• 한국식품과학회지
• /
• 제25권3호
• /
• pp.210-213
• /
• 1993

본 실험의 목적은 공극률과 상향유속의 관계에서 세입자의 유동특성을 고찰하는 데 있다 Column 내경은 유동층의 유속과 공극률과의 관계에 큰 영향을 미치지 못했으며 유속과 공극률과의 관계는 다음과 같다. $\frac{u}{u_t}={\varepsilon}^{3.703}$----모래$\frac{u}{u_t}={\varepsilon}^{3.5665}$----이온 교환수지$\frac{u}{u_t}={\varepsilon}^{4.066}$---GAC 또 유동층 매질입자는 구형을 사용하는 것이 일정유속에서 공극률을 낮게 유지할 수 있어 좋았고 실제로 미생물막 유동층 반응기에서는 미생물막이 매질에 부착되면 비중이 감소하므로 매질의 비중이 높을수록 유동층을 유지하기가 쉽다.

• 한국농업기계학회:학술대회논문집
• /
• 한국농업기계학회 1996년도 International Conference on Agricultural Machinery Engineering Proceedings
• /
• pp.737-745
• /
• 1996

In recent years, with the increase in the consumption of natural resources and energy, global environmental problems have appeared. This is a very serious environmental load on worldwide food production. For this reason, innovative techniques for production of low entropy by using effectively the energy for the ecosystemic agriculture have been expected. In this study, granular ceramics of 2 to 3mm in diameter having electrical charges at the surface were produced, using the natural raw materials of silicate minerals haing excellent moldabilities and sintering properties . Production of water having functions was attempted by effective use of the electrochemical energy of the ceramics with an efficient water treatment apparatus in which the ceramics were fluidized in water, differently from conventional systems. In the experimental results, the EC of water treated with the ceramics was not changed, but the ORP and also the pH and the DO were changed. The speed of oxidation -re uction reaction was high, and the ceramics -treated water enhanced the vigor of seeds. It can be expected that this treatment system, by which the ORP of water can be moderately controlled, is advantageous in controlling the growth of plants.