Toyo Engineering Corporation

Water Re-use Promotion Center

Sumitomo Electric Industries, Limited

Ebara Corporation

Hiroaki Ikebe

Masayuki Uchida

Toru Morita

Masaaki Sakurai

Hiroshi Yokohata

Toshio Tsukamoto

Hitoshi Betchaku

Takaji Akiya

A method of produced water treatment in an in-situ recovery method of producing bitumen from oil sand, the method has the steps of: separating bitumen from bitumen-mixed fluid so as to leave produced water, the bitumen-mixed fluid having been recovered from the oil sand wells; and filtering the produced water via a microfiltration membrane made of polytetrafluoroethylene.

Method of produced water treatment, method of water reuse, and systems for these methods

A method of treating a wastewater, containing the steps of: filtering a wastewater supplied into an activated sludge tank and biologically-treated therein, in a membrane module installed outside the activated sludge tank; chemical-cleaning the membrane module with a membrane-cleaning agent while the membrane module is disconnected from the activated sludge tank with a valve; and water-flushing off the substances contained in the wastewater that react with the membrane-cleaning agent and form hazardous substances and/or operation-inhibiting substances, or the membrane-cleaning agent remaining in the membrane module with water while the membrane module and the activated sludge tank are disconnected from each other by the valve, wherein the membrane-cleaning agent is prevented from contacting the substances contained in the wastewater that react with the membrane-cleaning agent and form hazardous substances and/or operation-inhibiting substances.

Method of treating wastewater

A method for treating a formaldehyde-containing waste liquid, which is formed as a byproduct in a plant for the production of hydrocarbons or oxygen-containing compounds, containing the steps of: subjecting formaldehyde in the liquid to chemical treatment; and treating the resulting waste liquid, while being aerated, by using a membrane bioreactor that is composed of a microorganism or enzyme and a separation membrane.

Method of treating waste liquid from production plant for hydrocarbons or oxygen-containing compounds

A method of treating organic matter-containing waste liquid, which is formed as a byproduct in a plant for the production of oxygen-containing compounds or liquid hydrocarbons (including liquid fuel oil and chemicals, which are produced from natural gas through a synthetic gas), having the step of: treating the waste liquid at a high temperature of 40&#xb0; C. or higher, while being aerated, by using a membrane bioreactor () that is equipped with a separation membrane ().

Method of treating at a high-temperature waste liquid from production plant for hydrocarbons or oxygen-containing compounds

Growing community of inventors

Narashino, Japan

Hiroaki Ikebe