Slaughter wastewater purification device

The slaughter wastewater purification device is composed of five parts including a grating area, a flotation area, a hydrolytic acidification area, a contact oxidation area and a settling area, a grating plate is obliquely arranged in the grating area, the right side of the grating area is communicated with the flotation area, an oil residue scraping machine is arranged at the top of the flotation area, and the oil residue scraping machine is communicated with the settling area. An oil residue collecting tank is arranged on the right side above the flotation area, an inclined plate on the left side of the oil residue collecting tank is in contact with a scraping plate, the scraping plate is connected with an oil residue scraping machine, an air dissolving pump is arranged below the flotation area, the right side of the flotation area is communicated with a hydrolytic acidification area through a connecting pipeline, and a first biological filler is arranged in the hydrolytic acidification area; a water distri