• 환경위생공학
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• 제6권1호
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• pp.103-108
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• 1991

Visibility studies are conducted in oxidizing organic compounds with ozone to investigate the oxidation in the waste and sewage water. While the ozone has been used as one of the major oxidation of the waste and sewage water, it is not effective to distroy the polluted organic compounds with the practical concentration in waste water treatment. The result are shown follows ; 1. Upon oxidizing organic compound with ozone, the former is much oxidized under three meters and the latter under the ABS waste water. 2. In case of being oxidized organics waste water with ozone codis, much removed under medicine and chemical waste water than anothers of primary treatment process. 3. The final treated waste water of oxidizing organics is higher than that of filtered water or sedimented water. Specially in organics waste water the colority after oxidizing decrease from 95% to 99.9% this suggests that any organic compounds produced during ozonation night be dissdved in the final treated waste water.

• 농업과학연구
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• 제47권1호
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• pp.193-204
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• 2020

This experiment was conducted to study the effect of organic fertilizer on the growth of Peucedanum japonicum Thunberg and the change of soil chemical characteristics. The organic matter contents of coffee sludge and dried food waste powder were 44.26 and 51.18%, respectively. These values exceed the organic matter content of organic fertilizers recommended by the Rural Development Administration (RDA) of South Korea by more than 30%. Accordingly, they indicate the possibility of their use as organic fertilizers. The results from the analysis of soil properties after cultivation showed that the organic matter content of coffee sludge amended soils was two-fold higher than that of dried food waste powder amended soils. However, the content of available phosphorus was two times lower in the coffee sludge amendments. It is expected that the dried food waste powder was actively used to decompose organic substances, and that phosphoric acid was added by the soil microorganisms used to decompose organic substances. In terms of Peucedanum japonicum Thunberg growth, leaf discoloration was observed for all treatments except with the standard rate of dried food waste powder. The standard rate of dried food waste powder also produced relatively better results than other treatments with regard to other growth characteristics such as root length (34.08 cm), root diameter (0.78 cm), and fresh root weight (4.77 g plant^-1). Therefore, the standard rate of dried food waste powder produced better results than other treatments and can be used as an organic fertilizer in the growth of Peucedanum japonicum Thunberg.

• Nuclear Engineering and Technology
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• 제54권12호
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• pp.4441-4448
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• 2022

The electrochemical oxidation process has been widely studied in the field of wastewater treatment for the decomposition of organic materials through oxidation using ·OH generated on the anode. Pt anode electrodes with high durability and long-term operability have a low oxygen evolution potential, making them unsuitable for electrochemical oxidation processes. Therefore, to apply Pt electrodes that are suitable for long-term operation and large-scale processes, it is necessary to develop a new method for improving the decomposition rate of organic materials. This study introduces a method to improve the decomposition rate of organic materials when using a Pt anode electrode in the electrochemical oxidation process for the treatment of organic decontamination liquid waste. Electrochemical decomposition tests were performed using sodium dodecylbenzenesulfonate (SDBS) as a representative organic material and a Pt mesh as the anode electrode. Y₂O₃ particles were introduced into the electrolytic cell to improve the decomposition rate. The decomposition rate significantly improved from 21% to 99%, and the current efficiency also improved. These results can be applied to the electrochemical oxidation process without additional system modification to enhance the decomposition rate and current efficiency.

• 한국지하수토양환경학회지:지하수토양환경
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• 제21권2호
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• pp.22-28
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• 2016

In order to evaluate landfill stabilization based on organic carbon, stoichiometric analysis and a biological methane potential (BMP) test based on modeling were performed at the 2^nd Sudokwon Landfill Site. Mass balance analysis through a BMP test proved to be more adaptable for evaluation, and it showed that 28.9% of landfill organic carbon was expected to remain by 2046, 30 years after landfill closure. The organic carbon ratio of total landfill waste for 2046 is forecasted as 2.9% in demolition waste and 5.1% in household waste, and, if one were to consider plastic as an organic waste, the ratios would increase to 15.9% and 28.3%, respectively. Therefore, it seems that organic matter biodegradation facilitating measures such as bioreactor landfill technology and preemptive recovery of combustible waste are necessary to shorten post closure management periods and to meet the landfill stabilization guidelines more safely.

• 유기물자원화
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• 제6권2호
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• pp.7-30
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• 1998

