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축산폐수 처리시 연계처리 가능성과 미생물의 특성에 관한 연구
정팔진,현미희,김민정 전북대학교 공학연구원 ( 구 전북대학교 공업기술연구소 ) 2002 工學硏究 Vol.33 No.-
The livestock waste which contains a high concentration of nutrients was operated by aerobic digestion process and activated sludge process in order to observe the characteristics of biological N·P elimination. In addition, this result was different form that of municipal waste-water because of a complicated reaction caused by the characteristics of highly concentrated waste-water. After an aerobic process was operated for 15datys(HRT), NO3-N increased from 175 ㎎/L in influent to 980㎎/L in effluent and dissolved P increased from 51㎎/L in influent to 143㎎/L in effluent. Consequently, the treatment of P and N cause a big economic problem during the second-stage operation. When effluent which goes through an aerobic process in the second-stage operation is continuously treated by activated sludge, this effluent with or without O_3 contacts is experimented. The sample analysis was carried out by the class filter. The elimination rate of organic materials is not quite different form that of N·P due to the fact that the concentration of dissolved organic materials is very low, compared to NBD. However, the reactor is generally stable because its influent contacts with O_3 and there are a variety of microorganisms when they are observed through a microscope.
간헐 혐기·호기공법에 의한 축산폐수의 처리에 관한 연구
정팔진,김민정,현미희,정진필 全北大學校 附設 都市및環境硏究所 1996 都市 및 環境硏究 Vol.11 No.1
The livestock waste which contains a high concentration of nutrients was operated by the continuous operation and anaerobic·aerobic process in order to observe the features of biological N, P reaction. As the characteristics of the livestock waste and Aiksang Busic Liquid were studied, the basic data of an efficient development of Aiksang Busic Liquide were suggested through the problems in a real operation. During the handling of livestock waste, the eliminating tendency of organic substats in a reactor and anaerobic·aerobic process were steady as same as SCODcr and TOC. The efflent SCODcr 1,575㎎/ℓ decreased to 820㎎/ℓ in an aerobic reactor. In addition, 52.2% of the efflent was eliminated and this figure indicated that the biological matters having the potential decomposition were completely decomposed. While the livestock waste was being handled by anaerobic·aerobic process, "24hr track study" was performed to measure "release-uptake rate" caused by poly-P organisms. The result of this study was quite different form the studies done before. Total N and dissolved N were hot released and these concentration sharply decreased during the anaerobic period. On the other hand, these concentration increased during the aerobic period.
축산폐수와 하수의 혼합 처리 가능성 연구 : 오존처리를 중심으로 Focused on the effect of ozonation
정팔진,김민정,현미희 전북대학교 공업기술연구소 1997 工學硏究 Vol.28 No.-
Livestock waste may be one of the most troublesome wastes in terms of the complexity and operation of its treatment processes and its management on an administrative level. Treatability study for a mixture of sewage and the effluent from a semi-batch type of aerobic reactor treating raw livestock wastes was undertaken by using a bench scale activated sludge process. This approach was not successful due to excessively high effluent suspended solid concentrations over clarifier caused by a serious sludge bulking related with sphaerotilus natans. In order to control these filamentous microorganisms, the effluent of the treatment plant of livestock waste was ozonated prior to its mixing with a raw sewage and input to the aeration tank. Microscopic examinations show that preozonation was very effective in reducing the number of Sphaerotilus natans in the mixed liquor of aeration tank and thus producing better effluent qualities of the clarifier. The sludge settling tests for the mixed liquor were run in an one liter graduated cylinder of which the supernatants after 30 minute settling of the sludge were collected and its suspended solids concentrations were measured. The supernatant of activated sludge produced from thr preozonated inflow contained significantly less suspended solids than that without ozone treatment. Ozonation was found to slightly increase pH, soluble fraction of organic matters, calcium ions of the livestock waste influent. The operation of activated sludge process shows that it enhanced removal of organic matters as well as total phosphorus, which was an unexpected and interesting finding of this study. Also, preozonation improved the sludge dewaterabilities which might be due to coagulation effects of increased Ca^+2 concentration and reduction of filamentous bacteria in the sludge.
