Toshiba Ceramics Co., Ltd.

Other

Toshiro Minami

Takashi Ogawa

Takeshi Kobayashi

Yoshihisa Katoh

Shinji Iijima

Shunji Yasuda

A ceramic filter containing low humidity is applied to a process for filtering of liquid nitrogen without employing a vaporizing step. An apparatus is provided for carrying out the process and includes a filter device of a ceramic filter containing relatively low humidity and having specific pore diameters and pressure regulators on both sides of the filter.

Filtration apparatus

A method comprising passing a culture solution including Bacillus subtilis or gene-recombinated Bacillus thereof through a pipe-like ceramic filter at a flow rate of 2 m/sec or less, the ceramic filter having a filter layer at an inner cylindrical surface thereof, the filter layer being made of spherical particles, and a surface roughness (Rmax) of the inner surface of the ceramic filter being 10 microns or less.

Method for filtering Bacillus subtilis

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Nagoya, Japan

Toshiro Minami