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REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
> Journal Vol & Issue
Journal of the Korea Organic Resource Recycling Association
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Journal DOI :
Korea Organic Resource Recycling Association
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Volume & Issues
Volume 24, Issue 2 - Jun 2016
Volume 24, Issue 1 - Mar 2016
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Effects of Acid Modification on Pb(II) and Cu(II) Adsorption of Bamboo-based Activated Carbon
Lee, Myoung-Eun ; Chung, Jae-Woo ;
Journal of the Korea Organic Resource Recycling Association, volume 24, issue 1, 2016, Pages 3~10
DOI : 10.17137/korrae.2016.24.1.3
Effects of acid (
and HCl) modification on the adsorption properties of Pb(II) and Cu(II) onto bamboo-based activated carbon (BAC) were investigated through a series of batch experiments. The carbon content increased and oxygen content decreased with acid treatment.
induced carboxylic acids and hydroxyl functional groups while HCl added no functional group onto BAC. The pseudo-second order model better described the kinetics of Pb(II) and Cu(II) adsorption onto experimented adsorbents, indicating that the rate-limiting step of the heavy metal sorption is chemical sorption involving valency forces through sharing or exchange of electrons between the adsorbate and the adsorbent. The equilibrium sorption data followed both Langmuir and Freundlich isotherm models. The adsorption capacities of BAC were affected by the surface functional groups added by acid modification. The adsorption capacities were enhanced up to 36.0% and 27.3% for Pb(II) and Cu(II), respectively by the
modification, however, negligibly affected by HCl.
Furrow Covering Effects with Rice Straw on Nutrient Discharge from Upland Soil Used for Red Pepper Cultivation
Hong, Seung-Chang ; Kim, Min-Kyeong ; Jung, Goo-Buk ; So, Kyu-Ho ;
Journal of the Korea Organic Resource Recycling Association, volume 24, issue 1, 2016, Pages 11~19
DOI : 10.17137/korrae.2016.24.1.11
Excessive application of nutrient supplement on the upland soil may increase the amount of discharge to surrounding water systems. The chemical fertilizer (CF), cow manure compost (CMC), and pig manure compost (PMC) are used as a nutrient supplement for cultivation of red pepper. Rice straws are widely used as a soil covering material in order to reduce weed occurrence, to protect soil moisture, and to supply organic matter in upland soil. This study was conducted to evaluate the furrow covering effect with rice straw on nutrient discharge in upland soil used for red pepper cultivation. The experimental plots of nutrient supplement were consisted of CF, CMC, and PMC and the amount of nutrient application were as recommended amount after soil test for red pepper cultivation. Each nutrient supplement treatment plot has no furrow covering (CFC) as a control and furrow covering with rice straw (FCS), respectively. Furrow covering with rice straw (FCS) of CF treatment and CMC treatment reduced the amount of T-N(total nitrogen) discharge by
, respectively, compared to control. While the amount of T-P(total phosphorus) discharge of the furrow covering with rice straw of CF, CMC, and PMC increased by
, respectively, compared to control. The phosphorus and nitrogen content of straw were 0.4 % and 0.3 % respectively. In addition, in three week the phosphorus was eluted from the straw which soaked in distilled water. Thus, it was assumed that T-P discharging originated from rice straw which applied as a furrow covering material. The furrow covering with rice straw reduced weed occurrence compared to control. But production of fresh red pepper was not influenced significantly by furrow covering with rice straw. In conclusion, excessive furrow covering with rice straw could induce T-P discharge from upland soil used for red pepper cultivation. Further studies are needed to evaluate the appropriate amount of rice straw as a furrow covering material.
Anaerobic Co-Digestion Characteristics of Food Waste Leachate and Sewage Sludge
Lee, Suyoung ; Yoon, Young-Sam ; Kang, Jun-Gu ; Kim, Ki-Heon ; Shin, Sun Kyoung ;
Journal of the Korea Organic Resource Recycling Association, volume 24, issue 1, 2016, Pages 21~29
DOI : 10.17137/korrae.2016.24.1.21
We mix food waste leachate and sewage sludge by the proportion of 1:9, 3:7 and 5:5. It turns out that they produced 233, 298 and 344
of methane gas. The result suggests that as the mixing rate of food waste leachate rises, the methane gas productions increases as well. And more methane gas is made when co-digesting sewage sludge and food waste leachate based on the mixing ratio, rather than digesting only sewage sludge alone. Modified Gompertz and Exponential Model describe the BMP test results that show how methane gas are produced from organic waste. According to the test, higher the mixing rate of food waste leachate is, higher the methane gas productions is. The mixing ratio of food waste leachate that produces the largest volume of methane gas is 3:7. Modified Gompertz model and Exponential model describe the test results very well. The correlation values(
) that show how the results of model prediction and experiment are close is 0.92 to 0.98.