본 연구에서는 국내 유기성 폐기물의 발생 현황과 자원화 가능성을 산출, 평가하고 현재의 퇴비화 처리 및 이용을 조사한 후 앞으로의 활성화 방안을 제시하였다. 먼저, 유기성 폐기물의 대표격인 음식물찌꺼기는 정부의 꾸준한 감소노력으로 점차 발생량이 감소하고 재활용율도 '97년 9.6%까지 점차 증가하는 추세에 있음을 알 수 있었다. 그러나 이러한 재활용율은 아직 미진한 수준으로 더욱 더 향상시키는 것이 필요하며 적극적인 분리수거, 재활용 체계 구축이 꾸준히 진행되어야 하는 것으로 판단되었다. 한편 '97년 전국 축산분뇨의 발생량은 126,339톤/일로서 '94년 발생량 112,750톤/일 보다 11.2%가 증가한 것으로 산출되었고, 전국 77개소의 하수종말처리장에서 발생되는 하수처리슬러지는 '96년도에 하수처리량의 0.03%에 달하는 하루 3,500톤 정도가 발생되는 것으로 나타났다. 사업장 일반 유기성 폐기물과 별도의 관리를 필요로 하는 사업장 지정 폐기물 중 유기물류 등 '96년도 전체 유기성 산업폐기물의 잠재에너지함량은 연간 288만TOE로 산출되었으며 이는 '96년 우리나라 1차에너지 총소비량 1억6천5백만TOE (통상산업부, 1997)의 1.75%에 달하는 것으로 평가되었다. 이중 폐수처리 오니는 재활용율이 31%대에 그치고 상대적으로 매립처리의 비율이 높은 상태로서 발생량이 큰 것을 감안할 때 향후 보다 더 재활용에 대한 고려가 필요한 것으로 분석되었다. 퇴비화 원료는 주로 축산폐기물, 인분, 식품가공 부산물, 어박류, 부엽토, 톱밥 등이었으며, 최근에 이르러 비로소 음식물쓰레기, 오니류의 퇴비화가 시도되고 있었다. 퇴비생산량은 '96년 4월 현재 288개 생산업체에서 약 42만톤 정도를 생산하고 있었으며, 농업용으로의 사용이 가장 많았고 그 외 산림용이나 조경용으로의 사용은 매우 제한되어 있었다. 결론적으로, 퇴비 이용의 활성화를 위해 퇴비제품 규격의 표준화, 퇴비분석 및 품질관리 방법의 확립, 분리수거 및 퇴비화를 통한 품질 개선 등이 필요한 것으로 사료되었다. 특히 도시 산업 유기성 폐기물 퇴비의 사용 증대를 위해 확실한 부숙퇴비의 생산과 함께 중금속 등 유해물질을 줄이는 것이 퇴비 생산량의 증가 못지 않게 중요하다 판단되었다.

• 한국방사성폐기물학회:학술대회논문집
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• 한국방사성폐기물학회 2017년도 춘계학술논문요약집
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• pp.368-368
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• 2017

• 한국농공학회지
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• 제42권5호
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• pp.114-124
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• 2000

The method to estimate agricultural organic matter flow on the regional scale was established and applied to a rural area in Chongwon-gun, Chungbok in 1996. The study area is of about 67$\textrm{km}^2$ and its population is about 7,000. The stocks and flows of organic matter are represented in dry weight per unit area and dry weight per unit area per year, respectively. the amount of inflow of organic matter indicates a possibility to cause environmental pollution. the amount of animal waste 767 kg/ha/yr account for 42 percent of total amount of organic waste 1,834 kg/ha/yr and therefore the environment in study area is greatly influenced by livestock. The decrease in recycling rate of animal waste form 100% to 70% has greatly increased the amount of disposal waste nearly twice, i.e., from 267 kg/ha/yr to 497kg/ha/yr . The results of this study demonstrate that appropriate animal population, increase in recycling of animal waste and preservation of agricultural land are necessary for environmental conservation of the study area.

• Environmental Engineering Research
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• 제22권3호
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• pp.237-244
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• 2017

At present, in India, handling of solid waste has become a major challenge for the municipal authorities. Composting of solid waste, especially organic waste, can be one of the solutions to tackle the issue of handling solid waste. The present study is focused on agitated piles composting of flower waste (FW). Five combinations of FW with dry leaves (DL) and cow dung (CD) were prepared to conduct the study. Significant changes were observed due to the addition of bulking agent. The bulking material helps to reduce the production of leachate and also to maintain the aerobic condition within the piles. The reduction of total organic carbon was 21% in FW composting which increased by 36.48% during the composting of FW on addition of DL and CD. On the 120th day of composting, the pH of pile five (70 kg FW + 20 kg CD + 15 kg DL) was 7.33, electrical conductivity 2.77 mS/cm, total organic carbon 26.9%, total nitrogen 2.2%, and C:N ratio was 12. Appropriate proportion of waste mixture played an important role in providing favorable conditions for the microbial transformation of flower waste to stabilized compost. Finally, FW with the combination of CD and DL was found to be successful during pile composting.

• 한국안전학회지
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• 제32권2호
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• pp.1-6
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• 2017

Modern society has been experiencing by population growth and urbanization that bring, a change of eating habits which has occurred a various types of waste in a large amount. Even though these wastes are required an immediate treatment with difficulties unsanitary handling and existing waste treatment method are by incineration, fermentation, drying and etc. however a bad smell occurs after the treatment that need's a lot of energy in processing organic wastes with high moisture contents and wasteful and inefficient problem. The strength assessment of the organic waste agitating vessel is required in terms of safety due to the differences of loading on the shaft that was treated by agitating the mixture of food waste. The damage of agitating axis is depended on steam pressure, temperature condition and the force moment that exerted by the food waste. Thus the strength assessment and stability evaluation are very important, especially to handle a hard waste. In this study the rotation capacity of agitation is about 5 tons considering general structural rolled steel pressure vessel strength and steam pressure. The purpose is to estimate the safety and strength evaluation for a agitator axis and impellers according to the rotating angle of the axis under the condition of the 3.2 ton capacity reactor.

• 한국지반신소재학회논문집
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• 제15권4호
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• pp.1-8
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• 2016

이 연구의 목적은 소다회 생산과정에서 발생한 매립지의 압밀특성을 연구하는데 있다. 소다회를 생산하는 과정에서 발생하는 부산물의 주요성분은 대부분 석회석이다. 이 연구는 우선 폐석회의 압밀특성을 파악하기 위해 시추조사를 통한 불교란 시료를 채취하여 실내실험을 실시하였다. 실험결과 폐석회는 소성이 큰 유기질토로 분류되었으며, 유기물 함유량 시험결과 폐석회에 함유된 유기물 함량은 일반 점토에 비하여 높게 나타났다. 또한, 이론적인 방법과 압밀해석 프로그램에 의하여 폐석회의 압밀침하량과 이차침하량을 산정하였다.