CN201850191U - A catering wastewater treatment device - Google Patents

Abstract

The utility model discloses a restaurant wastewater treatment device which belongs to the technical field of sewage biochemical treatment and sewage recycle utilizing, and consists of an air flotation tank, a biological aerated filter, a clean water pond, a backwash water reservoir and an aeration system. The restaurant wastewater treatment device is simple in structure, reasonable in design, convenient for operation and low in manufacturing cost and running cost, ensures the quality of effluent obtained by treating oily restaurant wastewater can meet the regeneration and reuse standard, and can realize the popularization and the application of the restaurant wastewater treatment and reuse technology.

Description

A catering wastewater treatment device

technical field

The utility model relates to the technical field of sewage biochemical treatment and sewage resource utilization, in particular to a catering waste water treatment device, which is suitable for on-site treatment of waste water in restaurants, restaurants, canteens and restaurants. the

Background technique

Catering wastewater refers to the untreated wastewater discharged by the catering industry. Its characteristic is that the wastewater contains a large number of colloidal particles and suspended solids, the main components of which are animal and vegetable oils, inorganic salts, surfactants and proteins. According to the statistics of relevant departments, the untreated wastewater discharged by the catering industry in my country is nearly 100 million tons every year, and there is a growing trend. The discharge of general catering wastewater accounts for about 3% of urban domestic sewage discharge, but the content of BOD ₅ and COD _Cr accounts for 1/3 of the total load. According to the detection of catering industry sewage pollution indicators in several major domestic cities The results show that: COD is 1-4mg/L, BOD is 300-400mg/L, SS is 300-400mg/L, and oil is above 150mg/L. It can be seen that catering wastewater is a high-concentration pollution source and the main source of water pollution around cities. one of the reasons. The waste water has a high concentration of organic matter and a low pretreatment rate. If it is discharged into the urban pipe network without treatment or if the treatment fails to meet the standard, it will put a lot of pressure on the urban sewage treatment plant. The problem is even more serious in areas where the pipeline network is not complete. Catering wastewater is directly discharged into nearby water bodies, which not only affects the environment, but also endangers people's physical and mental health.

Traditionally, there are physical and chemical methods, electrochemical methods and biological treatment methods for treating catering wastewater. Physical and chemical methods mainly include coarse granulation method, demulsification method, coagulation method and magnetic adsorption separation method, etc. The treatment effect fluctuates greatly with the change of water quality, the treatment efficiency is not high, and there are also potential chemical residues Due to security issues, it cannot be widely promoted. the

Although the electrochemical method is a relatively mature method, its power consumption is large. With the increase of the concentration of wastewater, the power consumption will also increase significantly, and it is also corrosive to instruments and equipment. the

The current biological methods mainly include activated sludge method, biofilm method, biological contact oxidation method and biodegradation method. As the most widely used sewage treatment technology, the activated sludge method has good treatment effect and is easy to operate, but it occupies a large area and produces a large amount of sludge. Moreover, because the catering wastewater contains a large amount of surfactant, the sludge bulks The situation is very prominent, and the cost is high, and there are certain restrictions on application. the

Contents of the invention

In view of the above problems, the utility model has developed a set of economical and effective catering wastewater treatment device - air flotation-biological aerated filter method catering wastewater treatment device, combined with the advantages of physical chemistry and biological methods, under the premise of ensuring the treatment effect , to overcome sludge bulking, reduce engineering investment and operating costs. the

The utility model is realized through the following technical solutions:

A catering wastewater treatment device consists of an air flotation tank, an aerated biological tank, a clear water tank, disinfection equipment and a blast aeration system. the

The air flotation pool is a vertical flow air flotation pool, which adopts a pressurized dissolved air flotation method. the

The biological aerated filter is a rectangular or circular container with filter material and aeration device installed inside. the

The blast aeration system includes a blower, an air pipeline and an aeration device. the

The air flotation tank, the biological aerated filter tank and the clear water tank can be arranged in an integrated manner without connecting pipes, which saves floor area and engineering investment. the

The air flotation tank, biological aerated filter tank, clean water tank, disinfection equipment and blast aeration system can be skid-mounted, further saving floor space and engineering investment. the

Suspended microorganisms and attached microorganisms exist in the biological aerated filter, the total amount of microorganisms per unit volume is large, the food chain is long, the strains are rich, and the impact load resistance is strong, which effectively overcomes the occurrence of sludge bulking. the

