Ngk Insulators, Inc.

Hitoshi Yonekawa

Nobuhiro Aoki

Naoki Murata

Yasuko Yoshida

Mitsuo Kawase

Hiroyuki Oyachi

A flush mixing tank is provided with a flocculant mixing section in which a raw water a to be treated is introduced and a flocculant such as known aluminum sulfate or polychlorinated aluminum is injected, and then they are agitated and mixed; and a floc growing section through which flocculant injected water mixed with the flocculant passes, and the flocculant injected water is discharged as a floc treated water, but a water passing member, which is provided with a plurality of water through-holes for promoting the growth of the flocs in the flocculant injected water, is disposed in the floc growing section. Flocs of flocculant injected water can be rapidly formed, and growth of the flocs can be accelerated.

Flocculation apparatus

A filtering method including the steps of preparing a water purifying apparatuswith a cell structurehaving units for constituting cell structure, and a cap portion, and making raw water flow into cellsfrom one end, and filtered by a partition wallsto take out filtrate water from the side of an outer peripheral surface. The cell structureis so constructed that the ratio of maximum value to minimum value in water permeability among the partition wallsprovided therein is within a range from of 110 to 300% in terms of percentage, and the cellslocated on the side of an outer peripheryof the cell structurehave a greater water permeability.

Filtering method

An enzyme-fixed bioreactor, including a reaction column, enzyme-fixed catalyst particles uniformly and densely filled in the reaction column, the catalyst particles being composed of carrier sepiolite particles consisting essentially of sepiolite and an enzyme carried on the surface of the carrier sepiolite particles. The bioreactor has stable heat resistant and chemical properties, high productivity, and is economically superior to prior art, without fear of destruction of the catalyst, short path, and clogging in the reaction column.

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Nagoya, Japan

Hitoshi Yonekawa