Method for treating dead pig chemical wastewater

Abstract

The invention relates to the technical field of sewage treatment, in particular to a dead pig chemical wastewater treatment method, which uses a water collecting tank, a regulating tank, an anaerobictank, a facultative tank, an aerobic tank, an MBR membrane tank, a DTRO reverse osmosis membrane group and a multi-effect evaporator, and comprises the following specific steps: S1, wastewater collection: firstly, physically filtering wastewater generated in the whole treatment process of pigs died of illness, then injecting the filtered wastewater into an oil-water separator for oil-water separation, and injecting the wastewater subjected to oil-water separation into a water collecting tank through a sewage pump for collection; and S2, preliminary treatment: collecting the wastewater in S1 inthe water collecting tank; pumping the wastewater in the interior of the water collecting tank into the regulating tank through the sewage pump to obtain neutral wastewater. Through the design, the difficult problem that a traditional biochemical method and A2O-MBR equipment are difficult to treat wastewater of pigs died of illness due to the characteristics of high ammonia nitrogen and high saltis overcome, under the assistance of a DTRO reverse osmosis process, the process is relatively simple, and the processed wastewater can reach the standards.

Description

technical field [0001] The invention relates to the technical field of sewage treatment, in particular to a method for treating sick and dead pig chemical waste water. Background technique [0002] In recent years, along with the large-scale and standardized development of pig breeding, the harmless treatment of sick and dead pigs has been increasingly concerned by the government and the public because it is related to the sustainable development of agriculture and the microbiological safety of the public environment. At present, sick and dead pigs are harmless Chemical treatment processes are mainly divided into incineration, chemical production, chemical hydrolysis, high temperature biological degradation, etc. Among them, the chemical method is simple in operation, fast in processing speed, and high in efficiency. It is a commonly used treatment process for sick and dead pigs. The specific operation process is to mechanically crush the dead pig carcasses, cook them under ...

AI Technical Summary

Problems solved by technology

Therefore, the coupling of MBR and DTRO technology will be able to meet the standard treatment of sick and dead pig chemical wastewater. Due to the high salt content in the wastewater, the total return reverse osmosis concentrate will inhibit the biochemical reaction of microorganisms, and the energy consumption of evaporating and crystallizing all the concentrate is high.

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