http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
최용수,신응배,이영대 ( Yong Su Choi,Eung Bai Shin,Young Dae Lee ) 한국물환경학회 1995 한국물환경학회지 Vol.11 No.3
Experimental study for the removal of organic and phosphorus in synthetic wastewater was conducted in a single reactor including anaerobic-anoxic-aerobic zone and clarifier. Attempts were made to delineate phosphorus removal mechanisms and to evaluate the removal efficiencies of organic and phosphorus with different internal recycle ratios, N/P ratios and various SRT conditions. The removal efficiencies of TOC, BOD and COD were observed to be higher than 95%, 90% and 90% respectively with aerobic recycle rates of 100% and 200%. It was recognized that the optimal operational condition for phosphorus removal was the aerobic internal recycle rate of 100% with the inlet fraction 0.2. The percent removal efficiencies were 92.1% for T-P and 90.1% for PO-4-P. While, large differences in the removal of phosphorus with N/P ratios were observed; at influent TKN/T-P of 2.5, 3.6 and 5.1, removal efficiencies for T-P were 88.7%, 67.6% and 55.9%, respectively. Those removal efficiencies decreased with the increase of N/P ratio in wastewater charged. In case of SRT, removal rates of 93.5% for T-P and 92.1% for PO₄-P were observed with the solid retention time of l0 days. These rates are higher than results in 5 days and 20 days of SRT. Thus high removal efficiencies for organic substances and phosphorus in wastewater were simultaneously obtained by a new biological process with a single reactor.
03 구두발표 : 구두발표(OA) - 농업환경 및 토양,수질 분야 ; OA-03 : 사양토에서 왕겨 바이오차 시용에 따른 암모늄태 질소(NH4-N) 흡착특성 및 반응속도
최용수 ( Yong Su Choi ),김성철 ( Sung Chul Kim ),신중두 ( Joung Du Shin ) 한국환경농학회 2015 한국환경농학회 학술대회집 Vol.2015 No.-
Objective of this study was to investigate adsorption characteristic and kinetic model of NH4-N to biochar produced from rice hull in respective to mitigation of greenhouse gases. NH4-N concentration was analyzed by UV spectrophotometer. For the experiment, the soil texture used in this study was sandy loam, and application rate of chemical fertilizer and pig compost were 420-200-370 kg ha-1 (N-P-K) and 5,500 kg ha-1 as recommended amount after soil test for corn cultivation. Biochar treatments were 0.2-5% to soil weigh. Its adsorption characteristic was investigated with application of Langmuir isotherm, and pseudo-first order kinetic model and pseudo-second order kinetic model were used as kinetic models. Adsorption amount and removal rates of NH4-N were 39.3 mg g-1 and 28.0% in 0.2% biochar treatment, respectively. The sorption of NH4-N to biochar was fitted well by Langmuir model because it was observed that dimensionless constant (RL) was 0.48. The maximum adsorption amount (qm) and binding strength constant (b) were calculated as 4.1 mg g-1 and 0.01 L mg-1 in Langmuir isotherm, respectively. The pseudo-second order kinetic models was more appropriate than pseudo-first order kinetic model for high correlation coefficient (r2) of pseudo-second order kinetic model. Therefor, biochar produced from rice hull could reduce N2O by adsorbing NH4-N to biochar cooperated in sandy loam.
04 포스터 발표 : 토양 환경 분야(PS) ; PS-08 : 참나무 바이오차의 인산염 인(PO4-P) 흡착특성
최용수 ( Yong Su Choi ),홍승길 ( Seung Gil Hong ),김성철 ( Sung Chul Kim ),신중두 ( Joung Du Shin ) 한국환경농학회 2015 한국환경농학회 학술대회집 Vol.2015 No.-
Objective of this study was to investigate adsorption characteristics of PO4-P to biochar produced from oak tree in respective to reduce eutrophication from runoff water in cropland. PO4-P concentration was analyzed by UV spectrophotometer. For adsorption experiment, input amount of biochar was varied from 4 to 20 g L-1 with 30 mg L-1 PO4-P solution. Adsorption amounts and removal rates of PO4-P was increased at 33.3% in 4-14 g L-1, and increased at 28.6% in 4-16 g L-1, respectively. Adsorption characteristics of biochar were investigated with application of Langmuir isotherm. The maximum adsorption amount(qm) and binding strength constant(b) were calculated ad 0.1 mg g-1, and 0.1 L mg-1, respectively. The sorption of PO4-P to biochar was fitted well by Langmuir model because it was observed that dimensionless constant(RL) was 0.4. It was indicated that biochar is favorably adsorbed PO4-P because this value lie within 0<RL<1. Therefore, biochar produced from oak tree could be used as adsorbent for reduce eutrophication from runoff water in cropland.
