The air flow number in flotation machine scale-up

1976 ◽  
Vol 3 (3) ◽  
pp. 257-280 ◽  
Author(s):  
N. Arbiter ◽  
C.C. Harris ◽  
R.F. Yap
1974 ◽  
Vol 26 (S1) ◽  
pp. 76P-76P ◽  
Author(s):  
D. CAMPY ◽  
T. EAVES ◽  
E. M. GRUDZINSKI ◽  
H. E. C. WORTHINGTON

1980 ◽  
Vol 26 (9) ◽  
pp. 1049-1056 ◽  
Author(s):  
H. C. Wah-On ◽  
R. M. R. Branion ◽  
G. A. Strasdine

Production of protease by fermentation, using Sorangium 495, of a substrate based on condensed fish solubles is demonstrated. The effects of carbohydrate addition, pH, fish solubles concentration, scale-up, agitation, and air flow rate on protease yields are described. While the fish solubles medium alone could give rise to measurable yields of protease, these were, at worst, doubled when 1% glucose was added to the medium. pH 7 was optimal for protease yield. Although the concentration of fish solubles in the basic medium showed no significant effect on cell yield, maximum protease yield was observed at a protein concentration equivalent to 3.85 mg/mL of bovine serum albumin. Protease production rates decreased as medium protein concentration increased. Scale-up from 100 mL in shake flasks to 4 L in a stirred, sparged fermentor showed no significant effect on maximum protease yields. The effects of agitator speed and air flow rate on protease yield suggested that the rate of O2 transfer from air to medium could limit the rate of protease production. It was also noted that protease production is not growth associated.


2020 ◽  
Vol 24 (4) ◽  
pp. 2637-2643
Author(s):  
Hao Dou ◽  
Shao-Wen Yao ◽  
Xue Meng ◽  
Wei Fan ◽  
Yun-Yu Li ◽  
...  

Blown bubble-spinning was recently explored for the effective fabrication of nanofibrous yarns in a one-step process. In this study, air-flow?s temperature and velocity, which play the key role in the formation and morphology of nanofibers, are investigated and optimized. The present study offers a beneficial opportunity for the scale-up production of nanofibrous yarns in the future.


2017 ◽  
Vol 5 (2) ◽  
pp. 452-461
Author(s):  
Suryadi ◽  
Sukmawaty ◽  
Guyup Mahardhian Dwi Putra

The available Fluidized Bed dryer has low drying capacity so it is necessary to increase the dimensions to improve the drying capacity. This study aimed to increased the dimensions of the Fluidized Bed dryer, to determined the drying capacity, and to conducted technical tests. This research was conducted at Power and Agriculture Machinery, Faculty of Food and Agroindustrial Technology, University of Mataram. The method used in this research was experimental method with mathematical approach. The parameters used in this study was the scale parameter and technical test parameters. Scale Up Fluidized Bed dryer was done in the drying chamber which includes the dimensions of the drying chamber and drying capacity. Technical testing included air flow velocity, the minimum fluidization velocity, temperature, drying time and space dryer efficiency. The drying chamber is a cylinder with a diameter of 40 cm, height 200 cm and 0.1256 m2 area of the base. The capacity of the Fluidized Bed dryer before Scale Up was 4 kg and the capacity after Scale Up was 8 kg. The speed of air flow through the drying chamber was 3 m/s. The distribution of temperature during the drying process ranges between 40-50℃ and 50-60℃. According to the research, the more the masses drained, the longer the time required to dry the material. The efficiency of the drying chamber mostly present in the temperature range of 50-60℃ with a value of 94.04%.  Keywords: fluidized bed, scale up, technical test ABSTRAK Alat pengering Fluidized Bed yang tersedia memiliki kapasitas pengeringan yang rendah sehingga diperlukan peningkatan ukuran dimensi alat untuk meningkatkan kapasitas pengeringan. Penelitian ini bertujuan untuk meningkatkan ukuran dimensi alat pengering Fluidized Bed, menentukan kapasitas pengeringan dan melakukan uji teknis. Penelitian ini dilakukan di Laboratorium Daya dan Mesin Pertanian Fakultas Teknologi Pangan dan Agroindustri Universitas Mataram. Metode yang digunakan pada penelitian ini adalah metode eksperimental dengan pendekatan matematis. Parameter yang digunakan pada penelitian ini adalah parameter Scale Up dan parameter uji teknis. Scale Up alat pengering Fluidized Bed dilakukan pada bagian ruang pengering yang meliputi dimensi ruang pengering dan kapasitas pengeringan. Uji teknis meliputi kecepatan aliran udara, kecepatan minimum fluidisasi, suhu, waktu pengeringan, dan efisiensi ruang pengering. Ruang pengering berbentuk silinder dengan diameter 40 cm, tinggi 200 cm, dan luas alas 0,1256 m2. Kapasitas alat pengering Fluidized Bed sebelum Scale Up adalah 4 kg dan kapasitas setelah Scale Up sebesar 8 kg. Kecepatan aliran udara yang melewati ruang pengering adalah 3 m/s. Sebaran suhu selama proses pengeringan berkisar antara 40-50℃ dan 50-60℃. Berdasarkan hasil penelitian semakin banyak massa yang dikeringkan semakin lama waktu yang dibutuhkan untuk mengeringkan bahan tersebut. Efisiensi ruang pengering yang paling besar terdapat pada kisaran suhu 50-60℃ dengan nilai 94,04%.   Kata kunci: fluidized bed, scale up, uji teknis


Author(s):  
L.E. Murr ◽  
J.S. Dunning ◽  
S. Shankar

Aluminum additions to conventional 18Cr-8Ni austenitic stainless steel compositions impart excellent resistance to high sulfur environments. However, problems are typically encountered with aluminum additions above about 1% due to embrittlement caused by aluminum in solid solution and the precipitation of NiAl. Consequently, little use has been made of aluminum alloy additions to stainless steels for use in sulfur or H2S environments in the chemical industry, energy conversion or generation, and mineral processing, for example.A research program at the Albany Research Center has concentrated on the development of a wrought alloy composition with as low a chromium content as possible, with the idea of developing a low-chromium substitute for 310 stainless steel (25Cr-20Ni) which is often used in high-sulfur environments. On the basis of workability and microstructural studies involving optical metallography on 100g button ingots soaked at 700°C and air-cooled, a low-alloy composition Fe-12Cr-5Ni-4Al (in wt %) was selected for scale up and property evaluation.


1974 ◽  
Vol 30 (1) ◽  
pp. 32-41 ◽  
Author(s):  
E. J. Butler ◽  
B. J. Egan
Keyword(s):  

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