Energy-saving slaughter wastewater treatment method

Abstract

The invention discloses an energy-saving slaughter wastewater treatment method which comprises the following steps: (1) filtering slaughter wastewater by using a full-stainless steel structured mechanical grid with grid gaps of 3mm; (2) pumping the wastewater filtered through the mechanical grid into a hydraulic rotation screen through a water pump; (3) feeding the wastewater through the hydraulic rotation screen into a comprehensive oil separation sedimentation regulating basin; (4) feeding comprehensive tank effluent into an anaerobic ammonia oxidation reactor; (5) feeding anaerobic ammonia oxidation reactor effluent into a middle sedimentation basin, and backflowing sludge into the anaerobic ammonia oxidation reactor; (6) feeding middle sedimentation basin effluent into a composite vertical flow artificial wetland system; (7) feeding artificial wetland effluent into a disinfecting tank, and discharging after being disinfection by using chlorine dioxide. By adopting the method, the purposes of effectively eliminating pollutants such as organisms, ammonia nitrogen and SS (Suspended Solids) in the slaughter wastewater is achieved with low equipment investment and operation management expense, the effluent quality can meet the one-class discharge standards of the field, and a novel method is provided for energy-saving treatment on the slaughter wastewater.

Description

technical field [0001] The invention relates to an energy-saving treatment method for slaughter wastewater, which belongs to the technical field of food wastewater treatment. Background technique [0002] Wastewater from slaughtering and processing enterprises mainly includes washing wastewater from livestock pens to be slaughtered in breeding workshops, livestock shower wastewater from slaughtering workshops, high-temperature water from scalding pig pools, wastewater from cleaning white stripes, by-products from by-product workshops and wastewater from cleaning heads and hooves, and wastewater from division workshops. Wastewater from cleaning, cleaning equipment, and floor flushing; in addition, there are cooling water from the refrigeration room and domestic sewage discharged from toilets, bathrooms, canteens, etc. It contains a lot of polluting substances such as blood, fur, broken bones, grease, internal organs, undigested food, and feces. The wastewater generally does ...

AI Technical Summary

Problems solved by technology

These processes have a common feature, which is the need for aeration equipment, and the price of the aeration fan is relatively high, and the power is relatively large, and its energy consumption accounts for a considerable part of the wastewater treatment cost.

At the same time, the aeration equipment and pipelines need to be maintained frequently, otherwise the wastewater treatment effect may be affected due to insufficient aeration or uneven aeration

In addition, due to the high content of oil and SS in slaughter wastewater, coagulation sedimentation or air flotation processes that require a large amount of chemicals are generally used for pretreatment, which further increases the cost of wastewater treatment

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