Hydrolysis of palm stearin oil by a thermostable lipase in a draft tube-type reactor

1995 ◽  
Vol 80 (4) ◽  
pp. 340-345 ◽  
Author(s):  
Masanobu Tanigaki ◽  
Masaru Sakata ◽  
Hitoshi Takaya ◽  
Koji Mimura
1998 ◽  
Vol 38 (1) ◽  
pp. 319-326
Author(s):  
Taku Fujiwara ◽  
Iso Somiya ◽  
Hiroshi Tsuno ◽  
Yoshio Okuno

The effect of the ratio of draft tube diameter to reactor diameter (Di/Do) on the efficiency of nitrogen removal from domestic sewage is discussed based on liquid-circulating flow rate and continuous treatment data. More than 2.5 minutes of circulation time in the annulus part, which is required to create an anoxic zone, could be maintained under operating conditions in which air flow rate per reactor volume was 2 m3/(m3 · hr) and Di/Do was 0.19. When Di/Do was set at 0.19, the average total organic carbon (TOC), total nitrogen (TN) and dissolved nitrogen (DN) removal efficiencies were 83.2%, 72.1% and 71.6%, respectively, which were higher than those when Di/Do was at 0.26 or 0.36. From these results, it is concluded that 0.19 is the best Di/Do for nitrogen removal in a draft-tube type reactor with an effective depth of 4.0m under the treatment condition in which the BOD volumetric loading rate is in the range 0.22 to 0.46 kgBOD/(m3 · day). More than 80% nitrification and denitrification efficiencies can be achieved simultaneously when both conditions, the aerobic zone ratio being more than 0.2, and the anoxic zone ratio being more than 0.3, are satisfied.


1997 ◽  
Vol 8 (1) ◽  
pp. 73-84 ◽  
Author(s):  
Takashi Ogihara ◽  
Masaki Yabuuchi ◽  
Teruaki Yanagawa ◽  
Nobuo Ogata ◽  
Koukichi Yoshida ◽  
...  

2000 ◽  
pp. 23-34 ◽  
Author(s):  
Taku FUJIWARA ◽  
Isao SOMIYA ◽  
Hiroshi TSUNO ◽  
Yoshio OKUNO

2013 ◽  
Vol 115 (5) ◽  
pp. 564-570 ◽  
Author(s):  
Yang Xu ◽  
Shaohua Guo ◽  
Weifei Wang ◽  
Yonghua Wang ◽  
Bo Yang

1994 ◽  
Vol 31 (9) ◽  
pp. 620-625 ◽  
Author(s):  
Takashi OGIHARA ◽  
Masaki YABUUCHI ◽  
Teruaki YANAGAWA ◽  
Nobuo OGATA ◽  
Koukichi YOSHIDA ◽  
...  

2014 ◽  
Vol 174 (5) ◽  
pp. 1859-1872 ◽  
Author(s):  
Nayeli Ávila-Cisneros ◽  
Susana Velasco-Lozano ◽  
Sergio Huerta-Ochoa ◽  
Jesús Córdova-López ◽  
Miquel Gimeno ◽  
...  

Author(s):  
B. Lekakh ◽  
K. Hau ◽  
S. Ford

The Advanced CANDU Reactor™ (ACR™) is a Generation III+ pressure tube type reactor using light water coolant and heavy water moderator. The ACR-1000 reactor design is an evolutionary extension of the proven CANDU reactor design. The ACR-1000 incorporates multiple and diverse passive systems for accident mitigation. Where necessary, one or more features that are passive in nature have been included for mitigation of any postulated accident event. This paper describes how the use of passive design elements complements active features enhances reliability and improves safety margins.


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