CN201520701U - A kind of catering wastewater treatment equipment - Google Patents

Abstract

The utility model relates to restaurant wastewater treatment equipment which comprises a reaction tank, a biochemical flotation tank, an improved bacteria filter tank and a clean water tank. The restaurant wastewater treatment equipment provided by the utility model has the outstanding advantages of small occupied space, high efficiency, energy conservation, convenient control, efficient purification and the like; the exhaust water quality of treated restaurant wastewater can reach the discharge standard A of the first class in 'Discharge Standard of Pollutants for Municipal Wastewater Treatment Plant'; the exhaust water can be directly discharged or reused as non-drinking water; in addition, the equipment has the characteristics of small occupied area, high efficiency, low consumption, low investment cost, convenient operation and simple maintenance, and can not only be applied to the catering units with limited occupied space of large and medium-sized cities such as hotels, restaurants and the like, but also be applied to scenic spots and tourism-vacation areas far away from public supply mains.

Description

A kind of catering wastewater treatment equipment

technical field

The utility model relates to the field of environmental protection, in particular to a catering wastewater treatment equipment.

Background technique

In recent years, my country's catering industry has developed vigorously, and the proportion of the entire industry in the national economy has grown rapidly to an annual operating income of over 100 billion yuan. It has grown into an important force that cannot be ignored in my country's economic development. However, with the development of cities and urbanization, the scale and number of hotels, hotels, and canteens are increasing day by day, and the resulting amount of catering wastewater is increasing. According to incomplete statistics, the untreated waste water discharged by the catering industry in my country every year The amount of waste water reaches hundreds of millions of tons, and there is a growing trend. According to other reports, the discharge of catering wastewater accounts for about 3% of urban domestic sewage discharge, but the content of BOD ₅ and COD accounts for 1/3 of the total load. It can be seen that catering wastewater is a high-concentration pollution source, and it is the source of pollution in the surrounding water bodies. One of the main causes of pollution. Pollutants such as seasonings, detergents and proteins. This type of wastewater has the characteristics of high COD _cr and BOD ₅ values, large oil content, certain color and odor, and large changes in water quality and quantity. If these organic matters are discharged into rivers, lakes and seas without treatment, the water will be cloudy. , When the temperature is high, it will also deteriorate, making the water in rivers and lakes black, and giving off a foul smell, seriously affecting the environment. Bacteria in wastewater can become a source of disease transmission and pose a serious threat to people's physical and mental health. If the untreated oily wastewater from the catering industry is used for agricultural irrigation, it will block the soil voids and hinder the growth of crops. With the improvement of urban environmental management and stricter discharge standards, catering waste water must meet the water quality standards of sewage discharged into urban sewers before discharge, otherwise, it will face the danger of excessive fines and moving away from the city center. Therefore, it is of great practical significance to control and meet the discharge standards of catering wastewater.

Catering wastewater has complex components and high organic content, mainly food fiber, starch, fat, animal and vegetable oils, various condiments, detergents and proteins. This type of wastewater has the characteristics of high COD _cr and BOD ₅ values, high oil content, certain color and odor, and large changes in water quality and quantity. According to the test results of catering wastewater in developed areas such as Guangzhou and Shanghai in my country: BODs is 200-400mg/L, CODcr is 400-800mg/L, SS is 250-500mg/L, oil is 150-420mg/L, ammonia nitrogen is average The value is 6-50mg/L. The main task of catering wastewater treatment is to remove grease, organic matter, ammonia nitrogen and suspended solids.

In the prior art, simple oil separation devices or biochemical treatment devices are mostly used. Due to more or less problems in terms of economy, energy consumption, treatment effect, and land occupation, it is difficult to popularize and use them in the catering industry in urban areas.

Utility model content

The purpose of the utility model is to overcome the defects of the prior art and provide a kind of catering wastewater treatment equipment.

The utility model adopts the following technical means to solve the above-mentioned technical problems:

A catering wastewater treatment equipment is characterized in that it includes a reaction pool, an air flotation biochemical pool, an improved biological filter pool and a clear water pool connected in sequence.

Preferably, in the catering wastewater treatment equipment, the reaction pool is connected to the air flotation biochemical pool through an internal pipeline; the lower side of the air flotation biochemical pool is connected to the improved biofilter through an open-hole sump; the improved One side of the lower part of the biofilter is connected to one side of the clear water pool, and the other side of the clear water pool is provided with an outlet pipe.

Preferably, the reaction pool is also provided with a dosing pool, and a stirrer is provided on the top of the dosing pool.

Preferably, a slag scraper is provided on the top of the air flotation biochemical tank, and a dissolved air releaser and a suspended filler are provided inside.

