• Korean Journal of Agricultural Science
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• v.19 no.2
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• pp.187-193
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• 1992

The effects of continuous restoration of sludge into the reclamating paddy soil and leaching test of sludge components by soil column were investigated. 1. The contents of nitrogen, phosphorus, potassium, C.E.C. and organic matter(O.M.) were increased in/on the paddy soil treated with paper mill sludge than non-treated. 2. Humic layer depth recognized by color showed the non-treated(10 cm), second year(15 cm) and third year(20 cm), respectively. 3. The effects of sludge treatment showed in the contents of O.M. such as non-treatment(0.9 %) < second year(1.39 %) < third year(1.75 %) in 10 cm depth. 4. All components in soil tested with column were increased by holding capacity of sludge, and the contamination effects of soil and ground water were not found by leaching test.

• Applied Biological Chemistry
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• v.38 no.3
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• pp.263-268
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• 1995

A study was undertaken to compare degradation patterns of carbofuran in soils between submerged and upland moisture conditions [$3-^{14}C$]Carbofuran was treated in each soils at the rate of 1.0 mg/kg (87.8 kBq $^{14}C/50g$ soil) and the time-course analysis for distribution of radioactivity and degradation products were conducted. Differences in the pathway and rate of carbofuran degradation in soils were observed between submerged and upland moisture conditiona major degradation being hydrolysis at 7-C position and oxidation at 3-C position, respectively. Carbofuran showed less persistence in soils of higher moisture contents A significant portion, $24{\sim}39%$ of the total radioactivity, resided in soils as nonextractable residues at 60 days after treatment The nonextractable radioactivity was mainly located in soil organic matter, fulvic acid, humic acid and humin factions Gel filtration chromatography confirmed the incorporation of carbofuran and its degradation products into the organic matter.

• Applied Biological Chemistry
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• v.31 no.2
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• pp.200-204
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• 1988

This study was conducted to evaluate effect of soil texture, organic matter, temperature and water regime on degradation of pretilachlor (2-chloro-2',6'-diethyl-N-(n-propoxyethyl) acetanilide) in the soils. The period of residual activity in soil treated with pretilachlor at rate of 60g a.i./10a was about 50 days. Also, period of reaching GR 50 value on the barnyard grass was about $25{\sim}27$ days. Degradation rate of pretilachlor in the sandy clay loam soil which has higher contents of organic matter and clay was faster than in the sandy loam soil. When organic matter was added to the soil, the rate of decomposition was accelerated. The faster degradation occurred under the $30^{\circ}C$ soil temperature by comparison under the $20^{\circ}C$. The rate of degradation in the soil was faster under the flooded conditions than under the wetted conditions.

• Proceedings of the Korea Water Resources Association Conference
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• 2016.05a
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• pp.591-591
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• 2016

최근에는 재이용을 위한 하 폐수의 처리 공정에 막을 이용한 기술적용이 증가되고 있는 추세이다(현 등, 2005). 막(membrane)을 이용한 수처리 공정은 원수에 상관없이 고도처리가 가능하며, 재이용수 이용 용도에 따른 수질제어가 가능할 뿐만 아니라 운용의 편리성 때문에 많은 각광을 받고 있다(박 등, 2004). 본 연구에서는 하수처리에 이용되는 분리막의 성능을 극대화하고, 분리막의 오염부하를 줄여주기 위하여 분리막 직전 전처리 시설로 부상방식의 고액분리장치를 개발하였다. 초고속 고액분리시스템은 기존의 응집부상공정을 응용한 기술로서 유기물의 응집시간을 최대 10초~2분 이내로 줄이는 기술을 바탕으로 타워형 모듈 형태로 개발하였다. 초고속 고액분리시스템과 분리막을 연계한 재이용수 수처리시스템의 성능 평가 및 현장적용을 위해 제주도 서부 하수 처리장에 일 $3,000m^3$ 규모의 Test-bed를 구축하였다. 구축된 하수재이용시스템의 처리 공정도는 "유입${\rightarrow}$고액분리시스템${\rightarrow}$분리막(UF, RO)${\rightarrow}$농경지 공급"으로 구성되어 있다. 먼저 하수처리장 방류수를 1차 유입조에 압송하면 전처리시설인 고액분리시스템을 통해 SS 등 입자성 물질이 처리되고, 다음 공정인 2차 처리공정(UF/RO)을 통과한 처리수는 인근지역의 농업용수로 공급되고 있다. 고액분리시스템은 ZT(Zeta Potential Tower) 모듈에서 유입수에 함유되어 있는 부유물질(SS), 유기물(질소, 인)을 응집제와 순간 반응시켜 응결, 응집, 부상방식으로 제거하는 공정이다. 고속 고액분리장치는 분리막 공정과 융 복합하여 다양한 유입수 성상에 따른 수처리를 가능하게 하여 재이용수 수질 향상뿐만 아니라 안정된 수자원 확보 측면에서 긍정적인 기술로 평가되었다.

