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US 4,045,344 AGranted
Apparatus for treating waste water
AssigneeIshigaki Kiko Co., Ltd.
InventorIttshu Yokota
Life of this patent
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AssigneeIshigaki Kiko Co., Ltd.
InventorIttshu Yokota
Estimating the term…
An apparatus for treating waste water such as sewage in which at least one bundle of a number of straight tubes is submerged in waste water to be treated, said bundle being particularly provided with a plurality of crossing passages extending across the bundle which passages are arranged intermittently along the bundle with certain intervals therebetween so that no Poiseuille flow is substantially formed in each of the tubes. The waste water is flowed through the bundle of straight tubes in a direction along the bundle. In the bundle of straight tubes, organic substances in the waste water are removed due to decomposition caused by microorganisms which adhere to the inner surface of each tube. Owing to the presence of the crossing passages, removal of the organic substances proceeds effectively and promptly due to uniform flow distribution across the bundle, a disturbance of flow given to the water, propagation of various kinds of microorganisms and the like.
An apparatus for treating waste water comprising at least one treating tank having an inlet for waste water and an outlet for treated water, at least one bundle of a number of straight tubes arranged in said treating tank so that the bundle is submerged in waste water to be treated in the tank, said bundle being provided with a plurality of crossing passages extending across the bundle which passages are arranged intermittently along the bundle with certain intervals therebetween so that each of the tubes is divided into a plurality of tube sections each having a length such that the length is substantially covered with a flow-disturbed portion due to flowing-in of water and another flow-disturbed portion due to flow-out of water in each tube section, and means for flowing waste water through said bundle in a direction along the bundle.
Dependencies are inferred from the claim text.