Combined slaughtering wastewater pretreatment device and operation method thereof

Abstract

The invention relates to the technical field of environment-friendly sewage treatment, in particular to a combined slaughtering wastewater pretreatment device and an operation method thereof. The pretreatment device comprises an air flotation machine case body, wherein the top of the air flotation machine case body is in an open state; one side of the air flotation machine case body is provided with a ladder climbing platform; and one side of the top of the air flotation machine case body is provided with a screening box body. According to the invention, inlet water passes through the screening box body, and solid suspended matter in the inlet water passes through a screening part of the combined slaughtering wastewater pretreatment device; then the scum is separated out; and the water enters into a dissolved air box body. Through a structure of small surface clearance and large back clearance of a strip-shaped screen, blockage is not easily caused, and the strip-shaped screen is usedas the screening part. When slag discharge is not smooth, flushing water is utilized to assist slag discharge, so that slag discharge equipment is reduced, and the problem that slag discharge is not smooth is solved. The pretreatment device and method are suitable for the slaughtering industry, and is also suitable for the papermaking industry, the chemical fiber industry, the textile printing anddyeing industry, alcohol factories, the slaughtering industry, the meat processing industry, the meat processing industry and the like.

Description

technical field [0001] The invention relates to the technical field of environmental protection sewage treatment, in particular to a combined slaughter wastewater pretreatment device and an operating method thereof. Background technique [0002] The incoming water pollutants and solid impurities in slaughterhouse sewage are complex. It is often necessary to combine several unit treatment operations into an organic whole, and rationally configure their primary and secondary relationships and sequence in order to complete the treatment task most effectively. Whether the pretreatment unit can effectively remove the floating matter and sediment is crucial to ensure the normal operation of the entire sewage treatment system. In reality, the processes or equipment used as slaughter sewage pretreatment units include grilles, microfilters, hydraulic sieves, air flotation machines, oil separation settlers, primary sedimentation tanks, etc. [0003] The grille is mainly used to remov...

AI Technical Summary

Problems solved by technology

However, the primary sedimentation tank occupies a large area, has low efficiency and high investment cost

[0009] In reality, there are the following problems in the process or equipment such as grille, microfilter, hydraulic sieve, air flotation machine, oil separation sedimentator, primary sedimentation tank, etc. used as the pretreatment unit of slaughter sewage: (1) the pretreatment process or equipment function list; (2) The problem of poor air flotation effect or easy blockage; (3) There are many suspended solids in the water

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