A Study on the pH Characterization for Microbial Fermentation in Tomato Juice

S.M. Choi,D. Supeno,Okka A.,S.W. Chung,H.S.Kim,J.S. Kim,J.M. Park,S.H. Kwon,S.K. Kwon,W.S. Choi 한국산업융합학회 2014 한국산업융합학회 논문집 Vol.17 No.3

This study was conducted to know the behavior of pH behavior in the tomato juices to find out an effective medium for microbial cultivation. Bacterial culture media is a material consist a mixture of nutrients used to grow microorganisms on or in it. In addition, microbial culture media can also be used for isolation, propagation, testing the nature physiological, and calculation of the number of microorganisms. Fresh tomato juice is used for basic ingredient, therein added salt, sugar and EM (Effective Microbial). The fermented solution placed in a room with a temperature of 40℃. Data retrieval before the pH value reached a constant value is done every 12 hours, after constant rate data collection was done every 24 hours. The pH value has been steady after 372 hours of fermentation process (15.5 days). From the results obtained that the amount of additional ingredient which added into tomato juice does not affect final pH value of solution. Thereby the most effective treatment for microbial cultivation media is treatment number four.

Modal and Stress Analysis of Spur Gear in DC Motor Gearhead using Finite Element Model

( Pandu Sandi Pratama ),( Destiani Supeno ),( Seongwon Jeong ),( Cunsook Park ),( Jihee Woo ),( Eunsook Lee ),( Woojin Yoon ),( Wonsik Choi ) 한국농업기계학회 2017 한국농업기계학회 학술발표논문집 Vol.22 No.1

In electric agricultural machine the gearhead is needed to convert the high speed low torque rotation motion generated by DC motor to lower speed high torque motion used by the vehicle. The gearhead consist of several spur gears works as reduction gears. Spur gear have straight tooth and are parallel to the axis of the wheel. Spur gears are the most easily visualized gears that transmit motion between two parallel shafts and easy to produce. The modeling and simulation of spur gears in DC motor gearhead is important to predict the actual motion behavior. A pair of spur gear tooth in action is generally subjected to two types of cyclic stress: contact stress and bending stress including bending fatigue. The stress may not attain their maximum values at the same point of contact fatigue. These types of failure can be minimized by analysis of the problem during the design stage and creating proper tooth surface profile with proper manufacturing methods. To improve its life expectation in this study modal and stress analysis of gearhead is simulated using ansys work bench software based on finite element method (FEM). The modal analysis was done to understand gearhead deformation behaviour when vibration occurs. FEM static stress analysis is also simulated on gearhead to simulate the gear teeth bending stress and contact stress behavior. This methodology serves as an approach for gearhead design evaluation, and the study of gear stress behavior in DC motor gearhead which is needed in the small workshop scale industries.

Design Optimization of DC Motor Gearbox for Electric Agricultural Vehicle Based on Genetic Algorithm

( Pandu Sandi Pratama ),( Destiani Supeno ),( Cunsook Park ),( Jihee Woo ),( Eunsuk Lee ),( Wonsik Choi ) 한국농업기계학회 2017 한국농업기계학회 학술발표논문집 Vol.22 No.2

In electric agricultural machine the gearbox is used to increase torque and lower the output speed of the motor shaft. The gearbox consist of several shafts, helical gears and spur gears works in series. Optimization plays an important role in gear design as reducing the weight or volume of a gear set will increase its service life and improve the bearing capacity. In this paper the basic design parameters for gear like shaft diameter and face width are considered as the input variables. The bending stress and material volume is considered as the objective function. ANSYS was used to investigates the bending stress when the variable was changed. Artificial Neural Network (ANN) is used to obtained the mathematical model of the system based on the bending stress behaviour. The ANN was used since the output system is nonlinear. The Genetic Algorithm (GA) technique of optimization is used to obtain the optimized values of shaft diameter and face width on the pinion based on the ANN mathematical model and the results are compared as that obtained using the traditional method. The ANN and GA was perform using MATLAB. The simulation results was shown that the proposed algorithm was successfully calculate the value of shaft diameter and face width to obtain the minimal bending stress and material volume of the gearbox.

