Fluidized bed granulation을 이용한 참기름의 저온 미세캡슐화

정찬민(Chan-Min Jeong),이민경(Min-Kyung Lee),이현아(Hyun-Ah Lee),박지용(Jiyong Park) 한국식품과학회 2009 한국식품과학회지 Vol.41 No.1

식품의 원료인 참기름을 캡슐화하기 위해 전보(11)에서 최적화 한 model system을 기초로 피복물질을 선정하고 이에 3%의 gellan gum을 첨가한 후 유화압력을 20.7 MPa로 하여 유화액을 제조하였다. 이를 top spray dryer와 fluidized bed granulator에 의한 공정으로 캡슐을 제조하여 캡슐화 수율, surface oil, 수분함량, 입자크기, 캡슐의 저장 안정성 및 제품 응용성을 비교하였다. Fluidized bed granulator에 의한 캡슐은 top spray dryer에 의한 캡슐보다 상대적으로 surface oil 함량이 낮고 수율이 높으며 입자 크기가 컸다. 제조한 캡슐을 37oC에서 저장하면서 flavor retention을 측정한 결과 참기름 원료 자체를 저장한 경우 향기 성분은 1% 이하의 잔존 함량을 나타내어 대부분의 향기 성분이 소실되었다고 보았으나, top spray dryer와 fluidized bed granulator에 의한 캡슐은 각각 37%, 42%의 향기성분을 보유하여 향기 성분 포집성 및 보존성이 우수하였다. 또한 쇠고기 죽 제품에 응용한 후 관능검사결과에서도 참기름 캡슐을 사용한 제품들이 모두 참기름 원료 자체를 사용한 제품보다 풍미의 강도 및 기호도면에서 모두 높았고 특히 fluidized bed granulator를 이용하여 제조한 캡슐을 사용한 제품이 가장 우수하게 평가되었다. 따라서 참기름 원료와 같이 향기 성분이 소실 되기 쉬운 소재를 fluidized bed granulator를 이용하여 저온 미세 캡슐화하면 풍미의 안정성 증대에 효과가 있을 것으로 판단된다. Top spray-drying method is frequently utilized for flavor encapsulation, but the top spray-dried products frequently suffer from high losses of volatile flavor as the result of a high processing temperature (150-300℃). In an effort to solve these problems, a low-temperature fluidized-bed granulating method was utilized to encapsulate the flavor. For the encapsulation of sesame oil, oil-in-water emulsions of sesame oil and a mixture of maltodextrin, modified starch, gum arabic, and gellan gum were bottom-sprayed at milder temperatures (70-100℃) using a fluidized-bed granulator. Sesame oil extracts from microcapsules were obtained via a simultaneous distillation/extraction technique, and the retention of volatile flavor compounds was analyzed via a gas chromatography-mass spectrometry. The retention of volatile flavors of sesame oil per se, spray-dried and fluidized-bed granulated microcapsules after 3-day-storage at 37℃ were 0.8%, 37.2%, and 42.0%, respectively. In addition, the low-temperature fluidized-bed granulation showed higher encapsulation yield and sensory preferences for the application of commercial products (beef rice porridge), as compared to spray drying.