In the utility model, the sewage enters the air flotation tank through the water inlet pipe to remove a large amount of total phosphorus, suspended matter and oil in the sewage, and removes ammonia nitrogen and organic matter through the biological aerated filter, and then enters the clear water pool as a buffer and storage, and passes through the disinfection equipment After disinfection, the effluent can be directly reused for toilet flushing and greening of nearby sites. This process is simple to operate, occupies a small area, and is convenient for management. The utility model adopts the air flotation-aeration biological filter process, which can effectively remove suspended matter, overcome the problem of sludge expansion in ordinary activated sludge process, and has the advantages of biofilm process at the same time, reducing the output of excess sludge and making the system stable Operates and is easy to maintain. the

The utility model realizes the organic combination of air flotation and aerated biological filter process, and realizes the purposes of land saving, energy saving and emission reduction while improving the treatment efficiency. The utility model has the following advantages:

1. The reactor of the utility model is compact in structure, simple in structure, simple in operation and maintenance. the

2. The utility model adopts an integrated skid-mounted structure, which effectively saves the occupied area. the

3. There are biofilm and activated sludge in the biological aerated filter of the utility model, so the biomass can be greatly increased, and suitable living conditions can be provided for nitrifying bacteria, denitrifying bacteria and phosphorus removal bacteria, and then the phosphorus removal of sewage can be improved. Denitrification effect, reduce engineering investment and operating costs. the

4. The utility model does not need mixed liquid backflow and sludge backflow, which saves power consumption;

5. The microbial generation cycle in the biological aerated filter is long, and the amount of sludge produced is small, which saves the sludge treatment device, which is beneficial to energy saving and land saving. the

In short, a catering wastewater treatment device of the present utility model adopts an integrated skid-mounted design, adopts air flotation + aerated biological filter technology, and realizes resource recycling of catering wastewater, which can not only improve treatment efficiency, but also effectively save infrastructure It is a kind of sewage treatment system with high practical value. the

Description of drawings

Fig. 1 is the flow chart of a kind of catering wastewater treatment device of the present utility model;

Fig. 2 is the plane layout drawing of a kind of catering wastewater treatment device of the present utility model;

reference sign

1. Water inlet pipe 2. Dosing device 3. Air flotation pool

4. Dissolved air system 5. Biological aerated filter 6. Water collection system

7. Filling 8. Clean water pool 9. Disinfection equipment

10. Water outlet pipe 11. Backwash water pump 12. Gas pipeline

13. Aeration device 14. Blower 15. Backwash water storage tank

16. Lift pump 17. Equipment area

Detailed ways

The utility model is a catering wastewater treatment device. Referring to FIG. 1, the treatment device includes an air flotation tank 3, a biological aerated filter tank 5, a clear water tank 8, a backwash water storage tank 15 and aeration systems 12, 13, 14. The air flotation tank 3, the biological aerated filter tank 5, the clear water tank 8, and the backwash water storage tank 15 are connected in sequence, and can be made into an integrated skid-mounted device with the equipment area and the aeration system. the

The sewage enters the air flotation tank 3, the biological aerated filter tank 5, the clean water tank 8 and the disinfection equipment 9 successively after oil separation, and the effluent reaches the standard for reuse. During the treatment process, the blower 14 in the aeration system continuously supplies air to the biological aerated filter 5 through the air pipeline 12 and the aeration device 13 to ensure the activity of microorganisms inside it. the

After testing, the external drainage after being treated by a catering wastewater treatment device described in the utility model can stably meet the requirements of the national GB/T 18920-2002 Municipal Wastewater Recycling and Utilization of Urban Miscellaneous Water Quality. For the same processing object, the processing effect and efficiency of the utility model are slightly higher than that of the prior art, while the operating cost can be saved by 10%, and the engineering investment can be saved by about 15%. the

Claims (2)

1. A catering wastewater treatment device, comprising air flotation tank (3), biological aerated filter tank (5), clear water tank (8), disinfection equipment (9), backwash water storage tank (15) and aeration system ( 12, 13, 14), characterized in that: the air flotation tank, the biological aerated filter tank, and the clear water tank can be arranged in one piece without connecting pipes. 2. A kind of catering wastewater treatment device as claimed in claim 1, characterized in that: air flotation tank (3), biological aerated filter tank (5) and clear water tank (8), backwash water storage tank (15) pool The body is connected in turn, and can be made into an integrated skid-mounted device with the equipment area and aeration system. the

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