Slaughter house sewage treatment process

Abstract

The invention belongs to the field of sewage treatment, and particularly relates to a slaughter house sewage treatment process which comprises the following steps: after slaughter wastewater passes through a coarse screen well, the wastewater treated by an oil separation tank enters a fine screen well, effluent enters an adjusting tank, the effluent is lifted by a pump to enter an air flotation machine, and COD is reduced and suspended solids and floating oil substances are removed by adding a flocculating agent; effluent of the air floatation machine enters an adjusting and hydrolyzing tank,and effluent of the adjusting and hydrolyzing tank enters a subsequent anoxic tank; effluent of the anoxic tank enters an aerobic tank, and organic matters in the wastewater aredecomposed into CO2 andwater by utilizing aerobic microorganisms under an aeration condition; wastewater is subjected to two-stage aerobic treatment and then automatically flows into a sedimentation tank, the wastewater issubjected to sludge-water sedimentation separation in the sedimentation tank, supernatant enters a subsequent disinfection tank, sludge at the bottom of the sedimentation tank enters a sludge tank, asludge-water mixture in the middle of the sedimentation tank returns to the anoxic tank, and effluent of the sedimentation tank enters the disinfection tank and is subjected to deodorization, decoloration, sterilization and disinfection treatment through ultraviolet rays, so that residual organic matters and inorganic matters in the wastewater are removed.

Description

technical field [0001] The invention belongs to the field of sewage treatment, and in particular relates to a slaughterhouse sewage treatment process. Background technique [0002] The wastewater in the slaughter process mainly includes (1) wastewater from washing livestock before slaughter; (2) wastewater from scalding and washing carcasses; (3) wastewater from cleaning viscera; (4) wastewater from washing workshop floor and equipment; (5) washing pens Wastewater; (6) Wastewater generated during meat processing. Slaughter wastewater has a high content of organic suspended matter and is easily corrupted. Discharging into water will consume dissolved oxygen in the water, destroy the ecosystem and pollute the environment. The water is reddish brown and has obvious fishy smell, which is a typical organic sewage. Sewage generally does not contain heavy metals, toxic chemicals, protein and grease, and high salt content. The removal efficiency of the conventional slaughtering w...

AI Technical Summary

Problems solved by technology

Conventional slaughter wastewater treatment process has low removal efficiency and cannot achieve the ideal treatment effect

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