이탈리안 라이그라스(IRG) 건조기 개발 및 건조 성능 비교

김밝금,이아영,김기영,임종국 한국산학기술학회 2022 한국산학기술학회논문지 Vol.23 No.7

In the 2000s, meat consumption per person in South Korea has increased by about 3% every year. Recently, meat consumption at home in South Korea has been increasing further as external activities of people have been restricted due to the spread of COVID-19. Accordingly, the production of high-quality roughage is becoming important as a measure of the competitiveness of stockbreeding. Italian ryegrass(IRG) is a representative winter roughage with good livestock preference and excellent initial growth, so the demand for IRG is increasing rapidly. However, the IRG harvest period overlaps with the rainy season in South Korea, and it is difficult to dry IRG due to its high moisture content and thermal properties. Hence, we developed suitable dryers for IRG and compared their respective characteristics. In particular, 30kg of IRG seeds with an initial moisture content of 50% were dried by conveyor and fluidized-bed dryers, respectively, at 60°C. Subsequently, the optimal moisture content for seed storage and distribution was found to be less than 14%. In addition, this study showed that the drying time of the conveyor dryer was 20min. On the other hand, in the fluidized-bed dryer, the target moisture content could not be reached even after drying the seeds for 2h, and the vertical deviation of moisture content, in this case, was large. Therefore, it was judged that the conveyor dryer was more suitable for drying IRG seeds than the fluidized-bed dryer. 2000년대 들어 우리나라 1인당 육류 소비량은 해마다 약 3 %씩 증가하고 있다. 최근, 코로나 19 확산으로 외부 활동에 제약을 받으면서 가정 내 육류 소비가 더욱 증가하고 있다. 이에 따라 양질의 조사료 생산 또한 축산 경쟁력이 될 만큼 중요시되고 있다. 이탈리안 라이그라스(IRG)는 대표적인 동계 조사료로 가축 기호성이 매우 좋고, 초기 생육이 우수하여 수요량이 급증하고 있다. 하지만 IRG 수확 시기와 우리나라 계절상 장마 기간이 겹치고, 높은 함수율 및 품온을 가진 물성 특성으로 건조 단계에 어려움을 겪고 있다. 현재, 국내에는 IRG 종자용 건조 시스템이 전무하여 종자 건조 속도 및 종자 품질 저하 문제가 발생한다. 이를 극복하기 위해 본 논문에서는 IRG 종자용 건조 장치를 개발하여 건조 특성을 비교하고자 하였다. 초기 함수율 50 % 이상의 수확 직후 종자를 사용하였으며, 30 kg씩 60 ℃의 동일한 온도로 설정된 각 건조기를 이용해 시험을 수행하였다. 종자 저장 유통을 위한 목표 함수율은 14 % 미만이며, 컨베이어 건조기 이용 건조 결과 20분 이내에 건조 목표 함수율까지 도달하였으며, 시간당 처리량은 90 kg/hr이었다. 반면에 유동층 건조기를 이용해 2시간 건조 시에도 목표 함수율까지 도달하지 못하였으며 상하 함수율 편차가 컸다. 따라서 완전 밀폐식인 유동층 건조기보다 컨베이어 건조기가 IRG 종자용에 더 적합할 것으로 판단되었다.

Production of Ready-to-Reconstitute Functional Beverages by Utilizing Whey Protein Hydrolysates and Probiotics

Sabbini Kalyan Kumar,Heddur Manjappa Jayaprakasha,백현동,김수기,정아람,한송이,Yoh Chang Yoon 한국축산식품학회 2010 한국축산식품학회지 Vol.30 No.4

This investigation was aimed at developing a ready-to-reconstitute beverage by utilizing probiotics and whey protein hydrolysates carrying bioactive peptides. Cheddar cheese whey was ultrafiltered. The 18% protein retentate was subjected to protein hydrolysis using Neutrase. The hydrolyzed retentate was further condensed to 35% total solids and spray-dried at 75℃ outlet air temperature. Different levels of sugar, citric acid and stabilizer were blended for spray-dried hydrolysates. Spray-dried hydrolysate was further inoculated with different levels of probiotics grown in a whey medium and dried in fluidized-bed drier at 40℃ to obtain a ready-to-reconstitute beverage. Hydrolysis was greatest at an enzyme:substrate ratio of 1:25 for 3 h. Spray-dried hydrolysate reconstituted to 1% protein and blended with 15% sugar, 0.2% citric acid and 0.15%xantham gum resulted in a superior product with no sedimentation. Accordingly, sugar, citric acid and xanthum gum were dry-blended with spray-dried hydrolysates. Bifidobacterium bifidum and Lactobacillus acidophilus that was grown separately in a whey medium, blended to produce 2% spray-dried hydrolysate and dried as described above resulted in a readyto-reconstitute beverage mix. The fluidized dried product typically exhibited a probiotic count of 108colony forming units (CFU)/g. However, blending of probiotic to the retentate and direct spray-drying precipitously reduced the probiotic count to 104 CFU/g of powder.

