Seaweed by-products have been dumped into the sea and induced marine pollution. However, they can be recycled as a valuable natural resources. Approximately 240,000 tons of sea mustard and kelp by-products were estimated to be producted during the last three years. The estimate corresponds 6.7% of the total production of marine aquaculture and 14.9% of the total production of seaweeds. When adding up the by-products from fish and mollusks, approximately 1,000,000 tons of fisheries by-products were thrown out into the sea every year. A three-step strategy is required for the industralization of fisheries by-products. The first step is the construction of the processing foundation of by-products, the second is its food industralization, and the third is its recycling as raw biomaterials. The stable supply of raw materials is the prerequisite for the industralization. Thus, it is necessary to construct the refuse logistics around chief production districts and to build the processing facility and frozen storage of by-products. Cooperation among private enterprises and government investment for research and development is required the second and third steps.

본 연구에서는 하수처리유출수의 유기물 성상을 제어하기 위해 서로 다른 흡착제를 적용하여 역삼투막의 막오염 경향성을 관찰하였다. 실험실 규모에서 역삼투막 운전결과, 다중벽탄소나노튜브 (5%), 팽창흑연 (21%), 하수처리유출수(25%), 활성탄 (26%) 순서로 초기대비 투과수량이 감소하였다. 형성된 막오염 물질의 FEEM 분석결과, 활성탄의 경우 팽창흑연, 다중벽탄소나노튜브, 하수처리 유출수에 상대적으로 높은 미생물유래물질에 의한 막오염이 존재하였다. 더 나아가, 분자량 분석 결과를 통해 고분자 미생물유래물질(>15K Da)의 영향이 큰 것을 확인하였다. 결과적으로, 하수재이용공정에서 고분자 미생물유래물질이 역삼투막 효율저하의 주요한 역할을 하며, 이를 저감시키기 위한 방안마련이 필요하다고 판단되었다.

In this study, various physical cleaning methods such as physical washing and osmotic backwash, were performed to understand membrane fouling characteristics by employing real secondary wastewater effluent (SWWE). In addition, microfiltration (MF) and ultrafiltration (UF) pretreatments were compared to maximize removal of organic matter and to control membrane fouling efficiently. Organic foulants deposited on the active layer of FO membrane were observed by fouling behavior test. The relationship between concentrations of natural organic matter and membrane fouling was also investigated from the bench-scale FO tests. Finally, by quantitative analysis of correlations between foulants and fouling reversibility with the modified fouling index (MFI), we identified the applicability of MFI in predicting FO intake water fouling potential.

인구구조 및 생활방식 등의 변화로 물 소비는 증가되고 있는 반면, 가뭄 등 기후변화로 가용수자원 여건은 악화되고 있어 안정적인 용수공급의 필요성이 증대되고 있다. 우리 정부는 물의 재이용 촉진 및 지원에 관한 법률을 제정하고 하수처리수 재이용, 중수도, 빗물이용 등 지속가능한 물 순환을 추진하며 지역적 물 부족을 해소하기 위하여 노력하고 있다. 정부는 물 재이용 관리체제를 강화하고 시설기반을 구축하는 한편 관련 산업 육성과 전문인력 양성을 위해 노력해 왔다. 하지만 국내 물 재이용은 여러 가지 정책⋅재정⋅기술적 한계로 인해 계획대비 더디게 진행되고 있어 물 재이용 방향성의 재정립이 필요하다. 이에 본 발표를 통해 물재이용의 방향에 대하여 하수처리수 재이용을 중심으로 제언하고자 한다.

Internet communication technology has encouraged social services and media industry to develop in various aspects. Web drama is one of them, which is characterized by mobility, immediacy, and personality, and provided with popular contents regardless of time or place. In addition, it includes various themes such as work, romance, thriller, zombie, and homosexuality. This study aims to examine what web drama characteristics affect consumer behavior. Data was collected from university students in south korea. who are main viewers of web drama. The respondents to this study consist of random sample respondents from college students in their 20s. A total of 200 samples were surveyed, and a voluntary participant. The data are analyzed by the SPSS 21.0. Short running time, convenience, contents diversity, accessibility, review, and grade are defineded as characteristics of web drama. Acording to the analysis of data. Web drama characteristics have a positive impact on reuse intention. Consumer engagement mediates the relationship between web drama characteristics and reuse intention. PPL moderates the relationship between web drama characteristics and reuse intention. The results of this study are expected to provide both the researchers and marketing practitioners with the framework to understand why and how web drama works on watching intention.

