In this study, durability and reliability were verified by developing a compost crushing equipment for mushroom cultivation that can perform both the compost turning process and the rice straw grinding process. Structural analysis and vibration analysis were performed. The designed compost crusher is designed with sufficient strength within the range that satisfies the safety factor as a result of structural analysis. In the case of the basic frame, it is judged to have sufficient safety against various impacts that may occur during transport or operation. As a result of the performance evaluation of the compost grinding device, it was measured to be capable of crushing and turning 11,630kg of compost in one hour, and it showed excellent performance in terms of work volume and loadable height.

In the agriculture of strawberry cultivation, it is necessary to loosening and breaking up of the intertwined coco peat and strawberry root in order to cultivate strawberry again. The main objective of this study is to design and analyze the structure of strawberry rotary device for using breaking up of coco peat and strawberry root. In order to perform crushing coco peat on the bed, the rotary device was designed under the weigh 20kg with the speed 11.75m/min, and it can operate on bed width from 250~310mm. Due to different depth of bed, the body of device also was designed screw holder to adjust the hight from 0~120mm. To evaluate the safety of structure, body device was analyzed in static and free vibration state by using Abaqus program. The device was applied maximum load 1177.2N, and the maximum equivalent stress was reached 41.9MPa. The free vibration analysis of two rotating cutter showed minimum natural frequency mode 338.58Hz and 339.9Hz. The results indicate that the designed rotary device was satisfied and has enough strength under design and simulation conditions.

This study was successfully achieved out the optimized system for dispersing and mixing condition of resin liquid. The flow analysis was simulated according to the shape of the impeller and the stirring tank using ANSYS software and optimized in advanced design. As a result, it was confirmed that the shape and double number of the impeller on the flow field are influenced better effects in a range of mixing and diffusion areas comparing to single number of impeller. It was considered that stirring was performed more quickly and efficiently under the condition of double numbers and saw tooth type impeller. This result can be applied practically for the mixing tank in the industrial application and avaliable used to make a new system for painting equipment.

Waste oyster shell is a waste product from oyster-culturing farm and also presents a major disposal problem in itself. The present study is conducted to develop equipments for recycling waste oyster shells etc. Through the processing of the recycling treatment of wasted marine products, it is transfered and used as the other functional materials. The advanced drying and crushing equipments are designed and conducted the performance evaluation. Finally, it was shown that performance of these are superior to that of the other existing equipments.

고무화합물 형태로 구성된 조영제의 병에 Syringe Connector의 Spike를 연결 시 고무의 찢김 정도를 알아보고 찢김 및 분쇄로 인한 합성고무의 혼입 유무와 분쇄된 합성고무가 검출 시 분쇄물의 크기를 실험을 통해 알아보고자 하였다. 그 결과 찢김 정도의 경우 Syringe Connector의 끝과 최초 접촉하는 앞면이 약 3.14±0.04 ㎜로 뒷면 보다 많이 찢겼으며, 실험 대상인 10 병의 조영제에서 평균 7 개에서 15 개로 모두 분쇄물이 검출되었다. 검출된 분쇄물을 이용하여 크기를 측정한 결과 평균크기는 약 7.89±0.31 ㎛이었다. 향 후 다양한 실험 및 분석방법을 통한 추가실험과 더불어 흡인된 분쇄물 차단을 위한 미세 필터타입 자동주입장치의 개발이 필요하며, 분쇄물 유입 시 치명적 사고를 대비하여 관련기관의 관심 또한 필요할 것으로 사료된다.