Go to the main menu
Skip to content
Go to bottom
REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
> Journal Vol & Issue
Journal of the Korea Organic Resource Recycling Association
Journal Basic Information
Journal DOI :
Korea Organic Resource Recycling Association
Editor in Chief :
Volume & Issues
Volume 22, Issue 4 - Dec 2014
Volume 22, Issue 3 - Sep 2014
Volume 22, Issue 2 - Jun 2014
Volume 22, Issue 1 - Mar 2014
Selecting the target year
A Study on the Evaluation of Fuel Characteristic and Economic Benefit for Co-combustion of Dried Sewage Sludge with Coal
Kang, Jeong Hee ; Kang, Jong Yun ; Lee, See Hyung ; Kim, Byung Tae ; Lee, Nam-Hoon ;
Journal of the Korea Organic Resource Recycling Association, volume 22, issue 1, 2014, Pages 11~19
A study on combustion characteristic and evaluation of cost benefit were carried out using dried sewage sludge to evaluate co-combustion with coal in a coal-fired power plant. In the result of proximate analysis, sewage sludge has 78.09%, 79.65% of moisture content in A STP(Sewage Treatment Plant) and B STP, respectively. The dried sewage sludges show 0.12, 0.14 of fuel ratio value, respectively and over 30,000kcal/kg of combustible index. It means that the dried sewage sludges needs to reform from the results of fuel ratio and combustible index. As a results of the economical benefit evaluation of dried sewage sludge, about 73.4 million won through using the dried sewage sludges instead of coal and 56.4 million won through REC(Renewable Energy Certificate) cost were saved, respectively. On the other hand, it occurs 4.2 million won of additional cost related to ash disposal and 2.6 million won of investment/operation cost for co-combustion facility. In conclusion, co-combustion of dried sewage sludges with coal in a coal-fired power plant saves about 123 million won. However, it needs to consider for power supply to produce dried sewage sludges and opportunity cost for environmental pollution and so on to evaluate more reasonable benefit of co-combustion.
Intermediate indicators and sustainability of Renewable Fuel Standard
Lee, Ah-Young ; Koo, Ja-Kong ;
Journal of the Korea Organic Resource Recycling Association, volume 22, issue 1, 2014, Pages 20~26
Interest in renewable fuel of recent has increased. Among them, From next year the government announced that it would enforce the RFS. Interest associated with it are concentrated. The RFS, for manufacturers of transportation fuels such as a vehicle, you are a renewable fuel a certain percentage of the fuel supplied. In other words, it refers to a system of mandatory to supply by mixing biofuels. Already in Europe, America and other developed countries to diversify energy sources and subjected Additionally there since ancient times for its rural development by introducing the RFS takes effect coming. Further and inspect to deal with climate change, which is performed via the RFS. Some even are represented by five axis of the sustainability of the RFS.
A Study on the Viscosity Characteristics of Dewatered Sewage Sludge according to Thermal Hydrolysis Reaction
Song, Hyoung Woon ; Han, Seong Kuk ; Kim, Choong Gon ; Shin, Hyun Gon ;
Journal of the Korea Organic Resource Recycling Association, volume 22, issue 1, 2014, Pages 27~34
demand for a low-cost treatment technology is high because the sewage sludge has an 80% or higher water content and a high energy consumption cost. This study apply the thermal hydrolysis reaction that consumes a small amount of energy for sludge treatment. The purpose of this study is to quantify the viscosity of sewage sludge according to reaction temperature. we measured continuously the torque of dewatered sludge by the reaction temperature. As the reaction temperature increased, the dewatered sludge is thermal hydrolysis under a high temperature and pressure. Therefore, the bond water in the sludge cells comes out as free water, which changes the dewatered sludge from a solid phase to slurry of a liquid phase. The results of the viscosity measurements according to the reaction temperature showed that the viscosity was very high at
at a temperature of 293K, but rapidly decreased with increases in the reaction temperature to
at a temperature of 400K and to
at a temperature of 460K or higher, similar to the changes in the viscosity of water. And we was obtained the viscosity function of boundary condition for the optimal design of thermal hydrolysis reactor by numerical modeling based on the this results.
