응집, MAP 결정화 및 MBR을 이용한 슬러리 돈사폐수의 처리

임경호,류승재 공주대학교 생산기술연구소 2002 論文集 Vol.10 No.-

The object of this study was to develop the new process for the treatment of swine wastewater which is made of solid/liquid separation process, MBR and R/O. Also, to suggest optimum design and control parameters for these processes lab scale reactor system was operated during 60 days with several batch-test. At first, the proper polymer type and optimum dosage for solid/liquid separation of swine manure generated from the slurry feedlot were KP-208BH which possess a positive charge and 50 ∼ 70 mg/L, respectively. The optimal reaction conditions of MAP-Crystallization 15 ∼ 20 munutes of reaction time and 2:1:2 for molar ratio(Mg:N:P) at pH 8 ∼ 8.5. As the result of operating a continuous livestock-wastewater treatment system, the reactor with 0.25 kg COD_Cr/kg MLSSㆍday and 0.036 kg TKN/kg MLSSㆍday showed the best removal efficiency of COD and TKN. Also, it turned out that HRT has to be kept for more than 1.5 days to get the stable organic removal efficiency. The effluent of MBR was mostly composed of nonbiodegradable materials which causes color with the concentrations of COD_Cr and NO_3-N of 1,500 ∼ 2,600 mg/L and 800 ∼ 1,000 mg/L, respectively. It is undesirable quality of effluent to be applied directly to the R/O process. Accordingly, the research of the advanced treatment processes to remove color from the effluent of MBR process might be needed near the future.

복숭아나무 경지삽목 시기와 Mulching 재료가 포장 활착에 미치는 영향

林敬鎬,金月洙,林根喆,金光秀 전남대학교 농업과학기술연구소 2000 農業科學技術硏究 Vol.35 No.-

This experiment was studied to examine the effect of cutting time, mulching materials and soil water contents on field establishment of hardwood cutting of 'Sunaga Wase' peach. The most adequate time for hardwood cutting was found to be from early February to middle February, transplanting on mid to late March showed higher field establishment. Therefore the sooner cutting, the better field establishment. Black and clear-black-stripe polyethylene film showed higher field establishment because mulching materials at transplanting time play a important role to control the changes of soil temperature and moisture contents affecting field establishment.

복숭아나무 硬枝揷木時 揷木 用土와 基間이 發根과 圃場活着에 미치는 영향

林敬鎬,林炯基,金道翊,金月洙,鄭淳柱 全南大學校 農業科學技術硏究所 1998 農業科學技術硏究 Vol.33 No.-

복숭아나무 경지삽목 번식에 있어서 삽목 용토와 기간 및 삽수내 저장 양분 함량 변화 등이 발근과 포장 활착에 미치는 영향을 구명하였다. 삽목 용토는 vermiculite가 peat pellets 岩線보다 발근율, 발근수와 발근장 및 포장 활착율 등에 있어서 가장 좋은 효과를 나타냈다. 삽목 기간은 35일에서 55일로 기간이 길어질수록 발근율이 높고 뿌리 발달이 좋아졌으나, 포장 활착율은 삽수내전탄수화물과 전당 등 전당 등 저장양분 소비가 많아 삽목 기간이 짧은 35일에서 높았다. 특히 이들 양분 중에서 sucrose의 소비가 가장 많았다. 포장에서 활착후 수고, 간경 등 생육은 모든 처리에서 수고 136㎝, 간경 22.9㎜ 이상으로 삽목 당년에 우량묘가 생산되었다. This experiment was studied to examine the effect of cutting media and duration on rooting and transplanting using hardwood cutting of 'Sunaga Wase' peach to establish mass production system of rooted cutting. In cutting media, vermiculite showed higher root growth than peat pellets and rock-wool on rooting, root number, root length, and survival in field. The longer cutting duration was from 35 to 55 days, the better rooting and root growth obtained. But the transplanting was the best at 35 days, because it held enough storage nutrient including carbohydrate and sugar which were consumed in cutting stem tissue of 'Sunaga Wase' peach during hardwood cutting. Especially, among these nutrients, sucrose showed the highest consumption. After transplanting of rooted cutting to field, tree height and diameter of ' Sunaga Wase' peach was 136㎝ and 22.9㎜, respectively. therefore it could product the best quality of rooted cutting.