커피전문점의 문화 마케팅이 고객만족에 미치는 영향 : 제주도 카페를 중심으로
이진주,왕채연,현미희,한상호 한국프랜차이즈경영학회 2019 프랜차이즈경영연구 Vol.10 No.1
Purpose – Since the number of cafés operated by using cultural marketing in Jeju Special Self-Governing Province is increasing, this study emphasizes the necessity of cultural marketing, which is a different strategy of specialty coffee shops, focusing on Jeju Island. The purpose of this study is to investigate the effect of positive effects of service quality and brand image on customer satisfaction through cultural marketing. Research design, data, and methodology - It emphasizes the necessity of cultural marketing of specialty coffee shops, and how the positive effects of service quality and brand image brought through cultural promotion, culture support, cultural support, cultural enterprise influence customer satisfaction. The results of this study are as follows. In order to verify the research hypothesis of this study, Jeju residents who have experience using cultural marketing conducted in coffee shops in Jeju Island are targeted. The cafe in Jeju area, which runs from April 4 to April 14, 2018. A total of 110 copies of the questionnaire were distributed, and the final 100 copies were used as final empirical analysis data. Result – The results of the study are as follows. First, promotion and culture business activities have positive influence on brand image. Second, production and cultural business activities had positive effects. Third, brand image has a positive effect on customer satisfaction. Fourth, service quality has a positive effect on customer satisfaction. Conclusions – The implications of this study are following as: First, if you want to grow into a cultural enterprise in the province by enhancing your brand image, you need to prioritize cultural direction and business direction for cultural companies among sub-factors of cultural marketing. Second, it is necessary to improve the customer satisfaction through the improvement of the brand image considering the composition of the stores in the city, the facilities and the atmosphere, and the consumer tendency such as product and customer age.
Burkholderia cepacia를 이용한 축산폐수의 처리
정팔진,조선영,현미희,김민정,이은주,전민식 한국물환경학회 2004 한국물환경학회지 Vol.20 No.6
We found that the Bacterium Burkholderia cepacia in livestock wastewater treatment plant was predominant species. We investigated the growth rate of this and treatment characteristics for organic matter and nitrogen removal in livestock wastewater using this microorganism. First, we cultured B. cepacia. And then, to conducted treatment for livestock wastewater by using B. cepacia., we changed C/N from 0.2~4.4. When we operated A and B process, changing F/M ratio from 1.2 to 4.4. In experiment of C/N variations, when C/N was 1.8, we found that the optimal condition for organic matter and nutrient removal effect was higher and the removal efficiency of SCOD_(cr), SBOD_5, NH₄-N was 78.4%, 95% and 74.8%. So, It is possible to treat the wastewater having the lower C/N contents such as livestock wastewater using this microorganism. In experiment of A and B process for livestock wastewater, we found that the removal efficiency of organic matter and nitrogen in operating mode of A process was higher than that of B process. Also, the optimal F/M operating A process was 0.013 and the removal efficiency of SBOD_5, SCOD_(cr), TN and TP were 97%, 60%, 95% and 91%.
원찬희,정팔진,김민정,현미희,박정훈,송재환 전북대학교 공학연구원 ( 구 전북대학교 공업기술연구소 ) 2002 工學硏究 Vol.33 No.-
The entire duration of the research work was from December-2000 to July-2002. Site measurement were conducted during various season, in a dry season(December), in rainfall, in seed-sowing time and also collecting data from the rural public organizations related to water management was done and examined during the mid of research work. Generally, the Dong Jin River watershed contains small three Creeks, KoBu, DongJin(including JeongEup and ChilBo, WonPyong). It was further divided into 32 sub-watersheds which comprises of further 5, 18, 9 watersheds in the creeks respectively. Inflow loading to the river was calculated from measurement of general water quality and quantity and these field surveys were made thrice times in agricultural drainage channels, where fertilizers and pesticides leaching from the surface have an direct effect for the deterioration of the several creek and river. Estimation of contaminant loading has been done by using unit loading based on the notification No. 1999 - 143 of the Ministry of Environment. Most of estimated loading data reported during the research work were slightly higher when compared with the notification of the Ministry but they do not have any significant effect. It was assumed that sub-watersheds have considerable field survey loading data, which were affected due to non-point source pollution load as compared to point source. For investigation of surface rainfall ranging from .50㎜ during non-farming or .10 rainfall on the period of farming, BOD loadings in the field during farming showed slightly higher levels in comparison with discharge loadings, T-N also showed the similar trend as discussed earlier.