The Treatment of Source Separated Food Waste by Mesophilic Anaerobic Digestion System with Leachate Recirculation
Cho, Chan-Hui ; Lee, Byonghi ; Lee, Yong-Woon ;
Journal of the Korea Organic Resource Recycling Association, volume 24, issue 1, 2016, Pages 31~40
DOI : 10.17137/korrae.2016.24.1.31
In this study, mesophilic anaerobic digestion of source separated food waste was carried out by leachate recirculation system and methane gas was produced. Two systems - system A and B were fabricated and placed within water bath to maintain
. Each system was comprised of an anaerobic bioreactor and a leachate tank. Leachate in bioreactor was separated through the screen located at 30 mm above the bottom and a pump was installed to transfer collected leachate to the leachate tank. Everyday, 2.5 L of the leachate was pumped from the bioreactor to the leachate tank for 30 min and transferred leachate was pumped back to the top of the bioreactor for 30min, sequentially. Source separated food waste used for this experiment was washed by water before transferring to the laboratory. Transferred food waste was warmed to
before being fed to bioreactors. System A was fed to 49.1 g VS (Volatile Solids) and System B was fed to 54.0 g VS at every two weeks, respectively.
and salinity were monitored to see the inhibition toward anaerobic bioreaction and it was found that concentrations of these materials were not high enough to affect the bioreaction. Although the food waste was fed biweekly for 112 days and 140 days at system A and B, respectively, there was no sludge withdrawal from each system. Average methane productions rates were 0.439 L
VS and 0.368 L
VS for system A and B, respectively.
Study on the Public Food Waste Recycling Facility Operation (I) - Focusing on the Current State of Operation and the Problems -
Hong, Yong-Pyo ; Kim, Hye-Sun ; Kim, Ung-Yong ; Shin, Hyun-Gon ;
Journal of the Korea Organic Resource Recycling Association, volume 24, issue 1, 2016, Pages 41~49
DOI : 10.17137/korrae.2016.24.1.41
This study is conducted to find out problems of the public food waste recycling facility and its improvement. Through a research on the actual condition, it is possible to analyze the problem of operation. Moreover, for this improvement, with analysis of the current state of recycling rate including its generation and the problem that can be shown from the real operation of the public/private food waste recycling facility, the results are as follows: It can be shown that the current amount of domestic food waste resource recycling is about 97 %. Almost every public recycling facility is analyzed to be economically infeasible and is not for recovery but to simple disposal. Especially, most of Biogas facilities appeared that amount of production and demand is not appropriate differed from enforcement design.
Study on the Public Food Waste Recycling Facility Operation (II) - Focusing on Improvement Plan -
Hong, Yong-Pyo ; Kim, Ung-Yong ; Shin, Hyun-Gon ;
Journal of the Korea Organic Resource Recycling Association, volume 24, issue 1, 2016, Pages 51~57
DOI : 10.17137/korrae.2016.24.1.51
This study is conducted to find out the problems of the public food waste recycling facility operation and its improvement. In order to save the national budget by analyzing plans to expand including operation rate for the food waste recycling facility, the alternative ways are suggested. The result can be as follows: Policy switch is required not only to save budget and stable disposal of food waste but also to promote resource recycling rather than expanding public facilities. In order to change the policy for stable and eco-friendly disposal of food waste, it is necessary to adopt semipublic system that prevent the decline of the rate of operation of private resource recycling facility. Furthermore, it is required to prepare both qualified technologies of public resource recycling and the ways of profitability secure.
Removal of Ammonium and Nitrate Nitrogens from Wastewater using Zeolite
Kim, Choong Gon ;
Journal of the Korea Organic Resource Recycling Association, volume 24, issue 1, 2016, Pages 59~63
DOI : 10.17137/korrae.2016.24.1.59
The objective of this study lies in identifying the applicability of zeolite for the removal of wastewater ammonium and nitrate nitrogens. To this end, the author tracked adsorption variations as seen with the adsorption removal of wastewater ammonium and nitrate nitrogens. As a result, it was indicated that the maximum adsorption of zeolite acting on the adsorption removal of ammonium nitrogen would reach 120mg/g (weight of ammonium nitrogen divided by that of zeolite), and that Langmuir adsorption isotherm explained the adsorption of ammonium and nitrate nitrogens better than Freundlich adsorption isotherm. This means that zeolite makes ion exchanges with adsorbate for unilayer adsorption. It was also indicated that the removal efficiency of ammonium nitrogen with varying pH would be higher in the order of pH7 > pH5 > pH9 > pH3.