칼슘제 수관살포가 참다래의 과실 품질과 저장에 미치는 영향

임경호,나양기,임동근,마경철,조윤섭,김월수,이상현,박용서 全南大學校 農業科學技術硏究所 2001 農業科學技術硏究 Vol.36 No.-

This study were carried out to improve Kiwifruit quality and storage life. Three kinds of calcium compound were sprayed and calcium content of fruits, weight loss during fruit storage and fruit quality were investigated. Calcium contents within leaves and fruit were lower in Clef-non treatment than that of control. The calcium content in fruit pericarp of Kalk-H and CaCl2 was 0.04 to 0.05% higher than that of control. Fruit weight and soluble solids content at harvest was a little higher but acidity and fruit hardness was lowered. Fruit weight loss of Kalk-H and CaCl2 treatment was 1.39 to 1.53% lower than that of control during storage. The soluble solids of ripen fruit was 1.0 to 1.3% higher in all treatment and 0.8% higher in Kalk-H treatment in 120 of after storage. Fruit hardness of control fruit was higher at harvest but that of CaCl2 treatmented fruit was 0.39㎏/φ 5㎜ higher in 120 days of storage.

AUSB 반응조에서 Ca+²이온의 농도가 슬러지 입상화에 미치는 영향

임경호 公州大學校工科大學生産技術硏究所 1996 論文集 Vol.4 No.-

Aerobic upflow sludge blanket (AUSB) process is a new biological wastewater treatment method applying the concept of the self-immobilization to activated sludge. In this study, Ca+² ion concentration effects on the sludge granulation and the stability of the AUSB reactors were investigated experimentally. For this purpose, two sets of AUSB system with different Ca+² ion concentration of 0 ㎎/L (R1) and 100 ㎎/L (R2) were operated for high-rate treatment of synthetic wastewater. Both the BOD removal efficiency and stability in R2 were higher than the R1 at the loading rate up to 2.25 ㎏/㎥·day. In R1, the long multicellular filaments causing bulking were prevalent in the granule, while the overgrowth of filamentous organisms in R2 was prevented with appropriate Ca+² ion concentration and resulting in higher MLSS density. It is believed that stable operation at high concentration of Ca+² ion is possible due mainly to accumulation of high density sludge granules in the reactor. The granules were 0.5∼2.5 ㎜ in diameter and mainly consisted of rod-shaped bacteria and filamentous organisms, which were thought to be Sphaerotilus natans, Thiotrix sp. and Beggiatoa.

급속여과공정의 진단과 개선

임경호,박영오,배병욱 공주대학교 방재연구센터 1998 공주대학교 방재연구센터 논문집 Vol.2 No.-

Rapid sand filters in water treatment plants(WTP) is one of the most important step in order to remove fine particle including pathogens such as Criptosporidium and Giardia. Filters should be assessed based on their capability to achieve a treated water quality of less than 0.1 ntu on a continuous basis to ensure the integrity of the filtration process as a viable barrier in the treatment schme. This is less than the 1.0 ntu standard, but operation of filters to produce filterd water quality confidence that pathogens are being removed prior to the last barrier, disinfection. In this study, to optimize existing filtraiton unit process, rapid sand filteres-woking in S-WTP were evaluated for various factors. The results of comprehensive performance evaluation were followings. From the filter media analysis, effctive size and uniformity coefficient of media was 0.90~1.0 mm and 1.44~1.47, respectively. Therefore, the replacement of media is needed to optimize filter performance. Media loss was caused by air binding in the filter ed and improper operation of backwashing process. The ratio of the water used for filter washing to the amount of filtered waster was 2.5~3% curing the winter and 1~2 % in the summer. At teh beginning of a filter run, filtered water turbidity was over 0.5 ntu during about 20 min. Shorter filter run lengths was attributed to an overabundance of filter clogging algae(Synedra sp), air binding, and too much floc in the filter influent.