A Study on the pH Characterization for Microbial Fermentation in Tomato Juice

Choi, S.M.,Supeno, D.,A., Okka,Chung, S.W.,Kim, H.S.,Kim, J.S.,Park, J.M.,Kwon, S.H.,Kwon, S.K.,Choi, Won Sik The Korean Society of Industry Convergence 2014 한국산업융합학회 논문집 Vol.17 No.3

This study was conducted to know the behavior of pH behavior in the tomato juices to find out an effective medium for microbial cultivation. Bacterial culture media is a material consist a mixture of nutrients used to grow microorganisms on or in it. In addition, microbial culture media can also be used for isolation, propagation, testing the nature physiological, and calculation of the number of microorganisms. Fresh tomato juice is used for basic ingredient, therein added salt, sugar and EM (Effective Microbial). The fermented solution placed in a room with a temperature of 40oC. Data retrieval before the pH value reached a constant value is done every 12 hours, after constant rate data collection was done every 24 hours. The pH value has been steady after 372 hours of fermentation process (15.5 days). From the results obtained that the amount of additional ingredient which added into tomato juice does not affect final pH value of solution. Thereby the most effective treatment for microbial cultivation media is treatment number four.

An Immune-Inspired Algorithm for Vehicle Routing Problem

Ayi Purbasari,Handoko Supeno,Achmad Nizar Hidayanto 한국정보통신학회 2019 2016 INTERNATIONAL CONFERENCE Vol.11 No.1

Combinatorial optimization is a problem of finding discrete feasible solutions and its best solution for all feasible solutions. The Travelling Salesman Problem (TSP) and Vehicle Routing Problem (VRP) are the common problems of combinatorial optimization. In VRP, we need to find the optimal set of routes for a vehicle to traverse in order to deliver to a given set of customers. VRP generalises TSP (multi-TSP) and the objective of the VRP is to minimize the total route cost. Many approaches and algorithms proposed by researchers nowdays. In this paper, we propose an Artificial Immune System"s algorithm as a promising new VRP algorithm. We use the Clonal Selection Algorithm (CSA) which is an immuneinspired algorithm based on Clonal Selection Principle. This approach is implemented and tested on various dataset of waste transportation In Northern Bandung, West Java, Indonesia. The preliminary results are promising and lead to believe that the Clonal Selection Algorithm is a viable approximation heuristic for the VRP.

Thermal Analysis of Cooling System In Crusher Machine for Dry Soybean Powder Production

( Pandu Sandi Pratama ),( Supeno Destiani ),( Jaeyoung Byun ),( Wonsik Choi ) 한국농업기계학회 2018 한국농업기계학회 학술발표논문집 Vol.23 No.1

Soybean powder is finely grounded derived soybeans product. It is a rich source of proteins, as well as iron, B vitamins and calcium. Soybean powder was used as main ingredient of whole beans tofu, soy milk, and it is added to a variety of products such as cereals, pudding, yogurt, cottage cheese, shakes and casseroles to add a pleasant texture and flavor. To make a high quality soybean powder, soybeans was crushed into small size using crusher machine. During crusher operation, heat was generated through friction and contact between soybeans and cutting tooth. To prevent oil extracted from soybeans, the crusher temperature should be kept under 60°C. Therefore, cooling system is needed. The purpose of this research is to analyze the temperature variation occurred during crusher machine operation and to understand the effect of cooling system to the crusher machine. Moreover, the analysis was used to predict the temperature behavior and clarify the effectiveness of the proposed cooling system. The thermal analysis simulation was done using ANSYS Fluent 15. Firstly, 3D model of crusher housing was created. The model then simplified and the geometry model was obtained. In addition, the mesh of the model was generated. The materials properties were defined and the boundary condition was determined. Finally, problem was solved, visualized and the results was shown. The normal cumulative contact energy was obtained from cutting simulation based on discrete element method. This energy was dissipated as heat that increases the temperature of crusher machine. In this simulation, the initial temperature of inner side of housing is 70°C. The environment temperature is 28°C. The water cooler temperature was varied from 5°C to 20°C. The final temperature after 10 second was observed. The simulation result shows that the temperature on the middle of housing after 10 second using 5°C cooler is less than 30°C, using 10°C cooler is less than 40°C, using 15°C cooler is less than 50°C, and using 20 °C cooler is less than 60°C as a result. It was found that optimal temperature of water cooler is between 5 °C and 10°C. This work helps the soybeans crusher machine developer make a better product at the early design stage with lower cost and faster development time.

