NOVELTY - The wastewater treatment equipment has a residue treatment tank (2), an activation tank (3), a trap tank (4), an aeration unit (7), a bio-formulation supplying unit (12) and a suspended substance discharge port (8) joined to residue treatment tank via a tubular shape component (10). Aeration unit is installed at sidewall (14a) of tank (3), and generates circular arc-shaped circulating flow using circulating water.    USE - For treating wastewater ejected from kitchen, restaurant, hotel, foodstuffs factory and gasoline station.    ADVANTAGE - The wastewater treatment equipment efficiently removes oil and fat contained in wastewater. The aeration unit generates a smooth circulating flow. The contacting efficiency of oil, fat and microorganism is improved by increasing the dissolved oxygen amount in circulating water, and hence disintegration of oil and fat is promoted. The treated water is reliably ejected from wastewater treatment equipment.    DETAILED DESCRIPTION - The wastewater treatment equipment has a residue treatment tank (2), an activation tank (3), a trap tank (4), an aeration unit (7), a bio-formulation supplying unit (12) and a suspended substance discharge port (8) joined to residue treatment tank via a tubular shape component (10). The residue treatment tank removes solid residue contained in wastewater. The activation tank decomposes and removes oil and fat contained in circulating water by floatation, and is connected with lower portion of residue treatment tank. The trap tank is connected with lower portion of activation tank, and ejects circulating water containing decomposed oil and fats. The aeration unit is installed at inner side sidewall (14a) of activation tank, and generates circular arc-shaped circulating flow using circulating water. The discharge port, which is positioned at circulating water upper surface, is provided at upper vicinity of activation tank.    DESCRIPTION OF DRAWING(S) - The figure shows a longitudinal cross-sectional view of wastewater treatment equipment.    Residue treatment tank (2)    Activation tank (3)    Trap tank (4)    Aeration unit (7)    Suspended substance discharge port (8)    Tubular-shape component (10)    Bio-formulation supplying unit (12)    Side wall (14a)