Wastewater-purifying apparatus and wastewater-purifying method

Abstract

The present invention relates to a wastewater-purifying apparatus and to a wastewater-purifying method. The wastewater-purifying apparatus comprises: a stirring unit for feeding a material for forming flocs into inflow water and stirring the resultant material at a high speed so as to enable the flocs to be impregnated with bubbles; an air supply unit for supplying air such that the flocs can be impregnated with more bubbles; a pumping unit for the pressurized transfer of water to be treated; a cyclone unit for separating high-density flocs to a lower stream and separating the water to be treated including low-density flocs to an upper stream; and a floating separation unit for receiving the water to be treated including the low-density flocs and separating the flocs. Thus, the apparatus and method of the present invention have the effects of improving wastewater purification speed and improving the quality of the purified water.

Description

technical field [0001] The present invention relates to a sewage purification device and purification method, and more specifically, relates to a sewage purification device and purification method that allow sewage to flow in, purify impurities contained in the sewage, and discharge the purified purified water. Background technique [0002] Sedimentary pollutants from non-point pollution sources and sewers mainly flow into the purification device with rainwater when it rains. The amount is quite large and often overloads. Therefore, it is discharged to the river in an untreated state and requires rapid treatment in the purification device. [0003] As one of the conventional purification methods, a method of throwing a coagulant or the like into sewage to form flocs and removing only the flocs to purify sewage has been studied. [0004] However, the previous technology has been used only to form a density of 1g / cm 3 The above high-density flocs and their settlement methods ...

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Problems solved by technology

[0004] However, the previous technology has been used only to form a density of 1g / cm 3 The above high-density flocs and their settlement methods or only form density less than 1g / cm 3 And the low-density floc that floats on the water and makes it float

[0005] Therefore, these methods all have the following problems: the formation and removal of flocs take a long time; it is difficult to process pollutants when they flow in at a high concentration; when it rains, when the inflow flow and the concentration of pollutants vary greatly, it cannot be well ground response

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