고농도 질산성질소와 Ca<sup>+2</sup>을 함유한 산세폐수의 효과적인 처리를 위한 SBR 공정의 적용
김승준,최용수,배우근,Kim, Seung-jun,Choi, Yong-su,Bae, Woo-keun 한국물환경학회 2006 한국물환경학회지 Vol.22 No.2
This research presents results from laboratory and pilot-scale experiments to remove high-nitrate in pickling wastewater using the sequencing batch reactor (SBR) as a biological method. During the experimental periods, the influent concentrations of NOx-N and $Ca^{+2}$ were analyzed to be 350-1,600 and 700-800 mg/L, respectively. In order to provide carbon source for denitrification, methanol has been added in proportion to the influent nitrate loading. The mean concentrations of MLSS and MLVSS, the fraction of volatile solids in sludge and the sludge volume index were measured to be 27 g/L, 5 g/L, 18.5% and 7.5, respectively. The solid retention time was kept in the range of 18 to 22 days, specific denitrification rate ($U_{dn}$) was $0.301g{NO_3}^--N/gVSS/day$. The oxidized nitrogen concentration of effluent ranged 2-34 mg/L with an average of 5.2 mg/L, the overall reduction in total nitrogen was more than 99.2%. In order to treat the pickling wastewater including the high concentration of nitrate and $Ca^{+2}$, the continuous flow process is not suitable because the specific gravity of the sludge is considerably increased by $Ca^{+2}$, thus the SBR process is shown to be very effective to treat the pickling wastewater.
신중두,최용수,이선일,Shin, JoungDu,Choi, Yong-Su,Lee, SunIl Korea Organic Resources Recycling Association 2016 유기물자원화 Vol.25 No.3
바이오차 시용이 토양비옥도나 온실가스 완화에 기여하는 것 외에, 경작지 시용에 따른 탄소격리 및 순익 분석이 평가된바 거의 없다. 본 연구는 옥수수 재배 기간 동안 온실가스 완화에 대한 이익을 평가하고, 탄소격리를 산정하기 위해 수행되었다. 본 실험의 처리구는 돈분처리구, 돈분을 퇴비로 시용하면서 바이오차 처리를 2,600(0.2%), 13,000(1%), 및 26,000(2%) kg/ha로 나누어 시용하였다. 바이오차 시용에 따른 탄소 격리량을 예측하기 위해 Y = 0.5523X - 742.57 ($r^2=0.939^{**}$) 일차 모형식을 유도하였으며, 본 수식을 바탕으로 바이오차 0.2, 1 및 2% 시용 시 탄소 격리량은 각각 1,235, 3,978, 및 14,794 kg/ha로 산정되었고, 온실가스 완화는 각각 4.5, 14.6, 및 54.2 ton/ha로 평가 되었다. 이에 대한 이익 평가는 적게는 $14.6, 많게는 $452로 산정되었다. 또한 한국 기후변화 시장의 이산화탄소 시장 거래가로는 바이오차 0.2, 1 및 2% 시용 시 $35.6, $115.3 및 $428.2로 나타났다. 바이오차 시용에 대한 작물 재배에 있어, 초장과 수량은 처리간에 유의차가 인정되지 않았다. 따라서 본 실험결과는 농사활동에서 바이오차를 토양에 시용함으로서 탄소 배출건 거래제가 시행된다는 전제 조건하에 기초자료가 될 것이다. Despite the ability of biochar to enhance soil fertility and to mitigate greenhouse gas, its carbon sequestration and profit analysis with arable land application have been a few evaluated. This study was conducted to estimate carbon sequestration and to evaluate profit of greenhouse gas mitigation during corn cultivation periods. For the experiment, the biochar application rates were consisted of pig compost(non application), 2,600(0.2%), 13,000(1%), and 26,000(2%) kg/ha based on pig compost application. For predicting soil carbon sequestration of biochar application, it was appeared to be linear model of Y = 0.5523X - 742.57 ($r^2=0.939^{**}$). Based on this equation, soil carbon sequestration by 0.2, 1 and 2% biochar application was estimated to be 1,235, 3,978, and 14,794 kg/ha, and their mitigations of $CO_2$-eq. emissions were estimated to be 4.5, 14.6, and 54.2 ton/ha, respectively. Their profits were estimated at $14.6 for lowest and $452 for highest. In Korea Climate Exchange, it was estimated that the market price of $CO_2$ in corn cultivation periods with 0.2, 1 and 2% biochar application was $35.6, $115.3 and $428.2 per hectare, respectively. For the plant growth response, it was observed that plant height and fresh ear yield were not significantly different among the treatments. Therefore, these experimental results might be fundamental data for assuming a carbon trading mechanism exists for biochar soil application in agricultural practices.