Treatment method and treatment equipment for wastewater in animal husbandry processing plant

Abstract

The invention relates to a treatment method and treatment equipment for wastewater in an animal husbandry processing plant. The treatment method comprises the following steps: introducing the wastewater discharged from the plant into a flotation tank (DAF) through a flocculation pipe; discharging first-stage DAF wastewater obtained in the floatation tank, and introducing the first-stage DAF wastewater into the floatation tank again through a circulating pipeline; and discharging second-stage DAF wastewater obtained in the floatation tank to obtain a clarified wastewater product. The treatment equipment comprises the floatation tank, a first flocculation pipe, a second flocculation pipe, a circulation pipeline and a contact tank, wherein one end of the circulation pipeline is connected with a water outlet of the floatation tank, the other end of the circulation pipeline is connected with a water inlet of the floatation tank, and first-stage DAF wastewater circulation treatment is achieved. According to the invention, the problems in the process of treating wastewater by using chemical substances in the prior art are solved, the condensation or precipitation of a large amount of solids in a wastewater treatment process is avoided, influence on later biological treatment is avoided, wastewater treatment efficiency and quality are improved, and wastewater treatment cost is reduced.

Description

technical field [0001] The invention relates to the technical field of waste water treatment, in particular to a method for treating waste water in animal husbandry processing plants and treatment equipment thereof. Background technique [0002] The wastewater quality of animal husbandry processing plants is characterized by high concentration of organic matter and suspended solids, and it is easy to corrupt and has low toxicity. In addition, there are a large number of harmful microorganisms in the wastewater. If it is not treated scientifically and effectively, the wastewater will cause eutrophication and consume A large amount of dissolved oxygen in the water leads to the death of aquatic organisms. The suspended matter in the wastewater sinks to the bottom of the water, producing odorous gas and polluting the water environment. Harmful microorganisms and eggs of diseased insects in wastewater can cause the spread of diseases and cause serious damage to the ecological en...

AI Technical Summary

Problems solved by technology

Harmful microorganisms and diseased insect eggs in wastewater can cause the spread of diseases and cause serious damage to the ecological environment and human health

[0003] Currently, many livestock processing plants either process or discharge wastewater that is often contaminated with toxins or biocides that are not compatible with downstream biological treatment processes employed by government or municipal treatment systems

These include the following pollutants: peracetic acid (PAA), quaternary ammonium compounds (Quat), hydrogen peroxide, chlorine, chloramines, chlorinated organics; most processing plants will use chemical treatment methods, and chemicals are released into waterways Before the general water level system, it may cause further complications in the downstream treatment of wastewater, especially when the downstream wastewater treatment system adopts biological treatment or filtration treatment, these chemicals will cause the following problems: the pollution of wastewater needs to be discharged before discharge Further purification; some chemicals are toxic to industrial wastewater treatment systems and direct discharge into the general water stream should be avoided; chemicals employed can cause coagulation and precipitation of large amounts of solids during wastewater treatment and require additional costly and time-consuming treatment process; chemicals may inhibit downstream wastewater treatment systems that rely on biological treatment to treat such wastewater

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