Sewage treatment device

Abstract

The present invention provided an apparatus for treating wastewater wherein an excess sludge separated by a settling separation tank can be surely recovered by a simple structure, and deterioration of treated water quality can be prevented. The apparatus for treating wastewater is equipped with a solid and liquid separator wherein wastewater containing garbage crushed by a disposer is separated into a solid content and liquid content; an apparatus for making compost for treating the solid content separated by the solid and liquid separator; a wastewater treating tank for treating the liquid content separated by the solid and liquid separator; a settling separation tank for settling and separating a sludge content contained in treated water from a wastewater treating tank; and a transfer means for transferring the sludge settled in the settling separation tank to the apparatus for making compost.

Description

technical field [0001] The invention relates to a drainage treatment device, in particular to a drainage treatment device for treating kitchen garbage drainage. Background technique [0002] In the past, in Japanese No. 10792 / 1996 Patent Application Publication (C02F3 / 30) etc., it is disclosed that the waste water of the kitchen waste disposer is separated into solid components and liquid components with a solid-liquid separation device, and the solid components are put into the composting device, A treatment method in which the liquid component is directly poured into the wastewater treatment tank, and the residual sludge in the treated water from the wastewater treatment tank is sedimented and returned to the solid-liquid separation device (the first embodiment of the above-mentioned publication). In addition, the above publication also discloses a method of transferring the liquid component separated by the solid-liquid separation device to the waste water treatment tank ...

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Problems solved by technology

[0004] However, due to the simplification of the structure, for example, as disclosed in the first embodiment of the above-mentioned publication, when there is no flow regulating tank, when the liquid components separated by the solid-liquid separation device are directly dropped into the treatment tank, a simple structure such as a screen is used. It is difficult to separate the return sludge with very fine particles into solid components and liquid components, and the residual sludge will flow into the treatment tank without recycling, which often deteriorates the quality of the treated water.

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