Porous Materials: Energy‐Efficient Dehumidification over Hierachically Porous Metal–Organic Frameworks as Advanced Water Adsorbents (Adv. Mater. 6/2012)

Seo, You‐,Kyong,Yoon, Ji Woong,Lee, Ji Sun,Hwang, Young Kyu,Jun, Chul‐,Ho,Chang, Jong‐,San,Wuttke, Stefan,Bazin, Philippe,Vimont, Alexandre,Daturi, Marco,Bourrelly, Sandrine,Llewelly WILEY‐VCH Verlag 2012 Advanced Materials Vol.24 No.6

<P>The energy‐efficient dehumidification over hier‐archically porous metal‐organic frameworks (MOFs) with hydrothermal stability is reported on page 806 by Jong‐San Chang and co‐workers. Their promising water sorption properties lead to a new type of advanced water adsorbents for the effective utilization of low‐grade thermal energy as well as solar energy. These MOFs would be potential alternatives to commercial water adsorbents, which are used for industrial or indoor desiccant applications such as desiccant dehumidifiers/humidifiers, gas dryers, adsorptive air‐conditioning systems, fresh water production, and adsorption heat transformation. </P>

지렁이를 이용한 슬러지 안정화시 부하율의 영향 및 슬러지 종류별 안정화 가능성 검토

서성철,박종안,이노섭,배형석,이종화,허준무,김준현 순천향대학교 기초과학연구소 1997 순천향자연과학연구 논문집 Vol.3 No.2

Stabilization of organic sludges using earthworms was conducted in a laboratory to investigate the effect of feed rate on the vermistabilization, and feasibility of vermistabilization of various sludge was also carried out to further wider application of vermistabilization. Sludges used in this study were septic tank sludge, papermill sludge and brewery sludge. Sludge reduction, cast production, earthworm growth rate and cocoon production were monitored periodically to check degree of stabilization. Feed rate of septic tank sludge did not have a notable effect on the sludge reduction and cast production per unit weight or earthworm. There was also no difference in the earthworm growth rate per unit weight of the sludge removed among the different sludge feed rate. The amount of septic tank sludge, papermill sludge and brewery sludge per gram of earthworm per day were 0.06, 0.05, and 0.02g, respectively. The weight of increase of earthworm per unit weight of the sludge removed was 0.18g/g for the septic tank sludge, 0.21g/g for the papermill sludge, and only 0.06g/g for the brewery sludge. It was therefore concluded that brewery sludge was not suitable for vermistabilization mainly due to high organic content to be easily converted organic acid. The concentrations of several heavy metals, volatile solids, total organic carbon and total kjeldahl nitrogen in the cast were generally lower than those in the raw sludges.

Jet Loop 반응기를 이용한 화학비료폐수의 생물학적 질소제거 연구

서종환,이철승 한국환경과학회 2005 한국환경과학회지 Vol.14 No.2

This study was conducted to determine optimum design parameters in nitrification and denitrfication of chemical fertilizer wastewater using pilot plant, Jet Loop Reactor. The chemical fertilizer wastewater which contains low amounts of organic carbon and has a high nitrogen concentration requires a post-denitrfication system. Organic nitrogen is hydrolyzed above 86%, and the concentration of organic nitrogen was influent wastewater 126㎎/L and of effluent wastewater 16.4㎎/L, respectively. The nitrification above 90% was acquired to TKN volumetric loading below 0.5 ㎏TKN/m² d, TKN sludge loading below 0.1 ㎏TKN/㎏VSS·d and SRT over 8days. The nitrification efficiency was 90% or more and the maximum specific nitrification rate was 184.8 ㎎TKN/L·hr. The denitrification rate was above 95% and the concentration of NO₃^(-)-N was below 20㎎/L. This case was required to 3 ㎏CH3OH/㎏NO₃-N, and the effluent concentration of NO^(-)₃-N was below 20㎎/L at NO₃^(-)-N volumetric loading below 0.7 ㎏NO₃-N/m o d and NO₃^(-)-N sludge loading below 0.12 ㎏NO₃^(-)-N/㎏VSS·d. At this case, the maximum sludge production was 0.83 ㎏TS/㎏T-N_(re) and the specific denitrfication rate was 5.5 ㎎NO₃-N/ gVSS·h.

