An integrated treatment device and method for livestock and poultry slaughtering, domestic sewage and cooked food processing wastewater

Abstract

An integrated treatment device for livestock and poultry slaughtering, domestic sewage and cooked food processing wastewater, wherein the sewage from the slaughtering workshop passes through the mechanical grid channel a, grit chamber, preconditioning tank, oil separation sedimentation tank, mixing tank, etc. Condensation tank, air flotation tank, buffer tank, regulating tank, UBF anaerobic tank, hydrolysis tank, aerobic tank, intermediate sedimentation tank, contact oxidation tank, secondary sedimentation tank, disinfection tank, clean water tank, the domestic sewage and cooked food workshop sewage After being collected together, they pass through the mechanical grille ditch b of the treatment device and then enter the pre-conditioning tank and collect the sewage from the slaughterhouse. The treatment device also includes a sludge concentration tank, a sludge conditioning tank, and a centrifugal dehydrator connected in sequence b, the sludge from the oil separation sedimentation tank, air flotation tank, UBF anaerobic tank, intermediate settling tank, and secondary settling tank flows into the sludge concentration tank, and a tank is connected between the air flotation tank and the sludge adjustment tank The scum tank, the scum in the air flotation tank enters the sludge regulating tank through the scum tank. The device operates stably, and the water quality after treatment meets the discharge requirements of the first-class standard.

Description

technical field [0001] The invention relates to the technical field of wastewater treatment, in particular to a treatment device and method for livestock and poultry slaughter, domestic sewage and cooked food processing wastewater. Background technique [0002] Wastewater from livestock and poultry slaughtering and cooked food processing generally comes from livestock and poultry slaughtering workshops, cooked food processing workshops and domestic sewage. Slaughtering workshop wastewater mainly comes from scalding wastewater and cleaning wastewater, which contain a certain amount of mud, sand, suspended organic matter, protein, miscellaneous hair, grease, meat scraps and red hemoglobin; cooked food processing workshop wastewater mainly comes from raw material cleaning section , production section, packaging and forming section, these wastewaters contain a large amount of suspended organic matter, dissolved organic matter, fried oil and food additives; domestic sewage mainly...

AI Technical Summary

Problems solved by technology

These wastewaters have the following characteristics: 1) There are many impurities such as food waste and sediment in the wastewater; 2) The intermittent discharge of wastewater fluctuates greatly, and the water quality and quantity will change with the seasons; 3) There are many oily substances in the wastewater, which are easy to form Scum and foam; 4) Wastewater contains various microorganisms, including pathogenic microorganisms. Wastewater is easy to be corrupt and smelly, slightly acidic, and has a strong smell; 5) Wastewater contains fungicides and is discharged intermittently, which has an impact on biochemical treatment; 6 ) Although the ammonia nitrogen in wastewater is not high, it contains organic nitrogen such as protein, such as ammonia nitrogen will increase after anaerobic hydrolysis

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