Production of Ready-to-Reconstitute Functional Beverages by Utilizing Whey Protein Hydrolysates and Probiotics

Kumar, Sabbini Kalyan,Jayaprakasha, Heddur Manjappa,Paik, Hyun-Dong,Kim, Soo-Ki,Han, Song-Ee,Jeong, A-Ram,Yoon, Yoh-Chang Korean Society for Food Science of Animal Resource 2010 한국축산식품학회지 Vol.30 No.4

This investigation was aimed at developing a ready-to-reconstitute beverage by utilizing probiotics and whey protein hydrolysates carrying bioactive peptides. Cheddar cheese whey was ultrafiltered. The 18% protein retentate was subjected to protein hydrolysis using Neutrase. The hydrolyzed retentate was further condensed to 35% total solids and spray-dried at $75^{\circ}C$ outlet air temperature. Different levels of sugar, citric acid and stabilizer were blended for spray-dried hydrolysates. Spray-dried hydrolysate was further inoculated with different levels of probiotics grown in a whey medium and dried in fluidized-bed drier at $40^{\circ}C$ to obtain a ready-to-reconstitute beverage. Hydrolysis was greatest at an enzyme:substrate ratio of 1:25 for 3 h. Spray-dried hydrolysate reconstituted to 1% protein and blended with 15% sugar, 0.2% citric acid and 0.15% xantham gum resulted in a superior product with no sedimentation. Accordingly, sugar, citric acid and xanthum gum were dry-blended with spray-dried hydrolysates. Bifidobacterium bifidum and Lactobacillus acidophilus that was grown separately in a whey medium, blended to produce 2% spray-dried hydrolysate and dried as described above resulted in a readyto-reconstitute beverage mix. The fluidized dried product typically exhibited a probiotic count of $10^8$colony forming units (CFU)/g. However, blending of probiotic to the retentate and direct spray-drying precipitously reduced the probiotic count to $10^4$ CFU/g of powder.

Study on the Fluidized-Bed Drying Characteristics of Sawdust as a Raw-Material for Wood-Pellet Fuel

Hyoung Woo Lee 한국목재공학회 2006 목재공학 Vol.34 No.2

Screening of Spray-Dried K₂CO₃-Based Solid Sorbents using Various Support Materials for CO₂ Capture

Eom, Tae Hyoung,Lee, Joong Beom,Baek, Jeom In,Ryub, Chong Kul,Rhee, Young Woo Korea Electric Power Corporation 2015 KEPCO Journal on electric power and energy Vol.1 No.1

$K_2CO_3$-based dry regenerable sorbents were prepared by spray-drying techniques to improve mass produced $K_2CO_3-Al_2O_3$ sorbents (KEP-CO2P, hereafter), and then tested for their $CO_2$ sorption capacity by a $2,000Nm^3/h$ (0.5 MWe) $CO_2$ capture pilot plant built for Unit 3 of the Hadong thermal power station in 2010. Each of the sample sorbents contained 35 wt.% $K_2CO_3$ as the active materials with various support materials such as $TiO_2$, MgO, Zeolite 13X, $Al_2O_3$, $SiO_2$ and hydrotalcite (HTC). Their physical properties and reactivity were tested to evaluate their applicability to a fluidized-bed or fast transport-bed $CO_2$ capture process. The $CO_2$ sorption capacity and percentage utilization of $K_2CO_3$-MgO based sorbent, Sorb-KM2, was $8.6g-CO_2/100g$-sorbents and 90%, respectively, along with good mechanical strength for fluidized-bed application. Sorbs-KM2 and KT were almost completely regenerated at $140^{\circ}C$. No degradation of Sorb-KM by $SO_2$ added as a pollutant in flue gas was observed during a cycle test.