More preferably, the air flotation biochemical tank is also equipped with a small pressure balance tank and a gas-liquid mixing pump.

Preferably, the catering wastewater treatment equipment is further provided with a grid tank and a grease trap connected in sequence between the water inlet pipe and the reaction tank.

More preferably, a grid is provided in the grid tank, and a separator is provided in the grease trap.

Preferably, a disinfection device and a backwash water pump are provided on the outside of the clear water pool.

When in use, the oily sewage from the catering industry enters the grille pool from the water inlet pipe, and the grille installed in the grille pool can intercept large particles of impurities; The separator can carry out mechanical oil separation of waste water; the dosing tank is used to prepare coagulant, and the effluent from the grease trap enters the reaction tank, and coagulant is added to the reaction tank for coagulation treatment; after coagulation treatment The effluent from the reaction tank enters the air flotation biochemical tank. In the air flotation biochemical tank, the sewage is subjected to solid-liquid separation treatment and the organic matter contained in the sewage is decomposed by the microorganisms fixed in the suspended filler, and then enters the improved biological filter through the perforated sump The biological filtration treatment is carried out in the pool, and after filtration, it enters the clear water pool, and is discharged from the outlet pipe after being sterilized and disinfected.

The catering wastewater treatment equipment of the utility model combines coagulation, air flotation, biochemical and improved biological filter processes to efficiently remove oil, organic matter, ammonia nitrogen and other pollutants in the catering wastewater, so that the effluent can meet the national discharge standard water quality. Compared with the prior art, the catering wastewater treatment equipment of the utility model has the following characteristics:

1. High removal efficiency, organic matter, grease, ammonia nitrogen and other pollution indicators in wastewater can be effectively removed. The treated water can be directly discharged or reused for domestic miscellaneous water. Small footprint, compact structure, and beautiful appearance can be widely used in urban areas with tight land occupation or scenic spots and tourist resorts with environmental requirements;

2. The equipment is simple, the floor area is small, the operation cost is low, and the operation management and maintenance are convenient.

The catering wastewater treatment equipment of the utility model has outstanding advantages such as small footprint, high efficiency and energy saving, convenient management, and high-efficiency purification. Standard, the effluent can be directly discharged or reused for domestic miscellaneous water. The equipment occupies a small area, high efficiency and low consumption, low investment cost, convenient operation and simple maintenance. Not only can it be used in catering units in large and medium-sized cities such as hotels and hotels that occupy a tight space. It can also be applied to scenic spots and tourist resorts far away from urban pipe networks. Using this integrated equipment for treatment can make the effluent water quality meet the national discharge standard or domestic miscellaneous water reuse standard. At the same time, according to the specific requirements of the surrounding landscape of the project, the integrated equipment can be buried or above-ground to coordinate with the surrounding natural landscape.

Description of drawings

Fig. 1 is a top view of the catering wastewater treatment equipment of the present invention.

Fig. 2 is a sectional view of plane A-A of the catering wastewater treatment equipment of the present invention.

Fig. 3 is a B-B section view of the catering wastewater treatment equipment of the present invention.

Detailed ways

In Fig. 1～3, the catering wastewater treatment equipment diagram of the present utility model, as shown in the figure, the catering wastewater treatment equipment of the present utility model comprises: dosing pool 1, reaction pool 2, air flotation biochemical pool 3, improved biological filter Pool 4, clear water pool 5, grease trap 6 and grille pool 10; wherein, grille pool 10 is provided with grille 13, one side of grille pool 10 is provided with water inlet pipe 7, and the other side is connected with oil trap The pool 6 is connected; the inside of the grease trap 6 is provided with a first baffle plate 8 and a second baffle plate 9 placed upright, and one side of the grease trap 6 is connected to the reaction pool 2 through a pipeline 24 .

The top of the dosing pool 1 is provided with a mixer 12; the reaction pool 2 is connected to the air flotation living pool 3 through internal pipes; It is connected with the improved biological filter 4; the lower side of the improved biological filter 4 is connected with one side of the clear water pool 5 through the perforated plate 15, and the other side of the clear water pool 5 is provided with an outlet pipe 16. Simultaneously, the outside of the clean water pool is provided with a disinfection device 22 and a backwash water pump 23 .

The top of the air flotation biochemical tank 3 is provided with a slag scraper 17, a dissolved air releaser 18 and a suspended filler 19 are provided inside, and a small force balance tank 20 and a gas-liquid mixing pump 21 are provided outside.

The improved biological filter 4 is provided with a biological filter material 25 .

During the treatment of catering oily wastewater, the catering oily wastewater enters the grid pool 10 from the water inlet pipe 7, the large particles of impurities in the wastewater are removed by the grid 13, and the effluent from the grid pool 10 enters the grease trap 6 , through the first baffle plate 8 and the second baffle plate 9 for mechanical oil separation.