Chemical Characteristics of Aloe Vera and Aloe Saponaria in Ulsan Korea

Sun-Mi Choi,Destiani Supeno,Jae-Young Byun,Soon-Hong Kwon,Sung-Won Chung,Soon-Goo Kwon,Jong-Min Park,Jong-Soon Kim,Do-Young Kwon,Won-Sik Choi 보안공학연구지원센터 2016 International Journal of Bio-Science and Bio-Techn Vol.8 No.3

The Aloe saponaria plant has been known and used for centuries for its health, beauty, medicinal and skin care properties. On the other hand, Aloe saponaria also contain anti nutrition compounds namely saponin which leads negative effect. Other kind of Aloe known is Aloe vera. The aim of the study was to investigate the saponin content from each part of Aloe plant to maximize it benefits and advantages. In order to know the higher saponin content, this study was comparing between Aloe saponaria and Aloe vera. The saponin content were analyzed from five part of Aloe leaf such as tip of the leaf, middle of the leaf, bottom of the leaf, leaf skin and leaf flesh. To do this, following are done. Total saponin content was identified by extraction. The procedure was performed by modifying the four thermal processing methods by Xu and Chang, 2009. The saponin analysis shows that the skin (S) of the Aloe leaf contains highest concentration of saponin compare to the other part, on both of Aloe species leaf. Those are 1.519±0.048 mg/g for Aloe saponaria and 1.212±0.035 mg/g for Aloe vera respectively. The highest water content obtained in mesophyll tissue (IS). Up to 98% the mesophyll tissue contains with water.

P4-17 ; The Influence of the Magnetization Hexagon Water on the Growth of Radish Plant

( Hae Sil Kim ),( Destiani Supeno ),( Okka Adiyanto ),( Sun Mi Choi ),( Jae Young Byun ),( Jong Soon Kim ),( Sung Won Chung ),( Jong Min Park ),( Soon Goo Kwon ),( Soon Hong Kwon ),( Won Sik Cho ) 한국농업기계학회 2014 한국농업기계학회 학술발표논문집 Vol.19 No.2

Effect and Nutrient Content of Fermented Aloe Saponaria as Pigs Feed Additive Food

Choi Sun Mi,Destiani Supeno,Kwon Soon Hong,Chung Sung Won,Kwon Soon Goo,Park Jong Min,Kim Jong Soon,Choi Won Sik 한국산업융합학회 2018 한국산업융합학회 논문집 Vol.21 No.1

Aloe gel layer is well known as raw materials of medicines and cosmetics due to their antioxidant and anti-inflammatory properties. In aloe gel extracting process, the outer part of the leaf was removed. It contains high quality of fiber and many nutrients. However, this part is thrown away and generally used as fertilizer. The purpose of this research was to examine the important nutrient of Aloe saponaria. Moreover, the feasibility of using aloe as a dietary supplement by feeding fermentation treatment of aloe was investigated. To do this, the aloe leaf was divided into several parts including leaf skin, bottom of the leaf, tip of the leaf, middle of the leaf, and leaf flesh. Then the saponin content were analyzed from each part. The extraction method was used to clarify the saponin content. The aloe then fermented to improve it benefit. The fermented Aloe then given as dietary food to group of pig. Finally, the appropriate feed level was determined and the pork meat quality was analyzed. The extraction of saponin shows that the highest concentration of saponin located on the skin of the leaf. The feeding experiment shows that there is no significant difference in pig growth without aloe dietary food and groups with aloe as dietary food. It was conclude that fermented aloe can replace the pigs normal feeder as an alternative feeding solution.

Development of Super-capacitor Battery Charger System based on Photovoltaic Module for Agricultural Electric Carriers

Kang, Eonuck,Pratama, Pandu Sandi,Byun, Jaeyoung,Supeno, Destiani,Chung, Sungwon,Choi, Wonsik Korean Society for Agricultural Machinery 2018 바이오시스템공학 Vol.43 No.2

Purpose: In this study, a maintenance free super-capacitor battery charging system based on the photovoltaic module, to be used in agricultural electric carriers, was developed and its charging characteristics were studied in detail. Methods: At first, the electric carrier system configuration is introduced and the electric control components are presented. The super-capacitor batteries and photovoltaic module used in the experiment are specified. Next, the developed charging system consisting of a constant current / constant voltage Buck converter as the charging device and a super-capacitor cell as a balancing device are initiated. The proposed circuit design, a developed PCB layout of each device and a proportional control to check the current and voltage during the charging process are outlined. An experiment was carried out using a developed prototype to clarify the effectiveness of the proposed system. A power analyzer was used to measure the current and voltage during charging to evaluate the efficiency of the energy storage device. Finally, the conclusions of this research are presented. Results: The experimental results show that the proposed system successfully controls the charging current and balances the battery voltage. The maximum voltage of the super-capacitor battery obtained by using the proposed battery charger is 16.2 V, and the maximum charging current is 20 A. It was found that the charging time was less than an hour through the duty ratio of 95% or more. Conclusions: The developed battery charging system was successfully implemented on the agricultural electric carriers.