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- 자료유형
- 학술저널
- 저자정보
- 발행연도
- 2005.8
- 수록면
- 180 - 188 (9page)
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The separation performances for thirty different dimensions of a low-pressure hydrocyclone (LPH) were tested in order to obtain an optimum dimension scale for fecal solid removal from an aquaculture system. The geometric variables were considered on two inlet diameters (Di: 30 and 50 ㎜), five overflow diameters (Do: 30, 50, 60, 70 and 100 ㎜), and three cylinder lengths (Lc: 250, 345 and 442 ㎜), while the cylinder diameter (Dc) of 335 ㎜, underflow diameter (Du) of 50 ㎜ and cone angle (θ) of 68° were kept constant. A small size for carp feces was regarded as the target for the removal of solids. Spherical polystyrene particles (1.1-1.3 ㎜ dia., ρ_s=1.05 g/㎤), which demonstrate a similar settling velocity and specific gravity to the carp feces, were used as feed. The separation performance was tested in the range of 330 to 1200 ml/s of the inflow rate. Experimental results using ANCOVA and the Tukey test (α=0.05) demonstrated that the separation performances of LPH were significantly affected (P<0.05) by fi, Di and Do. In contrast, there was no significant Lc effect (P>0.05) on the separation performances. The maximum separation performance was detected at dimension combinations of 30 ㎜ of inflow diameter (Di), 50, 60 and 70 ㎜ of overflow diameter (Do), 345 ㎜ of cylinder length (Lc). The dimension proportions were 0.09, 1.03, 0.15-0.21 and 0.15 for Di/Dc, Lc/Dc, Do/Dc and Du/Dc, respectively.
목차
Abstract
Introduction
Materials and Methods
Results
Discussion
Acknowledgements
References
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