The main purpose of this research is to explore the effects of usage frequency on the intention to reuse membership service while having perceived value play a role as a mediator. Usage frequency of membership services can affect consumers' fairness judgment. The more opportunities consumers have to perceive the fairness of a service, the more likely it is that they will choose to receive the identical service from the same provider in the future, since they form a positive attitude toward the service. In addition, the perceived value of the consumer can lead to the reuse of the service because it gives satisfaction to the consumer. Another objective of this research is to examine the moderating effect of regret and guilt on the relationship between perceived value and the intention to reuse membership service. Consistent with regret literature, if consumers perceive a consumption value that is smaller than the initially expected consumption value when using a membership service, they will regret the use of the service. Further, negative emotion such as regret often lead to negative attitudes and behaviors of consumers. Thus, as consumers feel regret, their willingness to use the membership service will continue to decrease. On the other hand, consumers experience guilt when they benefit from an unfair process (Krehbiel and Cropanzano, 2000). Similarly, when consumers judge that they have exceeded the usage frequency of membership service based on social norms or ethical principles of individuals, they will perceive unfairness. Consumers may try to offset their negative emotion by continuing to use identical membership services even after the end of the contract period as compensation for their guilty feelings. Thus, as consumers feel guilt, their willingness to use the membership service will continue to increase. This study proposes practical implications that a firm operating a membership service program can encourage a positive response of consumers in their service process by theoretically identifying the intrinsic process related to consumers' intention to reuse the service.

하수처리 혐기성 유동상 생물반응기(Anaerobic Fluidized Bed Bioreactor : AFBR)는 높은 표면적을 갖는 입상활 성탄을 유동 메디아로 적용함으로써 생물막 형성 및 유지에 유리하며 이로 인해 우수한 유기물 제거 효율을 나타내나 처리된 유출수 내의 질소와 같은 영양염류의 잔존이 여전히 문제로 남아있다. 본 연구에서는 AFBR에 의해 처리된 유출수 내의 질소 배제를 위하여 정삼투막(FO membrane)을 유도용액의 종류와 농도에 따라 적용하였다. 실험결과 유출수의 총질소 배제 효율 은 FO막에 적용하는 유도용액(draw solution : DS)의 종류 및 농도에 크게 의존하였다. 유도용액 농도가 증가함에 따라 FO막의 수투과량이 증가하였으며, 1 M의 NaCl을 유도용액으로 사용한 경우 총질소 배제 효율은 55%이었으나 1 M의 glucose를 유도용액을 사용한 경우 거의 완벽한 총질소 배제 효율을 나타내었다. AFBR 유출수를 FO막으로 24시간 동안 여과를 진행하 였으나 파울링에 의한 수투과량의 감소는 관찰되지 않았다.

본 연구에서는 이산화탄소 포집 및 물 재이용을 위한 통합 시스템으로서 정삼투 공정의 적용 가능성에 대한 평가를 수행하였다. 해당 통합 공정은 이산화탄소 배출 저감을 위해 화력발전소에 적용되고 있는 습식 이산화탄소 포집설비에 정삼투 기반 공정을 추가함으로써 이산화탄소 포집뿐만 아니라 물 재이용 및 냉각수 생산을 동시에 달성할 수 있다. CO2를 흡수한 5M의 모노에탄올아민(습식용매)을 유도용액으로 적용한 결과 40 LMH (FO mode) 및 85 LMH (PRO mode)라는 매우 높은 수투과도를 얻을 수 있었다.

