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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
Effect of food waste properties on methane production
Lee, Soo Gwan ; Choi, Hong Lim ; Lee, Joon Hee ;
Journal of the Korea Organic Resource Recycling Association, volume 22, issue 3, 2014, Pages 11~22
The buffer capacity of food waste lowers during the collecting and transportation period. Food waste usually shows deficiency of micro nutrients especially molybdenum(Mo) and cobalt(Co). Therefore, food waste can be considered as a good mixture of livestock waste to enhance methane production. The objective of this study was to investigate the correlation between properties of substrates (local food waste and livestock manure) and methane yields for successive anaerobic fermentation process and its stable management. Food wastes were taken at an intermediate storage or treatment system provided by eight local authorities (Gangnam, Gangdong, Gwanak, Guro, Dongjak, Songpa, Yeongdeungpo, and Younsan) in Seoul. The solid content and potential methane yield of food wastes were average of 16% and
(range from 334.8 to
) respectively. As for the beef cattle manure, the solid content and potential methane yield had an average of 26% and
respectively. Potential methane yield had a positive correlation with fat content, and hydrogen content and a negative correlation with carbohydrate content (
). Therefore, the potential methane yield can be predicted based on the substrate characterization results with reasonable accuracy. Further research may be needed to investigate the relation of the properties of the mixture substrate and methane production rate. The mixtures may include food waste, livestock waste, and bulking agents (saw dust, rice hull, or agricultural byproducts etc.) to determine best combination of these substrates for maximum methane production rate.
Solid-liquid Separation Characteristics of Membrane Filter Press according to Coagulant Properties of Anaerobic Digestion Waste Water
Han, Seong Kuk ; Jung, Hee Suk ; Song, Hyoung Woon ; Kim, Ho ; Ahn, Dae Hyun ;
Journal of the Korea Organic Resource Recycling Association, volume 22, issue 3, 2014, Pages 23~32
Recently, it is increase in the processing of organic waste using anaerobic digestion. Therefore, the studies on the processing method for increasing the anaerobic digestion waste water. But it is very difficult to solid-liquid separation, because the characteristics of anaerobic digestion waste water. So this study evaluate solid-liquid separation efficiency of anaerobic digestion sludge using CST(Capillary Suction Time), TTF(Time to Filter). To address this problem, a membrane filter press of the lab scale was produced and the anaerobic digestion wastewater was applied to it. Polymer coagulants were found to be most suitable 7192PLUS and 1T60, It is necessary to minimum injection concentration is 7192PLUS (200 mg/L), 1T60 (100 mg/L). To evaluate dehydration efficiency, it was measured the moisture content of the dehydrated cake and suspended solids of decanted water. As a result, showed that a high removal efficiency of 97.4% when the solid-liquid separation using the membrane filter press. And the moisture content of the dehydrated cake was less than 65%.
Nitrogen Transformation in Soil Cooperated with Organic Composts and Bio-char During Corn (Zea mays) Cultivation
Shin, JoungDu ;
Journal of the Korea Organic Resource Recycling Association, volume 22, issue 3, 2014, Pages 33~40
This study were conducted to evaluate the N mineralization and nitrification rates and to estimate the losses of total carbon and nitrogen by runoff water in soils cooperated with organic composts and bio-char during corn cultivation. For the experiment, the soil texture used in this study was clay loam, and application rates of chemical fertilizer and bio-char were
) as recommended amount after soil test and 0.2% to soil weight. The soil samples were periodically taken at every 15 day intervals during the experimental periods. The treatments were consisted of cow compost, pig compost, swine digestate from aerobic digestion system, and their bio-char cooperation. For N mineralization and nitrification rates, it was shown that there were generally low in the soil cooperated with bio-char as compared to the only application plots of different organic composts except for 47 days after sowing. Also, they were observed to be highest in the application plot of swine digestate from aerobic digestion system. For loss of total carbon by run-off water, it was ranged from 1.5 to
in the different organic compost treatment plots. However, Loss of total carbon with bio-char could be reduced at
in PC treatment plot. Also, with application of bio-char, total nitrogen was estimated to be reduced at 4.2 (15.1%) and
in application plots of pig compost and swine aerobic digestate, respectively.
