Kabushiki Kaisha Toshiba

Takumi Obara

Nobuyuki Ashikaga

Hiroshi Tamura

Katsuya Yamamoto

Masahiko Tsutsumi

Yasuhiko Nagamori

Takashi Menju

Takayuki Ishige

Miyuki Momiji

Toshiharu Ishihara

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 apparatus including an anaerobic reactor which receives sewage to cause the sewage to flow as an upward stream, and an aerobic reactor which receives treated water from the anaerobic reactor to cause the water to flow as a downward stream so that the water contacts aerobic microorganisms and air to aerobically treat the polluted matter in the water, the apparatus further including a suspended sludge section located in a lower part of the anaerobic reactor and in which the anaerobic microorganisms are suspended in the sewage, and a carrier section located in an upper part of the anaerobic reactor and having carriers to which the anaerobic microorganisms are attached, the anaerobic microorganisms having flowed from the suspended sludge section being further attached to the carriers.

Aeration-less water treatment apparatus

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

Growing community of inventors

Fuchu, Japan

Takumi Obara