폐비닐여재를 적용한 부착성장식 공법의 유기물 및 영양염 제거 특성

서종환,김진우,안철우,이철승,박진식,김수생 동아대학교 환경문제연구소 2003 硏究報告 Vol.25 No.2

This study was carried out to demonstrate the removal characteristics of organic materials & nutrients in attached growth process applied Synthetic Wasted Polyethylene Media which is reused from wasted vinyl in rural. The results are as follows: 1. Removal efficiencies were indicated COD_(cr), 91.4, 92.4, 93.9%, T-N 56.9, 61.4, 65.1% and all T-P 45% or more with HRT 10, 12, 14 respectively. 2. It is indicated BOD volume load 0.18~0.40kg/ ㎥ ·d, COD volume load 0.28~0.53kg/ ㎥ ·d and NH₄-N volume load 0.12kg/ ㎥ ·d respectively. In conclusion, It is showed activated sludge process is replaced with this process applied Synthetic Wasted Polyethylene Media and this process is considered the methods that solve wasted vinyl troubling in a rural.

자연정화공법에 의한 인공습지 하수처리장에서 최적 수생식물의 선정

서동철,장병일,조인성,임석천,이홍재,조주식,김홍출,허종수 한국환경농학회 2006 한국환경농학회지 Vol.25 No.1

유기물부하가 낮은 하수의 전단탈질공법에 의한 탈질방안

이철승,서종환,김진우 한국환경과학회 2004 한국환경과학회지 Vol.13 No.9

This study was conducted to analyze the operating conditions of predenitrification process to improve the treatment efficiency in low organic loading sewage plant in use today, and to investigate the treatment efficiency of pilot plant added night soil as well as the nitrogen removal characteristics of pilot plant added carbon sources. In the operation under the condition of BOD_(5) sludge load 0.03-0.28kg BOD_(5)/kg VSS/d and oxic ammoniac nitrogen sludge load 0.02-0.24 kgNH₄^(+)-N/kg MLVSS/d, nitrification efficiency is higher than 95%. In order to achieve 70% nitrogen removal at the T-N sludge loading 0.06kg T-N/kg VSS d and the SRT 6-11 days, optimum operating factors were revealed to CODc_(r)/T-N ratio 9, recycle ratio 2.6, and denitrification volume ratio 0.33. At this time, denitrification capacity was approximately 0.09 kg NO₃^(-)-N/kg CODc_(r); specific nitrification rate was 3.4mg NH₄^(+)-N/g MLVSS/hr; and specific denitrification rate was 4.8mg NO₃^(-)-N/g MLVSS/hr.

재발성 류마티즘 환자에서 발작의 유발인자

주유철,이동민,양종태,신병철,임태영,서정균,정기영,최동헌,김원,조영신,고희관 조선대학교 2001 The Medical Journal of Chosun University Vol.26 No.2

Background and Objectives : Palindromic rheumatism (PR) is known to be triggered without any obviously inciting events in most patients, although, in a few cases, attacks have been noted to relate to another events such as weather change, childbirth, ingestion of certain foods, or over-exercise. The aim of this study was to characterize the triggering factors on palindromic attacks. Materials and Methods : We evaluated sixty-four patients with PR for the presence of triggering factors and the relationship between attacks and triggering factors by interview of patients. We considered that there was an probable association between episodes and PR, if episodes within 24 hours prior to PR had triggered at least 50% of all attacks and a definite association between episodes and PR, if episodes within 24 hours prior to PR had triggered 100% of all attacks. Results : In 15 patients (35.9%), there was a possible association between episodes of PR and initiating events. In 8 patients (12.5%), there was a definite association between episodes of PR and initiating events. The triggering factors were physical over-activity including exercise (19/64: 29.7%), foods, such as rawfish, crab, and chicken, including alcohol (19/96: 19.8%). However, there were no difference between the groups with and without the triggering factor in sex ratio, duration and onset of PR, the positive rate of rheumatoid factor and involved sites. Conclusion : Our observations showed that PR was triggered by physical over-activity more than in previous reports and hypersensitivity to foods was a causative factor in some patients with PR. However, patients with triggering factors had a similiar clinical profile to patients without triggering factors.

DHA의 미세캡슐화와 산화방지에 관한 연구

한성철,류종서,이기영,김도만,최춘순 全南大學校 觸媒硏究所 2003 觸媒硏究 論文集 Vol.24 No.-

We studied the oxidation of docosahexaenoic acid(DHA: C22: 6ω-3). β-Cyclodextrin(CD) inclusion complexes(ICs) of DHA were prepared with antioxidant such as α-tocopherol and BHT, and microcapsulated with Curdlan and Pullulan. Identification of their structural features of ICs were observed with the use of SEM, FTR, and XRD. Methods for quantitative analysis of DHA were used: TLC scanning method and TBARS(Thiobarbituric acid reactive substance) method. As a result, we observed the formation of ICs and estimated antioxidant effect. In this work, loading efficiency of DHA in ICs was about 25%, and the antioxidant effect of α-tocopherol was higher than that of BHT. When ICs containing DHA was microcapsulated with curdlan and pullulan, the loading efficiency was less than 5%.