A study on the parameters for biodegradable characteristics of sewage discharged intermittently
Han, Gee-Bong ; Lee, Young-Sin ;
Journal of the Korea Organic Resource Recycling Association, volume 22, issue 3, 2014, Pages 41~52
In this study, to estimate the biodegradability of sewage discharged intermittently, field scale sampling and analysis was conducted and the results were obtained as follows. According to results of the biodegradability of sewage discharged intermittently, average concentration of TCODcr is 325.5mg/L and ratio of TCOD fraction resulted 100%. Also, average concentration of SCODcr resulted 135.9mg/L and ratio of TCOD fraction resulted 41.8%. Average concentration of Ss showed 74.1mg/L and ratio of TCOD fraction resulted 22.8%. Average concentration of
was analyzed to be 61.8mg/L and ratio of TCOD fraction was calculated to 19.0%. Xs which is particulate matter was analyzed to show 27.8mg/L and ratio of TCOD fraction also showed 8.5%. Average concentration of
is 103.4mg/L and ratio of TCOD fraction resulted 31.8%. Inert particulate matter showed that average concentration of
is 58.5mg/L and ratio of TCOD fraction resulted 18.0%. Accordingly, dissolved biodegradable organic matter showed the ratio of 41.8%, and readily biodegradable matter among this showed 22.8%. Thus intermittent inflow is expected to have less effect with regards equalization by organic loading rate of influent.
The study of sewage sludge moisture content and composition analysis for sewage sludge dryer
Lee, Keon Joo ;
Journal of the Korea Organic Resource Recycling Association, volume 22, issue 3, 2014, Pages 53~59
In this study, the sewage sludge dryer is installed before and after dehydration of the sludge and aqueous phase composition, the heavy metal content, and measurement and analysis were investigated. The removal efficiency of water content of sewage sludge was about 95.7% in the sewage sludge dryer. The removal efficiency of water content for primary dryer was designed for 35% of primary drying, secondary drying to remove the water content to 10%, but as the measurement revealed that 20.8% of primary drying, the second dryer 3.3% a better effect to the actual operation respectively. Before the installation of the sewage sludge dryer, the content of heavy metal was as follows, Cu:352~614 ppm, Hg: 1.3~1.44ppm, Cd : 1.1~1.86ppm, Pb : 17.25~ 28.93 ppm, As : 1ppm. And after the installation of the sewage sludge dryer, the content of heavy metal changed to as follows, Cu : 340~350 ppm, Hg : 0 ppm, Cd : 0~0.021 ppm, Pb : 0 ppm, As : 0~0.043 ppm which is Also below the legal limits. Also, the sewage sludge dryer produce 1/4 of the sewage sludge into dried sludge.
The Performance Evaluation of the Exhaust Stack used in High Riser Public House
Kwon, Yong-Il ; Kim, Ung-Yong ; Shin, Hyun-Gon ;
Journal of the Korea Organic Resource Recycling Association, volume 22, issue 3, 2014, Pages 60~67
Exhaust system used in toilet and cooking place of high riser public house is roof fan of two basic types : natural roof ventilator and natural/forced roof ventilator. Natural/forced roof ventilator has a motor in the rotary shaft. There are many high riser public house in Korea. These buildings were not viewed as being major contributors to exhaust pollutants producted in indoor. It was because many engineers thought that exhaust in high riser building depend on stack effect. This study investigates on stack pressure determined by exterior pressure and the difference pressure control in exhaust stack used in high riser public house. This paper focuses mainly on the effect of the time interval for power supply of motor installed in roof fan with function of natural wind velocity and of exhaust air volume of toilet. It is observed there are higher exhaust efficiency than the existing natural roof ventilator.
The Study of the Need to Remove Soluble nitrogen (
) Generated from Anaerobic digestor Retrofitted in Municipal Wastewater Treatment Plants
Ahn, Seyoung ;
Journal of the Korea Organic Resource Recycling Association, volume 22, issue 3, 2014, Pages 68~75
Soluble nitrogen produced from anaerobic digestor is able to have a strong influence on the effluent water quality of municipal wastewater treatment plants during a winter season in particular. The modeling results using the GPS-X simulation software shows that the soluble nitrogen concentration generated from the anaerobic digestor is 214.1 mg/L in the return flow and 6.2 mg/L in the inflow of the primary settler higher than those in nonexistence of the anaerobic digestor, respectively. In the case of using a separation process (flotation thickener) in order to treat the return flow from the sludge treatment system, the soluble nitrogen concentration in the effluent from the separation process and in the inflow of the primary setter could be 6.0 mg/L higher and 0.7 mg/L lower than those of nonexistence of the process, respectively. The modeling results propose the need of the equipments to be able to remove the soluble nitrogen (
) produced from the digestor in the improvement projects of anaerobic digestor in municipal wastewater treatment plants.