The Anaerobic fluidized bed bioreactor (AFBR) treating synthetic wastewater to simulate domestic sewage was operated under GAC fluidization to provide high surface area for biofilm formation. Although the AFBR achieves excellent COD removal efficiency due to biological activities, concerns are still made with nutrient such as nitrogen remaining in treated wastewater. In this study, FO membrane was applied to treat the effluent produced by AFBR. Removal efficiency with total nitrogen (TN) was investigated with draw solution (DS, NaCl) and hydrodynamic condition (i.e., recirculation flow rate) along FO membranes. Permeability of FO membrane increased with increasing DS concentration. About 85% of TN removal efficiency was observed with the FO membrane using 1 M of NaCl DS. During operational period of a day, no permeate flux decline was observed.

In this study, various physical cleaning methods such as physical washing and osmotic backwash, were conducted to understand membrane fouling properties by employing real secondary wastewater effluent (SWWE). In addition, microfiltration (MF) and ultrafiltration (UF) pretreatments were compared to maximize removal of organic matter and to control membrane fouling efficiently. Organic foulants deposited on the active layer of FO membrane were observed by fouling behavior test. The relationship between concentrations of natural organic matter and membrane fouling was also investigated from the bench-scale FO tests.

본 연구는 노인주간보호시설(day care center)의 서비스 품질이 이용자의 재이용 의사에 미치는 영향 과, 이용자 만족도의 매개효과를 규명하고자 한다. 이를 위해 서울권 노인주간보호시설 이용자 200명을 대상으로 설문조사하였고, 그 중 유의미한 설문지 183부를 회수하여 분석하였다. 노인주간보호시설 서 비스 품질을 독립변수로, 이용자 만족도를 매개변수로, 이용자의 재이용 의사를 종속변수로 설정하여 빈도분석, 상관분석, 매개영향분석 및 다중회귀분석을 실시하였다. 연구결과 서비스 수준은 재이용에 영 향을 미치지 않았고, 과정품질이 재이용에 가장 높은 영향을 미치는 것으로 나타났다. 또한, 과정품질 다음으로 결과품질이 재이용에 큰 영향을 미치는 것으로 나타났다. 이 같은 연구결과에 비춰봤을 때 노 인주간보호시설의 서비스를 발전시키기 위해선 (1) 종사자들에 대한 교육･훈련 및 처우개선, (2) 관련 법 제의 정비와 개선이 필요할 것으로 보인다.

This study surveyed the recognition, image, preference, attributes, satisfaction and revisit intention for Korean food of local Vietnamese to facilitate the globalization of Korean food. Most participants had recognized Korean food. and, they were especially aware of kimchi (김치), bulgogi (불고기) and bibimbab (비빔밥), Additionally, most repondents thought these foods represent Korean traditions and culture very well. The image of local Vietnamese for Korean food was good. Which was reflected in Korean food having “a good reputation” and a high possibility for “globalization” were high. This study also investigated 16 kinds of Korean food and found the highest preferences to be for bulgogi (불고기), followed by galbitang (갈비탕), whereas that for doenjangchigae (된장찌개) was lowest. Some of the top choice attributes of Vietnamese for Korean food were found to be in “because it is ‘colorful’, ‘prepared sincerely’, ‘plated neatly’, ‘fresh’ and ‘comes with a variety of banchans (side dishes). This is a very meaningful result, making this an important reference for the globalization of Korean food. The local Vietnamese had high satisfaction and reuse intention degree for Korean food, and especially high satisfaction with the colorfulness of Korean food. In addition, the local Vietnamese showed a very high revisit intention for Korean food.

(주)에코니티에서 개발한 자유말단형 분리막모듈(End-Free type)은 기존 분리 막 모듈과는 달리 고농도의 MLSS(Mixed Liquor Suspended Solids) 에서도 지속적인 운전이 가능하며, 그 외 다양한 현장 문제 발생 시에서도 쉽게 대응이 가능하여 안정적으로 운영이 가능한 특징을 가지고 있다. 본 연구에서는 (주)에코니티 자유말단형 분리막의 MBR(Membrane Bioreactor) 장기 운전 성능을 평가하였다. 운영을 하는 동안 발생하는 이벤트에 대한 해결 방안을 확인하면서 최적의 운전조건을 검토하였다. 또한 하수처리수가 재이용으로 적용되는 시스템에서 MBR 처리수가 역삼투 멤브레인의 원수로 공급되는 만큼 안정적이며 양호한 수질이 생성되는지 지속적으로 검토하였다.