Sharp Kabushiki Kaisha Corporation

Hiroshi Makino

Kazuyuki Yamasaki

Kazuyuki Sakata

Noriyuki Tanaka

Takashi Imai

Yoshihiro Hamaguchi

Satoshi Nishio

Kenji Matuura

Shunji Hosoda

Teruaki Nagayasu

Tuyoshi Takahashi

Shigetoshi Okatani

Atsushi Yokotani

Masanori Sanada

The waste water treatment apparatus includes a first water tank which has an upper part and a lower part. The upper part has an air diffuser, and calcium carbonate mineral is packed in the upper part. The calcium carbonate mineral in the upper part is strongly fluidized by aeration by the air diffuser to treat waste water in the upper part through its chemical reaction with the waste water. The calcium carbonate mineral settles in the lower part and serves as an immobilizing carrier for microorganisms to execute microbial treatment of the water.

Apparatus and method for treating waste water both chemically and

An apparatus for waste water treatment, wherein fluorine contained in waste water is treated into a fluoride through a chemical reaction and sludge containing the fluoride is thickened and dehydrated into a sludge cake, has first and second tanks each packed with calcium carbonate mineral. In the first tank, waster water containing fluorine is agitated by air discharged from an air diffuser and caused to react with the calcium carbonate mineral. Through this reaction of the waste water with the calcium carbonate mineral and action of microorganisms on the surface of the calcium carbonate mineral, a pH value and a fluorine concentration of the waste water is adjusted till the pH value and the fluorine concentration fall within their respective predetermined ranges. In the second tank, an aluminum agent is added to the waste water coming from the first tank while the waste water being agitated so that the pH value and the fluorine concentration of the waste water are further adjusted through a chemical reaction of the fluorine with the calcium carbonate mineral and aluminum agent and action of microorganisms propagating on the surface of the mineral so as to fall within their respective target ranges.

Method for waste water treatment using calcium carbonate mineral and

Apparatus for waste water treatment using calcium carbonate mineral and

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Fukuyama, Japan

Hiroshi Makino