• Korean Journal of Plant Resources
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• v.23 no.2
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• pp.138-144
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• 2010

This study was carried out to examine used as fertilizer on growth and yield of Gastache rugosa. The medicinal herbs('Yeonryeonggobondan') remnant which have prescriptions of high frequency by Korean was analyzed. The medicinal herbs remnant have high content of nitrogen, phosphoric acid, potassium and organic. The growth of Agastache rugosa by application of medicinal herbs remnants were more effective than that of control. As the amount of fertilizers were increased, plant height, stem diameter, number of leaves and number of branches were increased. The growth was the highest in the treatment of 30~50 g/pot. Weight of whole plant of Agastache rugosa has a tendency to be heavy in application of medicinal herbs remnant than that of control.

• Applied Chemistry for Engineering
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• v.22 no.2
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• pp.203-208
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• 2011

Dumping of wastes at sea will be strongly prohibited from 2012 by London Dumping Convention. So, finding the method for treatment of food waste at ground is needed urgently. The solution for above mentioned problem is the resource development from food waste leachate by using Upflow Anaerobic Sludge Blanket (UASB) process. In this research, we try to find out the effect of effluent recirculation and internal return influence on organic removal efficiency and biogas production. Laboratory investigation was conducted for 25 days with only internal recycling, and then, effluent recirculation was performed. As the result of experiments, the organic removal efficiency was above 90%, and the content of methane was 78~80% during operating time. Also, when UASB reactor was operated to over the 3 Q effluent recirculation, there was not 1 N-NaOH consumption any more, therethrough the experiment was economically and stably carried out.

• Journal of the Korea Organic Resources Recycling Association
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• v.13 no.3
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• pp.97-104
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• 2005

In this study, the change of water content, pH, and combustion weight on the decomposition of poly ester vinyl and high density poly ethylene were examined. The poly ester vinyl was degraded by microorganism in food wastes for 30 days, while high density poly ethylene vinyl was not degraded. Also, the poly ester vinyl was rapidly degraded after the 10 days of operation and its weight was decreased. In the combustion reaction between $300^{\circ}C$ and $600^{\circ}C$, complete combustion was performed. Due to the degradation of poly ester vinyl by microorganism in food waste, the pH was increased from 4.26 to 7.6. During of 60 days operation, poly ester vinyl was degraded over 90%.

• Journal of the Korea Organic Resources Recycling Association
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• v.13 no.2
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• pp.121-127
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• 2005

A heterotrophic nitrifying bacterium was isolated from the compost and analyzed for its characteristics. This bacterium was found to be a Gram positive rod, catalase positive, and motile. Nitrite production was detected on the ammonium acetate medium through the violet color formation. BBL test showed that this strain has high homology with Bacillus strains. Phylogenetic analysis using 16S rDNA revealed that the bacterium has 94% of similarity with Mycobacterium smegmatis strain.

• Journal of the Korea Organic Resources Recycling Association
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• v.21 no.4
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• pp.44-49
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• 2013

An establishment of dioxin-reduction operating skill for medium sized incineration facility is urgently needed in Korea with nearly 90% of medium sized incineration. Using lattice stoker incineration processing the capacity of 20 tons industrial general waste per day, similar properties of the household waste, dioxin-reduction is derived in optimum operating condition and parameters. As a result, CO haunting which is the minimization of frequency is found as the major parameter to minimize dioxin.

• Journal of the Korea Organic Resources Recycling Association
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• v.11 no.1
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• pp.101-101
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• 2003

본 연구는 남은 음식물을 유산균을 이용하여 발효 사료화 하기 위해 실시하였다. 발효를 촉진시키기 위한 균주로는 Lactobacillus acidophilus를 사용하였고 최적의 발효조건을 갖는 공기 주입량을 알아보기 위해 시료의 발효 조건을 각각 달리 하였다. 시료는 교반하지 않고 공기주입 또한 없는 혐기적 조건의 것과 50rpm의 속도로 교반하면서 0.25v.v.m의 공기를 주입한군, 70rpm의 속도로 교반하면서 0.5v.v.m의 공기를 주입한 군으로 나누었다. 시료는 모두 $37^{\circ}C$로 유지하면서 48시간 발효 시키며 12시간 단위로 시료를 채취하였다. p.H와 유기산함량, 환원당함량과 유산균수를 측정하여 남은 음식물을 발효시키기 위한 최적의 공기 주입량을 알아보았다. 실험결과 50rpm 0.25v.v.m에서 가장 낮은 p.H를 보여주었고 유기산 함량과 환원당 함량은 70rpm 0.5v.v.m에서 가장 높은 함량을 보였다. 유산균은 50rpm 0.25v.v.m에서 가장 많은 증식되었음을 보여주어 적절한 공기의 주입이 남은 음식물의 발효를 촉진하는 것으로 보여진다.