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In recent years, the technology of Siniperca chuatsi culture with artificial formulated feed has made some breakthroughs, which has become the focus of attention in the characteristic freshwater fish industry. Chizhou, Anqing, Wuhu, Hefei and other places in Anhui Province are exploring or trying to introduce this new technology in order to break through the drawbacks of traditional Siniperca chuatsi culture with live bait fish. Taking Chizhou as an example, this paper analyzed the economic benefits of Siniperca chuatsi culture with artificial formulated feed, pointed out the problems, and put forward the development suggestions, in order to provide reference for the high-quality development of Siniperca chuatsi culture industry in Anhui Province. [ABSTRACT FROM AUTHOR]

Agricultural products primary processing mechanization is an important basis for the agricultural products primary processing development. We analyzed the agricultural products primary processing mechanization development status by statistical data in Jiangsu Province, the result shows that, the number of agricultural products primary processing machinery ownership and mechanical work volume have shown a sustained growth trend, the agricultural products primary processing mechanization business entities service capacity has been improved, and the service revenue capacity has also continued to be highlighted in recent years. There are some problems in the agricultural products primary processing mechanization development in Jiangsu Province, such as agricultural products primary processing mechanization development unbalanced and insufficient and service capacity insufficient, agricultural products primary processing mechanization popularization and application talents lack, and the efficiency of mechanical operation needs to be improved. In view of the specific problems, this paper puts forward the corresponding countermeasures and measures to promote the agricultural products primary processing mechanization to the higher quality development in Jiangsu Province. [ABSTRACT FROM AUTHOR]

Copyright of Transactions of the Chinese Society of Agricultural Engineering is the property of Chinese Society of Agricultural Engineering and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Electronic Components & Materials is the property of Electronic Components & Materials and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Journal of Engineering for Thermal Energy & Power / Reneng Dongli Gongcheng is the property of Journal of Engineering for Thermal Energy & Power and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

In-pond raceway system (IPRS) that was introduced from the United States by American Soybean Association in 2014, and it has been rapidly applied in recent years. It has realized the transformation of aquaculture model from traditional low-efficiency culture to high efficient culture. Many problems that limit the further integration of aquaculture management have not been studied in depth due to the short application time. In order to explore the distribution of flow field of raceway and the solid phase distribution characteristics of waste settling zone in the culture unit of in-pond raceway system, in this study, the data were simulated by dense discrete phase model (DDPM) based on computational fluid dynamics (CFD) and then were analyzed to form the liquid phase velocity contours, liquid phase velocity path lines and solid-phase distribution characteristics. Firstly, the mesh of culture units was constructed by ICEMCFD software. Secondly, the velocity of flow and nine groups of total suspended solids with different particle sizes were simulated with DDPM using numerical simulation software of FLUENT. In this simulation, the boundary condition of the air inlet was set to the speed, and the other exits were regarded as the pressure outlet. Three-dimensional n-s equation and uncoupled implicit scheme were used for discretization using finite volume method. A three-dimensional equation and a non-coupling implicit scheme discretized by a finite volume method was used, a standard k-ε two-equation turbulence model was selected, and a phase coupled SIMPLE algorithm was used as a numerical solution method in the separation pressure correction method in this study. The default standard format was selected in the pressure term of the velocity correction equation. The standard format, the diffusion term, the source term, and the convection term were all separated by a first-order upwind difference format. The velocity distribution of raceway in culture unit was detected by current meter, and the image for particle deposition in waste settling zone was scanned by a sonar scanning imager. The root mean square error (RMSE) between simulated value and measured value was 0.013 m/s. The water flow in raceway was in a slow-flow state. The high-speed flow field in the water surface area was pushed by the gravity and inertia along the length of raceway from the liquid surface to the bottom and then tended to be stable after reaching the bottom. During the sweeping process, the water flow formed an inherent backflow region between the front retaining wall and the bottom of raceway and the characteristic length of the backflow region was linear with the average flow velocity of the water inlet. The solid phase particles moved with the flow field along inside wall on both sides of the raceway. The solid phase particles were deposited in a U-shape after entering the waste settling zone which corresponding to each raceway. The deposition ratio of solid particles larger than 1.3 mm was over 85%, while the deposition ratio of solid particles smaller than 0.6 mm was less than 44.13%, and the total deposition ratio was 37.77%. The study showed that the influence of the design of the in-pond raceway system on the solid-phase particle deposition can be evaluated preliminarily by using DDPM, the deposition effect of waste settling zone on solid particles smaller than 0.6 mm in diameter was not ideal in this system. [ABSTRACT FROM AUTHOR]

Copyright of Journal of Guangdong University of Technology is the property of Journal of Guangdong University of Technology and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)