Integrated treatment device and method for livestock slaughtering and domestic sewage and cooked food processing wastewater

Abstract

The invention discloses an integrated treatment device for livestock slaughtering and domestic sewage and cooked food processing wastewater. Sewage from a slaughtering workshop passes through a mechanical grid ditch a, a sand settling basin, a pre-adjustment basin, an oil isolation settling basin, a coagulation basin, an air floating basin, a buffering basin, an adjustment basin, a UBF anaerobic basin, a hydrolysis basin, an aerobiotic basin, a middle settling basin, a contact oxidization basin, a secondary settling basin, a disinfection basin and a clean water basin of the treatment device in sequence; domestic sewage and sewage from a cooked food workshop pass through a mechanical grid ditch b of the treatment device at a time after being gathered together and then enter the pre-adjustment basin so as to be gathered with the sewage from the slaughtering workship; the treatment device further comprises a sludge concentration basin, a sludge adjustment basin and a centrifugal dewatering machine b which are connected with one another in sequence; sludge from the oil isolation settling basin, the air floating basin, the UBF anaerobic basin, the middle settling basin and the secondary settling basin is gathered into the sludge concentration basin; a dross basin is connected between the air floating basin and the sludge adjustment basin; dross of the air floating basin enters the sludge adjustment basin through the dross basin. The device runs stably; treated water can meet a first-stage standard emission requirement.

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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