Kabushiki Kaisha Toshiba

Yasuhiko Nagamori

Nobuyuki Ashikaga

Masahiko Tsutsumi

Takumi Obara

Hiroshi Tamura

Katsuya Yamamoto

Masato Oda

Shinobu Moniwa

Takashi Menju

Satomi Ebihara

Osamu Yamanaka

Masajiro Nakada

Akihiro Nagaiwa

Hiroyuki Tokimoto

Tetsuya Shinohara

Hiroshi Yuuki

Masaki Kunimi

Kazuhiro Horie

Yukio Hatsushika

Toshiharu Ishihara

Takayuki Ishige

Miyuki Momiji

A carbon dioxide recovery system according to the present embodiments includes: an absorber bringing exhaust gas containing carbon dioxide into contact with absorbent reversibly absorbing or releasing carbon dioxide at above or below a predetermined temperature, and making the absorbent absorb carbon dioxide in the exhaust gas; a regenerator releasing carbon dioxide in the absorbent by heating the absorbent absorbing carbon dioxide at the absorber; a reflux pipeline flowing back the absorbent regenerated at the regenerator to the absorber; and a filter introducing at least a part of the absorbent, removing solids accumulated in the introduced absorbent, and returning the absorbent after the solids are removed to a vicinity of a portion where the absorbent is introduced.

Carbon dioxide recovery system

Disclosed is an apparatus for removing dissolved hydrogen sulfide, including an anaerobic treatment tank () that anaerobically treats organic discharged water, a circulation water tank (), means for introducing organic discharged water into circulation water, a treated-water tank () that temporarily stores anaerobically treated water, a biological desulfurization tower () that desulfurizes biogas formed by anaerobic treatment, air feeding means for feeding air to the biological desulfurization tower (), water feeding means for feeding water to the biological desulfurization tower (), first aerating means () for blowing a part of biologically desulfurized gas from the biological desulfurization tower (), into the treated-water tank (), and second aerating means () for blowing exhaust gas discharged from the treated-water tank () into a solution circulating between the anaerobic treatment tank () and circulation water tank ().

Apparatus for removing dissolved hydrogen sulfide in anaerobic treatment

An aeration-less water treatment system includes an anaerobic treatment tank which subjects sewage supplied by a pump to anaerobic treatment by causing the sewage to upflow, and an aerobic treatment tank which subjects anaerobically treated water to aerobic treatment by letting the anaerobically treated water to downflow by natural downflow. The aerobic treatment tank includes an aerobic filter bed section in which carriers to which aerobic microorganisms are adhered are arranged. The aerobic filter bed section subjects the anaerobically treated water to decomposition treatment by putting the anaerobic treatment water in contact with the aerobic microorganisms adhered to surfaces of the carriers. The aerobic filter bed section is provided with an air port which takes in air into under normal pressure, thereby activating the aerobic microorganisms.

Water treatment system

A treated water quality control system (,) has a sewage inflow estimating unit (,) for estimating an inflow of sewage and a process data storage unit (,) for storing process data on a sewage treatment plant (,). An estimated sewage inflow estimated by the sewage inflow estimating unit (,) and process data read from the process data storage unit (,) are given to a manipulated variable calculating unit (,). The manipulated variable calculating unit (,) calculates values of manipulated variables to be used by a process controller (,) for controlling the sewage treatment plant (,). The values of the manipulated variables calculated by the manipulated variable calculating unit (,) and the process data read from the process data storage unit (,) are given to a process condition estimating arithmetic unit (,). Data on estimated process conditions estimated by the process condition estimating arithmetic unit (,) is given to the manipulated variable calculating unit (,), and then the manipulated variable calculating unit (,) calculates values of the manipulated variables again.

Apparatus for controlling quality of treated water

Growing community of inventors

Fuchu, Japan

Yasuhiko Nagamori