Nkk Corporation

Tatsuo Takechi

Shinichi Endo

Toshiaki Tsubone

Kei Baba

Yukihiko Okamoto

Jun Miyata

Satoru Udagawa

Masahisa Tanabe

A method for treating waste water and a plant designed for preventing the precipitation of carriers under the air blower installed for reaction tank or aeration tank, wherein the plant comprises an aeration tank containing the carriers for growing microorganism for biological treatment of waste water or the subunit joined with the aeration tank through a partition wall including the screen capable of separating the carriers , air blower provided for the aeration tank or the subunit of the aeration tank, air bubble generator or submerged stirrer provided under the air blower for creating the flow of water so that the carriers under the blower can be liquidized by the flow of water created by the air bubble generator or the submerged stirrer to prevent the precipitation of the carriers under the air blower , whereby not only the precipitation of the carriers under the air blower can be prevented but also the water treatment efficiency and capacity meeting the designed numerical requirements can be maintained and exerted by the aeration tank.

Method and apparatus for treating waste water

Phosphorus in wastewater is removed by using an apparatus including a settling tank, an anaerobic tank, an aerobic tank, and a final settling tank. Nitrogen in wastewater is removed by using an apparatus including a settling tank, an anaerobic tank, a nitrification tank, and a final settling tank.

Apparatus for wastewater treatment

Growing community of inventors

Tokyo, Japan

Tatsuo Takechi