Process for treating slaughtering wastewater by using UCT

Abstract

The invention discloses a process for treating slaughtering wastewater by using UCT. The process comprises pretreatment, air floatation treatment, hydrolysis acidification treatment, UCT treatment, precipitation treatment and disinfection treatment. According to the process, slaughtering wastewater is pretreated, the pretreated slaughtering wastewater enters an air floatation pool through a lifting pump, and oil removing and residue removing are performed; in a hydrolysis acidification pool, the organic macromolecules in the wastewater are degraded into organic small molecules, and the nitro state nitrogen or nitroso state nitrogen is converted into nitrogen gas through a denitrification effect; the wastewater being subjected to hydrolysis acidification enters a UCT pool, aerobic bacteria are added under an aerobic condition, and the small molecule organic matters are oxidized into carbon dioxide and water while the ammonia nitrogen in the water is converted into nitrate nitrogen and nitrite nitrogen through a nitrification effect; and the wastewater treated by the UCT pool is subjected to sedimentation treatment and disinfection treatment, and the obtained treated wastewater meets the discharging standard. According to the present invention, the process has advantages of simple process, easy operation, easy maintenance, low comprehensive energy consumption, high efficiency, energy saving, and low running cost.

Description

technical field [0001] The invention relates to a slaughter wastewater treatment method, which belongs to the technical field of environmental protection wastewater treatment. Background technique [0002] Slaughter wastewater mainly comes from livestock, poultry, and fish slaughtering and processing, and is one of the largest sources of organic pollution in my country. Slaughter wastewater is generally reddish-brown in color and has an unpleasant stench. It contains a large amount of blood, grease, dander, bone chips, viscera, feces and other dirt, and has a high content of suspended solids. At present, most small-scale slaughterhouses only discharge directly after being treated in septic tanks, which brings serious pollution to water bodies. [0003] At present, the treatment method of slaughter wastewater mainly adopts ① UASB-coagulation sedimentation method (Guo Yongfu et al. Anaerobic UASB-coagulation sedimentation method to treat high-concentration slaughter wastewate...

AI Technical Summary

Problems solved by technology

At present, most small-scale slaughterhouses are only discharged directly after treatment in septic tanks, causing serious pollution to water bodies

[0003] At present, the treatment method of slaughter wastewater mainly adopts ① UASB-coagulation sedimentation method (Guo Yongfu et al. Anaerobic UASB-coagulation sedimentation method to treat high-concentration slaughter wastewater): mechanical grids are used to remove most of the solid pollutants and then aeration, Processes such as air flotation tank and SBR tower are used to treat slaughter wastewater. This process is cumbersome to operate, has poor denitrification effect and high treatment cost.

② Anaerobic method: anaerobic baffle reactor-aerobic tank-intermittent aeration tank. Although this process is simple, it has poor wastewater treatment effect and unstable operation

[0004] At present, although there are many methods for the treatment of slaughter wastewater, none of them is ideal, or the quality of the effluent water cannot meet the discharge requirements, or the cost is too high to be applied

Slaughter wastewater is wastewater with a high concentration of organic matter and ammonia nitrogen. The anaerobic or aerobic process alone is not suitable for slaughter wastewater. The effluent of the anaerobic process alone cannot meet the discharge requirements, and the aerobic process alone cannot Under such high-concentration and high-load wastewater, a series of problems such as sludge bulking will inevitably occur, and the operating cost is high

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