Sharp Kabushiki Kaisha Corporation

Takashi Fujiwara

Kazuyuki Yamasaki

Shirou Imazu

Takashi Imai

A waste water treatment method and apparatus uses microorganism-containing sludge to treat waste water containing fluorine and does not utilize any chemical reaction. For waste water treatment, a treatment tank has an anaerobic part having sludge containing microorganisms and an aerobic part having sludge containing microorganisms and communicating with the anaerobic part. Waste water to be treated and biological excess sludge are introduced into the anaerobic part. Once treated by the microorganisms, the water is filtered by a membranous separation device in the aerobic part, and output as treated water. In the treatment tank, the microorganisms are moved between the anaerobic part and aerobic part to enhance their ability to concentrate or accumulate therein fluorine or other substances contained in the waste water.

Method and apparatus for biologically treating waste water containing fluorine

The apparatus for waste water treatment has, in a tank, a contact circulation part in which Bincho charcoal is accommodated, a sprinkling circulation part which is disposed above the contact circulation part and in which black coal is accommodated, air lift piping for lifting treatment-object water from the contact circulation part to the sprinkling circulation part, a water-sprinkling tube for sprinkling the treatment-object water onto the sprinkling circulation part, an aquatic plant cultivation bed disposed between the contact circulation part and the sprinkling circulation part, and air-diffusing tubes for introducing malodorous gas. Small quantity of surfactants and colorants are adsorbed by the Bincho charcoal and the black coal and decomposed by microorganisms that have grown in the Bincho charcoal and the black coal. The microorganisms act to biologically decompose the malodorous gas.

Growing community of inventors

Ashina-gun, Japan

Takashi Fujiwara