| 摘要 |
There is provided a chemical tank having a plurality of chemical compartments in which a certain amount of water purification chemical (purification agent; precipitation agent) is added to life wastewater in an agitator, and agitated wastewater is precipitated in a batch type for thereby purifying wastewater. A chemical mixer having a screw coil for turbulent flow of fluid is fixed at an inner wall of a mixing tube having a motor pump for waste water and is connected with a supply tube of liquid chemical.
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