다. 실변압기를 전기실과 유사한 조건의 수평가열로에 장치하여 발화시킨 후, 이의 소화과정을 자연소화와 인위적 소화로 구분하여 관찰하였다. 발화된 변압기의 소화에는 NAF S-III계 소화약제가 분사되었다. 분사된 약제량은 연소중인 몰드변압기에 대한 소화능력을 갖춘 경제량이며, 이는 행정자치부 고시를 근거로 산출되었다. 이렇게 계산된 소화약제의 분사에 의해, 발화된 변압기는 1분만에 완전히 소화되었다. 연구 결과, 몰드변압기가 설치된 전기실의 경제적 소화약제량을 산출할 수 있었으며, 실험을 통해 몰드변압기의 난연성과 청정소화약제인 NAF S-III의 소화능력을 확인하였다. 이를 토대로 국내 전기실에 채용된 소화설비를 경제적이며, 환경보전의 목적으로 적용할 수 있는 규모를 예측할 수 있었다.

• 유통과학연구
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• 제17권10호
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• pp.107-114
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• 2019

Purpose - This is longitudinal research which aims to investigate the meaning of greenness to consumers' behavior. Consumers adopt green marketing as a new factor in product buying and consumption and more and more consumers prefer green product and services. Consumers' green buying behavior can be different from other purchasing experiences. There would be changes in the meaning of green as time passed and it can be different from countries to other countries. This study examines focus group studies with several groups. There is a ten-year gap between 2010 focus group and 2019 focus group interviews. With this ten-year gap, we can find the change of greenness to consumers. Research design, data, and methodology - The data were collected from Turkish, Korean, Kazakhstan people. This is a cross-sectional study and focus group interview was designed. We can gain information relevant to the research problem with using focus group study and get some insights into basic needs and attitudes of green marketing. The subjects for green purchase interviewee were confined to under 40 years old's shoppers regardless of gender. The first study was investigated with several groups in 2010 and the second interview were conducted in 2019. Results - Results show that the meaning of greenness for consumer has changed over time in accordance with the growing accordance of environmental sustainability. Basically, green marketing still means valuable, natural, recycle-able, good for health, clean, smart behavior, essential benefit. The concept of greenness significantly evolved since it was investigated in 2010. It moves away from focusing on specific environmental issues to considering global sustainability issues. Especially we found that greenness can be related with globalization, higher education, social status at the 2019 interview. Conclusions - This paper attempted to confirm the green marketing is essential and expands its meaning to various aspect. Usually, we can think green marketing is everywhere, therefore, people don't care about green issues in real. But consumers are adopting green marketing more and more, it can be a means to attract potential consumers. Therefore, companies should provide enough greenness information for people and they might apply greenness communication to attract potential customers.

• 한국지하수토양환경학회지:지하수토양환경
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• 제10권6호
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• pp.1-9
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• 2005

토양오염으로 인해 피해가 발생하면 그 피해배상과 토양오염정화에 대한 책임을 진다. 이러한 책임은 민사상의 일반적 책임과는 다르다. 토양환경보전법상으로는 피해에 대하여 과실책임이 아닌 무과실책임을 지우고 있으며, 공동의 책임인 경우에는 연대책임(부진정연대책임)을 지우고 있다. 이것은 피해자의 구제를 용이하게 하기 위한 것이다. 그리고 토양정화책임과 그에 따른 비용책임에 대하여도 소급책임, 엄격책임, 연대책임을 지게하고 있다. 다만 천재지변과 전쟁으로 인한 경우에는 면책하고 있다. 책임당사자는 오염유발자와 토양오염시설의 소유 또는 점유자 및 운영자, 그리고 그 시설을 양수한 자 및 인수자로 규정하고 있다. 이와 관련하여 책임당사자가 불명하거나 무자력 등으로 인하여 책임을 질 수 없는 경구에 결국 국가가 책임을 짐으로써 국민의 조세부담을 가중시킬 염려가 있다 따라서 책임당사자의 범위를 확대시키거나 정화비용에 대한 기금제도의 활용이 요청된다

• 환경영향평가
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• 제12권3호
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• pp.137-150
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• 2003

This study aims to survey whether local governments have legislated laws and regulations on environment impact assessment system, to compare and analyze specific projects and their scale, assessment items, and procedures & discussion process, to identify issues and generate improvement plans, and to suggest a direction for future legislation to local governments that plan to legislate laws and regulations in the future. Major outcome of the study are as follows. First, terminologies used for environment impact assessment by local governments need to be unified. Also, laws and regulations need to be legislated soon. Second, in "urban development project" areas, a total of nine project areas including "quarrying of soil and stone, sand, gravel, and minerals" was essential common projects. A total of six project types were added or newly established compared to national systems. Among them, four project types were added within national-level project areas and two project types were not available under the national-level project areas and newly added due to the nature of local governments. Third, in terms of project scale, scale enhancement of "urban development project" was most common. Analysis showed that in case of clean natural environment such as Cheju Island, it is necessary to consider reinforcing project areas where development activities take place directly in forests or rivers such as "industrial base and complex development", "water resource development", and "development of tourism complex." Fourth, the discussion and review procedures of assessment reports were similar to those at government level. However, in case of Seoul city, it is required to write a "preparation plan" before drafting an assessment report. The city features partial introduction of scoping and screening, which allows to exempt discussion procedures if impact on environment is found to be minimal after drafting the assessment report. In case of national-level, it has a dual system that is split between Ministry of Construction and Transportation and Ministry of Environment. However, in case of environment impact assessment of local governments, it is a single system where city mayors and provincial governors are in charge of both project execution and environmental assessment. Therefore, the most important task is how to satisfy objectiveness and accountability.

