Harmless wastewater treatment system for animal carcasses and wastewater treatment method

Abstract

The invention discloses a harmless wastewater treatment system for animal carcasses and a wastewater treatment method. The harmless wastewater treatment system comprises a wastewater pretreatment unit, a hydrolytic acidification reactor and an MBBR (moving bed bioreactor)-MBR (membrane bioreactor) combined biological treatment unit, wherein the wastewater pretreatment unit comprises a catalytic ozonation reactor, an activated sludge adsorptive reactor and an ammonia-nitrogen air stripping absorption tower; the MBBR-MBR combined biological treatment unit comprises an anoxic MBBR, aerobic MBBRs and an MBR, aeration devices are arranged in the aerobic MBBRs and the MBR respectively, and a digestive fluid reflux pipeline is arranged between the MBR and the anoxic MBBR. The wastewater treatment method comprises steps of pretreatment, hydrolytic acidification and biological treatment. With adoption of the system and the method, wastewater produced during harmless treatment of the animal carcasses can be sterilized and disinfected, the system and the method adapt to characteristics of the wastewater produced during harmless treatment of the animal carcasses, and the ammonia-nitrogen removal rate is high.

Description

technical field [0001] The invention relates to the technical field of animal corpse harmless wastewater treatment, in particular to a system and a wastewater treatment method for animal corpse harmless wastewater treatment. Background technique [0002] In the harmless treatment of sick livestock, poultry, and animal corpses (hot steam does not directly contact the processed meat corpses, but circulates in the interlayer) for harmless treatment, the hot steam generated during the chemical processing process contains sick and disabled livestock All kinds of organic matter, nitrogen, grease, volatile odor (VOCs) and other components with low boiling points in poultry and animal carcasses form dirty steam, which will produce waste water after being condensed by the vacuum pump station, and the main pollutants in the waste water CODCr, BOD5, NH3-N, animal oil, volatile organic compounds VOCs, etc.; in addition, the harmless treatment of sick and disabled livestock and poultry a...

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Problems solved by technology

[0003] At present, the biological treatment process is mostly used for the production wastewater with acceptable biodegradability, but the traditional biological treatment process has a certain limit for the nitrogen content of the influent (low nitrogen) and is harmful to the source of pathogenic pollution. There are no effective treatment measures for process wastewater, and the characteristics of the wastewater generated during the treatment process and harmless treatment cannot be effectively adapted. The treated wastewater is difficult to meet the national first-level discharge standards. For the bacteria and viruses that may exist in the wastewater when the epidemic occurs There are no effective treatment measures; and the technical civil engineering occupies a large area and the construction period is long

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