족관절 염좌에서 근주용 Prioxicam의 임상효과 : An open non-Comparative Trial

인주철,안종철,김세동,안면환,서재성 최신의학사 1988 最新醫學 Vol.31 No.11

NaOH 첨가에 따른 음식물찌꺼기 고온 혐기성 산발효

안철우,이철승,서종환,박진식,문추연,장성호,김수생 한국환경농학회 2004 한국환경농학회지 Vol.23 No.4

본 연구는 음식물찌꺼기의 혐기성 산발효에 있어 여러 조건들 중 온도가 효율적인 가수분해와 산발효에 미치는 영향을 검토하기 위해 고온(55℃)과 중온(35℃)에서 각각 실험을 수행하여 다음과 같은 결론을 얻을 수 있었다. 음식물찌꺼기의 혐기성 산발효시 산생성 효율을 높이기 위한 전처리 과정으로 음식물찌꺼기에 NaOH를 투입한 결과 가수분해효율을 표현한 가용화 정도(Solubilization)가 0.01 g NaOH/g TS이하로 투입된 경우 0.01 mgSCOD_(prod)/mgICOD_(inf)이하를 나타내었으나, 0.05 g NaOH/g TS이상을 투입했을 때는 0.07~0.09 mgSCOD_(prod)/mgICOD_(inf)로 나타났다. 따라서 음식물찌꺼기에 NaOH를 투입하여 효율적인 가수분해가 이루어지기 위해서는 g TS당 0.05 g이상의 NaOH가 투입되어야 할 것으로 판단된다. 음식물찌꺼기를 NaOH로 전처리한 후 고온(55℃) 산발효를 실시했을 때 0.05 g NaOH/g TS 투입시 SCOD의 증가치 3,800 mg/L로 최대의 가용화와 산생성에 효과적인 pH 5.95를 얻을 수 있었다. 0.05 g NaOH/g TS를 투입하여 중온(35℃)에서 산발효를 실시한 경우와 비교하여 SCOD 증가치가 약 5배 정도 높았고, 최대 가용화에 이르는 시간도 중온의 2/3 정도로 짧아 음식물찌꺼기의 가용화에는 고온이 효과적인 것으로 나타났다. NaOH 0.05 g NaOH/g TS로 전처리된 음식물찌꺼기의 산발효 결과 고온(55℃) 및 중온(35℃)에서 각각 반응시작 후 72시간에 12,600 mg/L, 120tlrksdp 9,800 mg/L의 VFA농도를 나타내어 동일기질을 이용하여 산발효를 실시했을 때 중온보다는 고온에서 미생물의 활성증대와 유기물의 가수분해가 촉진되어 VFA생성이 효율적인 것으로 판단되었다. 고온에서 NaOH에 전처리된 음식물찌꺼기를 산발효 시켰을 때 VFA가 가장 높았던 시점을 기준으로 VFA의 조성을 조사한 결과 acetic acid가 45.9%, butyric acid가 26.7%, propionic acid가 13.9% 등으로 총 유기산 발생량의 86.5%를 차지하였다. This study showed that thermophilic anaerobic acid fermentation of food wastes had an enhanced hydrolysis capability and improvement of acidification efficiency. Influence of pH on the anaerobic hydrolysis and acidogenesis was investigated to determine the proper alkalinity in the thermophilic fermentation of food wastes. The results of putting NaOH as alkali to evaluate hydrolysis and acid fermentation efficiency in acid fermentation process of food wastes showed that the food wastes pretreated with 0.05 g NaOH/g TS had the maximum 12,600 mg/L of VFAs concentration during HRT 3 days in 55℃ hermophilic condition and the maximum 9,700 mg/L of VFAs concentration during HRT 5 days in 35℃ mesophilic condition. The accomplishment of high VFAs concentration resulted from that the main component of food wastes such as cellulose, lignin and etc. is performed active chemical decomposition by alkali in thermophilic condition. The major components of VFAs produced from the thermophilic acid fermentation process of food wastes were the short chain fatty acids such as acetic acid, butyric acid, and propionic acid.