• 한국물환경학회지
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• 제26권5호
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• pp.754-760
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• 2010

This study was carried out not only to evaluate optimal operating condition to increase biogas production, but also to estimate feasibility of renewable energy from anaerobic digester of sewage sludge. Semi- continuous Fed and Mixed Reactors (SCFMRs) were operated in various condition to quantify the reactor variables. The result of SCFMR operation showed that the biogas productivity and total volatile solids (TVS) removal of total solids (TS) 4% reactor at hydraulic retention time (HRT) 20 days with Organic Loading Rate (OLR) of $1.45kg/m^3-d$ were $0.39m^3/m^3-d$ and 26.7%, respectively which was two times higher than that of TS 2.5% reactor. Consequently the daily biogas production of $20,000m^3$ would be possible from the total volume of $52,000m^3$ of anaerobic digesters of the municipal wastewater treatment plant in D city. In feasibility study for the Biogas utilization, combined heat and power system (CHP) and CNG gasification were examined. In case of CHP, the withdrawal period of capital cost for gas-engine (GE) and micro gas-turbine (MGT) were 7.7 years and 9.1 years respectively. biogas utilization as Clean Natural Gas (CNG) shows lower capital cost and higher profit than that of CHP system. CNG gasificaion after biogas purification is likely the best alternative for Biogas utilization which have more economic potential than CHP system. The withdrawal period of capital cost appeared to be 2.3 years.

• Asian-Australasian Journal of Animal Sciences
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• 제24권9호
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• pp.1318-1328
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• 2011

The tropics is not an ideal location for calf rearing as the high temperatures and humidities introduce many potential disease problems to milk fed calves. In addition, the type of dairy farming (generally poorly resourced small holder farming) and the general lack of awareness of the long term implications of poorly reared stock do not encourage farmers to pay close attention to their calf and heifer rearing systems. Surveys of calf rearing systems in Asia, tropical Africa and South America highlight the high calf and heifer mortalities. A range of 15 to 25% pre-weaning calf mortality is typical on many tropical dairy farms. It is often as high as 50%, indicating very poor calf management. This contrasts with US findings of less than 8% mortality from birth to 6 months while surveys of Australian farmers report only 3% losses. Simple extension programs on farms in Sri Lanka and Kenya have drastically reduced calf mortalities and improved pre-weaning growth rates. Improved management strategies leading to lower calving intervals, higher calving rates, reduced still born and pre-weaned calf mortalities and fewer non pregnant heifers can supply many more dairy herd replacements than currently occurs. Such strategies can increase the number of replacement heifer calves in the herd from 15 to over 35%, thus allowing farmers to increase their herd sizes through natural increases. Simple management procedures such as ensuring adequate intake of good quality colostrum within the first 12 hours of life, housing and good hygiene to minimise disease transfer, providing clean drinking water, developing appropriate feeding protocols to encourage early rumen development and paying closer attention to climate control and animal health can all lead to improved calf vigour and performance. Good record keeping is also important so farmers can more easily identify susceptible calves and quickly treat potential problems.

• 한국가스학회지
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• 제10권4호
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• pp.34-40
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• 2006

본 논문은 지역집단 냉방에너지 공급시스템과 환경보호정책에 관한 융합기술을 에너지절약과 미이용 에너지인 냉열자원의 활용성을 함께 다루고 있다. 지역집단 냉 난방 시스템은 에너지를 절약하고, 비용을 절감하며, 안전성을 확보할 수 있는 효과적인 기술이다. 에너지가 생활수준의 향상에 긍정적인 영향을 주기 위해서는 에너지 절약과 환경보호정책을 균형감 있게 고려해야 한다. 냉열에너지는 LNG를 기화하는 과정에서 생산할 수 있지만, 바다의 심층수와 빙축열에서도 얻을 수 있다. 지역집단 냉방에너지는 아파트, 사무실, 공장설비 등에 냉열공급 파이프라인을 통하여 공급하게 된다. LNG 냉열에너지는 전기에너지와 냉매를 사용하여 작동하는 기존의 에어컨 시스템을 대체할 수 있는 경쟁력 높은 에너지이다. 청정에너지이고 운전비용을 줄이는 것으로 알려진 LNG 냉열은 $CO_2$와 같은 대기오염원과 자연환경에 유해한 냉매방출을 방지할 수 있다. 본 연구에서는 LNG 냉열에너지의 사용과 에너지 절약, 그리고 환경보존에 중요한 영향을 미치는 융합기술에 대한 유익한 정보를 제공한다.