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韓國産 대나무類의 化學的 成分調査에 관한 硏究 (第1報) 智異山 갓대의 組成分析에 對하여
辛東韶,鄭泰明 진주농과대학 1962 진주농과대학 연구논문집 Vol.- No.1
1. 갓대의 年齡別에 따른 各組成分이 一般 竹類의 그것과 가까운 傾向을 나타내지 않았다. 水分은 竹類에 있어서 1年生이 大體로 많은데 供試材 갓대는 그렇지 않았다. 2. 全갓대를 通하여 그의 特徵은 灰分이 많음과 同時에 1年生이 많았다. 3. 갓대의 冷水 및 溫水抽出物은 年齡別에 따라 各各 달랐고 日本産 Sasa 보다 어느 것이든 그 量이 조금 많았다. 1% NaOH 抽出物은 木材나 대나무에 비해 많은 것이 特徵이다. Alcoho-Benzene 抽出物은 年齡間 平均 5.20%이 었다. 4. 갓대의 重要成分中 年齡別 Cellulose는 大差가 없었고 全體的으로 Lignin의 量이 比較的 적었다. 5. 粗蛋白質은 2年生과 3年生이 同等하였고 1年生이 많은 값을 갖이고 있다. 木材 0.7∼1.0% 前後에 比하면 갓대가 平均的으로 많은 것이다. There is no report on the chemical components of bamboo produced in Korea. First of all, we investigated the kat-tae (Sasa-amorpha chiisanensis Nakai) grown in the College Experimental Forest which is located in Samjang-myun, Sanchun-gun, Kyungsangnam-do. Up to date, the kat-tae is little used and is regarded as a kind of obstacle in the way of silviculture and forest management, and as yet we have scarcely done any research in connection with it. It is a real factor that the growing stock and increment of kat-tae is comparable with bamboo, so can be valuable for meeting the scarcity of pulp and fibre materials. Realizing the above mentioned facts, it is important to research into the chemical compositions of kat-tae as a matter of utilization. The method of analysis employed was the wood analyses. The time in which kat-tae was obtained was Nov., 9, 1961, from the above said place, and the number of samples was 90 specimen of kat-tae from first, second, third years each. The portion of the culm from which was taken is the part of 20-40cm from the ground. After air-drying, 60-80 mesh fraction is used for analyses. Results obtained are shown in table 10. The values given are averages of two or five analyses. 1. The composition of kat-tae between ages does not have a similar tendency to that of bamboo. One-year old of bamboo is generally rich in moisture content, while, in case of kat-tae, the moisture content of three-year old was higher than that of one-year old in the samples tested after being air-dryed. 2. The ash of the kat-tae is characterized by the facts that its value is much higher in comparition with bamboo, at the same time the value of one-year old kat-tae is much more than the two or three-year old. 3. The cold water and hot water extractives vary from one-year old to three-year old, as are shown in table 10. The high content of solubility in 1% NaOH is characteristic os kat-tae, compared with wood and bamboo. The alcohol-benzene extractives contain average of 5.20% between ages. 4. It reveals no apparent differences by aging in the total cellulose value of kat-tae, where as their lignin content is less than that of wood and bamboo. 5. The protein value of 2-year old and 3-year old is approximately equal, but the one-year old has relatively high value. It is established that kat-tae is high in protein value compared with no less than 0.7-1.8 of wood.
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CROSS 공법을 이용한 폐수의 생물학적 처리에 관한 연구
박광하,심재도,권영두,강동수,김인호,정태명,황갑성 7개 국립대학교 환경연구 논문집 공동발행 위원회 2003 공업기술연구 Vol.3 No.-
This study aims to develop using a continuous removal of organic and settling solid(CROSS) to increase the efficiency of aeration system for wastewater treatment. To solve many problems of the conventional activated-sludge process, authors suggested a new CROSS model in conjunction with aeration systems in 1996. This system is characterized by utilizing an intensive aeration pipe with inlets at the lower portion and outlets at the higher portion in an aeration tank. Through the experiments on CROSS process, the average removal efficiences of BOD, COD_(Mn), SS, T-N and T-P were showed 98.8%, 93.9%, 98.0%, 71.3% and 49.8%. The average DO (Dissolved-Oxygen) concentration was constantly maintained at 8.0 mg/L by the intensive aeration which was accompanied by rapid reduction of BOD. Degradation of the organic matters in sewage then continued for the whole aeration period. The process demonstrated that it was very adaptive without seeding and returning the sludge. Compared to the activated sludge system, the system was very flexible for the continuous flow treatment. This preliminary assessment showed that the porous media in CROSS reactor is viable for the sewage treatment, since the porous media under the intensive aeration achieves acceptable effluent quality.
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이온교환수지를 이용한 농 · 어촌 지하수중의 질산이온 제거
유명진,권순국,정태명,김민석 한국환경농학회 1997 한국환경농학회지 Vol.16 No.2
본 연구에서 얻을 수 있었던 결과를 요약하면 다음과 같다. 1. 황산이온 농도를 포함해 원수의 음이온 농도가 낮은 경우 질산이온을 효율적으로 제거하기 위해 사용가능한 수지는 일반적으로 사용되는 Type 1수지보다도 공극형태가 gel 형태인 Type 2수지를 사용하는 것이 적절할 것으로 판단된다. 그러나 음이온 농도가 높은 지하수나 빠른 유속으로 처리할 경우 공극형태가 macroporous인 것이 유리할 것으로 판단된다. 또한 원수의 항산이온 농도가 낮은 경우에는 같은 macroporous 형태의 수지라도 IRA-900 같은 일반 형태의 수지가 질산이온 선택성 수지보다도 효율이 좋은 것으로 나타났다. 2. Type 2 수지를 사용하여 얻은 자료로 동력학적 접근 방정식에 적용하여 얻은 결과를 다중희귀분석한 결과 다음과 같은 식을 도출할 수 있었다. logq_0=-0.14logV-0.148logH-1.04(r=0.99) logM=0.135logV+0.151logH+1.814(r=0.99) 3. 황산이온 농도가 다소 높은 지하수를 처리할 때는 일반형태인 IRA-900보다도 질산이온 선택성 수지인 IMAC HP-555 수지가 효율이 좋은 것으로 나타나 원수의 황산이온 농도가 50㎎/ℓ 이상일 경우에는 질산이온 선택성 수지를 사용하는 것이 바람직할 것으로 판단된다. The purpose of this study was to find out a suitable resin to remove NO₃-N from groundwater. Four different commercial resins differentiated by type, porosity and nitrate selectivity were used to compare the performance of nitrate removal. Gel type, Type 2 anion exchange resin was preferable when anion concentration of raw water was low. But efficiency of this resin decreased as flow rate increased. However, macroporous type resins were not affected by increasing flow rate. Macroporous resins were preferable when anion concentrations in raw water were high and high flow rate was proposed. And the general type resin showed better efficiency when sulfate concentrations were low. However the nitrate selective resin had better efficiency in treating raw water of high sulfate concentration. From the results, it may be drawn that nitrate selective resins are preferable to general type when a sulfate concentration in groundwater is over 50㎎/ℓ.
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