Structure optimization of CycloBio

Structure optimization of CycloBio fluidized sand biofilters based on numerical simulation
Yao Liua,b, Zhi-Tao Huanga, Xie-Fa Songa,∗, Ji-Lin Leib, Lei Penga, Bao-Liang LiubaCollege of Fisheries, Ocean University of China, Qingdao 266003, ChinabYellow Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Qingdao 266071, Chinaa
To improve the removal efficiency for dissolved wastes within CycloBio (CB) fluidized sand biofilters(FSBs) in recirculating aquaculture systems, we investigated their structural design and optimization using computational fluid dynamics (CFD) modeling tools, an orthogonal test method, and experimental verification. Results showed that the effects of structural parameters on bed expansion from large to small were: cone height, cone diameter and slot width. The best combination was: cone height 60 mm, cone diameter 165 mm, and slot width 1.0 mm. The solid phase was well distributed not only in the radial direction, but also in the axial direction in the optimized CB FSB. The bed expansion (40%–120%) was increased about 13%. Energy savings were 21%–28% at the same bed expansion. When the optimized CBFSB was used to treat synthetic aquaculture wastewater, with three bed expansions and four levels of C/N, total ammonia nitrogen removal rate expressed per unit of expanded bed volume was high, from 629 to881 g m−3day−1. All results indicated that the structure of the optimized CB FSB was more reasonable and that the combination of CFD simulation and the orthogonal test method could be successfully applied to structural optimization.

ผลลัพธ์ (อังกฤษ) 2:

Structure Optimization of CycloBio fluidized Sand Biofilters based on Numerical Simulation
Yao Liua, B, Zhi-Tao Huanga, Xie-Fa Songa, *, Ji-Lin Leib, Lei Penga, Bao-Liang LiubaCollege of Fisheries, Ocean University of China, Qingdao two hundred sixty-six thousand and three. , ChinabYellow Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Qingdao 266071, ChinaÃ
To improve the Removal efficiency for Dissolved wastes Within CycloBio (CB) fluidized Sand Biofilters (FSBs) in recirculating Aquaculture Systems, we investigated their structural Design and Optimization using Computational. fluid dynamics (CFD) modeling tools, an orthogonal test method, and experimental verification. Results showed that the effects of structural parameters on bed expansion from large to small were: cone height, cone diameter and slot width. The best combination was: cone height 60 mm, cone diameter 165 mm, and slot width 1.0 mm. The solid phase was well distributed not only in the radial direction, but also in the axial direction in the optimized CB FSB. The bed expansion (40% -120%) was increased about 13%. Energy savings were 21% -28% at the same bed expansion. When the optimized CBFSB was used to treat synthetic aquaculture wastewater, with three bed expansions and four levels of C / N, total ammonia nitrogen removal rate expressed per unit of expanded bed volume was high, from 629 to881 gm-3day-1. All results indicated that the structure of the optimized CB FSB was more reasonable and that the combination of CFD simulation and the orthogonal test method could be successfully applied to structural optimization.