Performance analysis of K-based KEP-CO2P1 solid sorbents in a bench-scale continuous dry-sorbent CO2 capture process

ChangkeunYi,Young Cheol Park,Sung-Ho Jo,Seung Yong Lee,Jong-Ho Moon,Chong Kul Ryu,Joong Beom Lee 한국화학공학회 2016 Korean Journal of Chemical Engineering Vol.33 No.1

Korea Institute of Energy Research (KIER) and Korea Electric Power Corporation Research Institute (KEPCORI) have been developing a CO2 capture technology using dry sorbents. In this study, KEP-CO2P1, a potassium-based dry sorbent manufactured by a spray-drying method, was used. We employed a bench-scale dry-sorbent CO2 capture fluidized-bed process capable of capturing 0.5 ton CO2/day at most. We investigated the sorbent performance in continuous operation mode with solid circulation between a fast fluidized-bed-type carbonator and a bubbling fluidizedbed- type regenerator. We used a slip stream of a real flue gas from 2MWe coal-fired circulating fluidized-bed (CFB) power facilities installed at KIER. Throughout more than 50 hours of continuous operation, the temperature of the carbonator was maintained around 70-80 oC using a jacket-type heat exchanger, while that of the regenerator was kept above 180 oC using an electric furnace. The differential pressure of both the carbonator and regenerator was maintained at a stable level. The maximum CO2 removal was greater than 90%, and the average CO2 removal was about 83% during 50 hours of continuous operation.

The application of spray-dried ferrierite particle for fluidized-bed dimethyl ether carbonylation

정현승,성우창,이동현,배종욱 한국공업화학회 2023 한국공업화학회 연구논문 초록집 Vol.2023 No.0

The study on drying characteristics of IBC coal on fluidization according to experiment using lab-scale fluidized-bed reactor

( Do Man Jeon ),( Dong Ha Jang ),( Young Shin Jeon ),( Hyungtaek Kim ),( Si Hyun Lee ),( Sang Do Kim ) 한국폐기물자원순환학회 2011 ISWA Vol.2011 No.0

Thermal design of heat-exchangeable reactors using a dry-sorbent CO₂ capture multi-step process

Moon, Hokyu,Yoo, Hoanju,Seo, Hwimin,Park, Yong-Ki,Cho, Hyung Hee Elsevier 2015 ENERGY Vol.84 No.-

<P><B>Abstract</B></P> <P>The present study proposes a multi-stage CO<SUB>2</SUB> capture process that incorporates heat-exchangeable fluidized-bed reactors. For continuous multi-stage heat exchange, three dry regenerable sorbents: K<SUB>2</SUB>CO<SUB>3</SUB>, MgO, and CaO, were used to create a three-stage temperature-dependent reaction chain for CO<SUB>2</SUB> capture, corresponding to low (50–150 °C), middle (350–650 °C), and high (750–900 °C) temperature stages, respectively. Heat from carbonation in the high and middle temperature stages was used for regeneration for the middle and low temperature stages. The feasibility of this process is depending on the heat-transfer performance of the heat-exchangeable fluidized bed reactors as the focus of this study. The three-stage CO<SUB>2</SUB> capture process for a 60 Nm<SUP>3</SUP>/h CO<SUB>2</SUB> flow rate required a reactor area of 0.129 and 0.130 m<SUP>2</SUP> for heat exchange between the mid-temperature carbonation and low-temperature regeneration stages and between the high-temperature carbonation and mid-temperature regeneration stages, respectively. The reactor diameter was selected to provide dense fluidization conditions for each bed with respect to the desired flow rate. The flow characteristics and energy balance of the reactors were confirmed using computational fluid dynamics and thermodynamic analysis, respectively.</P> <P><B>Highlights</B></P> <P> <UL> <LI> CO<SUB>2</SUB> capture process is proposed using a multi-stage process. </LI> <LI> Reactor design is conducted considering heat exchangeable scheme. </LI> <LI> Reactor surface is designed by heat transfer characteristics of fluidized bed. </LI> </UL> </P>