Proposition of Green Star for the Practice of Rio+20, and Application of Four Rivers Project
Koo, Ja-Kong ; An, Hyo-Won ;
Journal of the Korea Organic Resource Recycling Association, volume 22, issue 1, 2014, Pages 35~39
The world has been interested in sustainable development and to be considered important the three values(Environmental Integrity, Economic Growth, Social expandability) of sustainability. Rio+20 conference was attention to "Green Economy", trying to solve for sustainable development. But Rio+20 proposed "The Future We Want", They can't solve it and it is regret. Also It is judged that Only three values of sustainability are limited to sustainable development. Five values; Green Star is suggested the answer for "The Future We Want". Four Rivers Project verified by Green Star, Green Star proposed new paradigm for sustainable development. And Expect the strong well-being country of Korea.
An Analysis of Local Quantity of Carbon Absorption, Fixation and Emission by Using GIS
Kim, Hyeon-Tae ; Moon, Byeong-Eun ; Choi, Eun-Gyu ; Kim, Chi-Ho ; Ryou, Young-Sun ; Kim, Jong-Goo ;
Journal of the Korea Organic Resource Recycling Association, volume 22, issue 1, 2014, Pages 40~48
Due to increasing greenhouse gas emissions, global warming and abnormal weather phenomena it has become important on a national level to keep a count of greenhouse gases being emitted. We want to take advantage of any selected area, as the basic data for the calculation of greenhouse gas emissions, Forest and Grassland, Paddy fields, and Fields(crops), Greenhouse(crops), Pig farm, Cattle farm, Farm household(populations, agricultural machinery) and Vehicle, the basic building blocks shots with a small amount of per-unit basis, the statistics calculated based on regional carbon emissions through the literature and experimental. Carbon absorption 772,960 ton C/year, amount of fixation 487,477 ton C/year, amount of emission 1,112,607 ton C/year were noted in Gimje-si, and amount of carbon absorption 55,559 ton C/year, amount of fixation 25,864 ton C/year, amount of emissions 58,355 ton C/year in Gongdeok-myeon, respectively. The carbon absorption at Hwangsan-ri is 25,107 ton C/year, fixation 4,301 ton C/year, and emission 20,330 ton C/year respectively. We were able to estimate the amount of carbon according to the specific characteristics of each unit village, then expanding it to a large-scale and comparative analysis, therefore we were able to obtain basic data on the national levels of carbon absorption.
Biodegradation Characteristics of Swine and Cattle Using Anaerobic Batch Tests
Kim, Jung-Kwang ; Choi, Jae-Min ; Kim, Jae-Yoon ; Park, Joon-Kyu ; Lee, Chae-Young ;
Journal of the Korea Organic Resource Recycling Association, volume 22, issue 1, 2014, Pages 49~56
This study was conducted to investigate the biodegradation characteristics of swine and cattle using anaerobic batch tests. The results showed that the maximum methane production rate(
) and acclimation time(AT) of swine were 46.7 mL
VS.d and 17.2 d, respectively. The
and AT of cattle were 56.5% and 24.0% lower than those of swine. The characteristics of anaerobic biodegradation varied with livestock species but
and AT increased linearly with the content of lipid. The
and AT of cattle with content of lipid were more sensitive than those of swine.
Effects of Mixing Ratios of Cow Manure and Composting Bulking Agent on Physico-Chemical Characteristics and Earthworm (Eisenia foetida) Survival
Hwangbo, Soon ; Jo, Ik-Hwan ;
Journal of the Korea Organic Resource Recycling Association, volume 22, issue 1, 2014, Pages 57~66
The present study was conducted to provide basic data for environmentally friendly treatment of manure using vermicomposting. This was done by investigating the influence of physiochemical property change during the composting period on the survival of earthworms after mixing cow manure in different levels (0(CRH0), 10(CRH10), 20(CRH20), 30(CRH30), and 40%(CRH40)) with the rice hull that is generally added for composting manure. As composting proceeds, earthworms were able to survive in all conditions after 3 weeks. In terms of the C/N ratio by treatment groups, the rice hull mix treatments were significantly higher than the CRH0 treatment. Among rice hull mix treatments, the treatments with 30~40% rice hull level (CRH30 & CRH40) showed the highest ratio out of all composting periods (p<0.05). The C/N ratio in the 3rdweek when earthworms started surviving was 23.26~34.44. As composting progressed, pH and electrolytic conductivity (EC) were the highest in the CRH0 treatment (p<0.05) and tended to decrease with higher proportion of rice hull in the mix. It was found that pH and electrolytic conductivity (EC) that earthworms start to survive are 7.58~7.74 and 0.41~1.17 mS/cm, respectively. To summarize, when composing cow manure with various levels of rice hull mix, all physiochemical property changes turned out to allow the survival of earthworms, but the results suggest that efficient vermicomposting requires the tests to examine the growth and reproduction according to the rice hull mix ratio.