음악적성검사 개발을 위한 기초연구

임충기,박경자 서원대학교 교육대학원 2000 교육논총 Vol.4 No.-

This was done to find optimal conditions of musical aptitude test as a preliminary study for developing such test. In this study. five considerations might be suggested as follows. First. an united concept about musical aptitude needs to be established through professional musician's theoretical judgements and empirical studies such as factor analysis. Second, test materials need to be adopted from musical context itself rather than from simple mechanical sounds. Also, it is necessary that test contents should include musical sensitivity and musical preferences Third. in developing musical aptitude tests, a paradigm needs to be changed from indirect measurement to direct measurement. Fourth, considerations on measurement characteristics such as reliability, validity, standardization should be emphasized. Fifth, it is necessary to develop our own musical aptitude test which is appropriate to our cultural background.

AGNPS 모델을 이용한 담수호 유입 오염부하량 산정

임경호,김종오 7개 국립대학교 환경연구 논문집 공동발행 위원회 2001 환경연구논문집 Vol.1 No.1

The monthly pollutants loads from nonpoint sources were estimated in Susan A·B watershed using a distributed watershed model, AGNPS(agricultural nonpoint sources) and unit load method. It was estimated that about 66∼84% of annual nonpoint source load would be discharged during 4 months from June to September, when a rainy reason in Korea. Especially during August and September with the highest monthly rainfall, about 44∼73% of nonpoint source load would be discharged into lakes. This study indicates that present annual average approach should not be adequate to estimate the waste loads from the nonpoint sources in Korea due to the high seasonal variation of rainfall. Therefore, it is suggested that the temporal nonpoint loads should be estimated based on the amount of rainfall for the pollution load allocation analysis in Korea.

복숭아나무 揷穗의 크기와 저장양분의 發根과 圃場活着에 미치는 影響

林敬鎬,金炳三,黃仁澤,金月洙,金光秀,金相喆 全南大學校 農業科學技術硏究所 1998 農業科學技術硏究 Vol.33 No.-

복숭아나무 경지삽목 번식에 있어서 삽수 굵기와 길이 및 삽수내 저장 양분 함량이 발근과 포장활착에 미치는 영향을 구명하였다. 삽수 굵기는 直徑 5∼8㎜의 삽수가 발근율이나 발근수, 발근장 등 뿌리 발달이 좋았으나 포장 활착율은 삽수재 저장양분이 많은 직경 8∼11㎜가 좋았다. 삽수 길이는 20∼30㎝ 처리가 발근율, 발근수, 발근장 등 발근력이 좋았으나 포장 활착율은 삽수재 잔존 저장 양분이 많은 30㎝ 길이가 좋았다. 삽목용 적정삽수는 8㎜ 굵기에 30㎝ 길이가 가장 효과적이었으며 포장에서 활착후 묘고, 간경 등 생육은 모든 처리에서 116㎝ 이상, 20.4㎜ 이상으로 삽목 당년에 우량묘가 생산되었다. This experiment was studied to examine the effect of cutting size and storage nutrient on rooting and survival in field using hardwood cutting of 'Sunaga Wase' peach to establish mass production system of rooted cutting. Cuttings having 5 to 8㎜ in stem diameter showed the best rooting percentage, root number and root length. In the survival in field, the stem diameter of 8 to 11㎜ showed the highest survival rate and less consumption of storage nutrient during cutting. Those hardwood cuttings of 20 to 30㎝ in stem length showed the best rooting, and higher survival in field was obtained in 30㎝ long cuttings. After transplanting rooted cuttings to field, tree height and trunk diameter of 'Sunaga Wase' peach was 116㎝ and 20.4㎜, respectively.

복숭아 품종별 경지 삽목에 있어서 삽수기부의 Wounding이 발근 및 활착에 미치는 영향

林敬鎬,金炳三,金月洙,羅良基,鄭淳柱 전남대학교 농업과학기술연구소 2000 農業科學技術硏究 Vol.35 No.-

The effect of wounding method on rooting and field adaptation was studied in 'Sunaga Wase' peach and several cultivars in order to establish mass production system of rooted cutting. Rooting was more than 90% in 'Sunaga Wase', 'Kurakata wase', 'Wolbongjosaeng' and 'Wolmijosaeng', and Root number, weight and length showed similar tendency, however, taking root in field was the highest, as much as 75.8% 'in Sunaga Wase'. Modified wounding tool (MWT) was more effective than current method because rooted cutting with MWT showed high root growth including rooting, root number, root weight and saved wounding time.