The effluent discharged from the grease trap 6 enters the reaction tank 2, and then the coagulant prepared in the dosing tank 1 is added into the reaction tank 2 to carry out coagulation reaction.

After the coagulation reaction, the effluent enters the air flotation biochemical tank 3, and after the solid-liquid separation treatment of the sewage and the decomposition of the organic matter contained in the sewage by the microorganisms fixed in the suspended filler 19, it enters the improved biological Filtration is carried out in the filter tank 4. During this process, the negative pressure generated by the gas-liquid mixing pump 21 sucks the air in and mixes the return water with gas and water to form pressurized dissolved air water, which is then regulated by the small pressure balance tank 20 and delivered to the dissolved air releaser 18. The coagulated wastewater is fully mixed with the dissolved air water passing through the dissolved air releaser 18. After the flocs and microbubbles are attached, they rise to the surface of the water body to form scum, and the scum is scraped off by the scum scraper 17. Then, the effluent from the air flotation biochemical tank 3 enters the interior of the improved biological filter 4 through the perforated water collection tank 14 for biological filtration. The effluent water after biological filtration enters the clear water pool 5 through the perforated plate 15, and is directly discharged or reused from the outlet pipe 16 after being sterilized by the disinfection device 22.

Test results of effluent after purification treatment:

Table 1 Example 1 Purification treatment after the basic control items of water removal rate data table

project SS or oil removal rate COD removal rate BOD removal rate Chroma removal rate Catering oily wastewater 98% 95% 98% 70%

Table 2 Example 1 Purification treatment effluent basic control item discharge concentration (daily average value) Unit: mg/L

serial number Basic Control Items  Class A standard A standard Wastewater before purification (mg/L) Effluent after purification treatment (mg/L) 1 Chemical Oxygen Demand (COD) 50 400-800 ≤50 2 Biochemical Oxygen Demand (BOD ₅ ) 10 200-400 ≤10

serial number Basic Control Items  Class A standard A standard Wastewater before purification (mg/L) Effluent after purification treatment (mg/L) 3 Suspended solids (SS) 10 250-500 ≤10 4 animal and vegetable oil 1 150-420 ≤1 5 Anionic surfactants 0.5 3-5 ≤0.5 6 Total Nitrogen (as N) 15 40-60 ≤15 7 Ammonia nitrogen (as N) (5)8 6-50 ≤5 8 Total phosphorus (calculated as P) 0.5 3-6 ≤0.5 9 Chromaticity (dilution factor) 30 100-200 ≤30 10 pH 6-9 6-9 6-9 11 Number of fecal coliforms (unit/L) 10 ³ ≥10 ⁵ ≤10 ³

The above test results show that: after the purification treatment of the oily wastewater of catering in this embodiment, a large amount of organic matter, grease, and ammonia nitrogen, chroma, etc. of the wastewater are removed, so that the indicators of the effluent can meet the requirements for reuse of water. The effluent quality of catering oily wastewater can meet the first-class A discharge standard of the "Discharge Standards for Pollutants of Urban Sewage Treatment Plants", and the effluent can be directly discharged or reused for domestic miscellaneous water.

Claims (7)

1. A kind of catering waste water treatment equipment is characterized in that, comprises successively connected reaction tank, air flotation biochemical tank, improved biological filter tank and clear water tank. 2. The catering wastewater treatment equipment as claimed in claim 1, wherein, in the catering wastewater treatment equipment, the reaction pool is connected with the air flotation biochemical pool through an internal pipeline; the bottom of the air flotation biochemical pool is a One side is connected with the improved biofilter through an open-hole sump; one side of the lower part of the improved biofilter is connected with one side of the clear water pool, and the other side of the clear water pool is provided with an outlet pipe. 3. The catering wastewater treatment equipment as claimed in claim 1, characterized in that, the reaction pool is further provided with a dosing pool, and the top of the dosing pool is provided with a mixer. 4. The catering wastewater treatment equipment as claimed in claim 1, wherein a slag scraper is provided on the top of the air flotation biochemical tank, and a dissolved air releaser and a suspended filler are provided inside it. 5. The catering wastewater treatment equipment as claimed in claim 4, characterized in that a small pressure balance tank and a gas-liquid mixing pump are arranged outside the air flotation biochemical tank. 6. The catering wastewater treatment equipment as claimed in claim 1, characterized in that, said catering wastewater treatment equipment is also provided with a grid pool and a grease trap connected in sequence between the water inlet pipe and the reaction pool. 7. The catering wastewater treatment equipment as claimed in claim 6, wherein a grid is provided in the grid tank, and a partition is provided in the grease trap.

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