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Structure optimization of CycloBio fluidized sand biofilters based on numerical simulation

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文献类型：外文期刊

作者： Liu, Yao ¹ ; Huang, Zhi-Tao ¹ ; Song, Xie-Fa ¹ ; Lei, Ji-Lin ² ; Peng, Lei ¹ ; Liu, Bao-Liang ² ;

作者机构： 1.Ocean Univ China, Coll Fisheries, Qingdao 266003, Peoples R China

2.Chinese Acad Fishery Sci, Yellow Sea Fisheries Res Inst, Qingdao 266071, Peoples R China

关键词： Recirculating aquaculture system;Cyclobio fluidized sand biofllters;Numerical simulation;Optimization design;Orthogonal test

期刊名称：AQUACULTURAL ENGINEERING （影响因子：3.281；五年影响因子：3.727 ）

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年卷期：

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收录情况： SCI

摘要： 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 CB FSB 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 to 881 g m(-3) day(-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. (C) 2015 Elsevier B.V. All rights reserved.

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