Nkk Corporation

Jfe Engineering Corporation

School Judicial Person Ikutokugakuen

Orientnano Co., Ltd.

Toshiaki Tsubone

Shinichi Endo

Jun Miyata

Kei Baba

Tatsuo Takechi

Yoshinori Yomura

Yukihiko Okamoto

Satoru Udagawa

Toshiya Momiyama

Yukihito Konno

Toyoshi Yamaguchi

Kunio Miyazawa

Yasuki Yao

Masahisa Tanabe

Provided is a microbial flora activator which can prevent the re-bonding of a dispersed oil, fat or the like and can activate microorganisms in an activated sludge treatment system; and a method for treating wastewater containing an oil, a fat or the like using the microbial flora activator.

Microbial flora activator and its use in treating wastewater containing oil and fat

A method and an apparatus for treating organic wastewater and sludge which remarkably reduce the generated amount of sludge at a much lower running cost, and which reduce the size and the capacity of the solubilization tank. The method and apparatus for treating sludge employs a biological treatment system, wherein a biological treatment of wastewater is carried out, and a solid-liquid separation unit for separating a solid from a liquid in the wastewater after the biological treatment, to obtain a treated wastewater and a sludge. The apparatus has a means for obtaining a withdrawn sludge from a part of the sludge and an alkali-treatment tank, wherein an alkali-treatment of the withdrawn sludge is carried out. The apparatus also has a biological solubilization tank which solubilizes the sludge after the alkali-treatment under an anaerobic, anoxic or microaerophilic condition, and a means for recycling the solubilized sludge to the biological treatment system.

Method for treating wastewater and sludge

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

Toshiaki Tsubone