Preformed vegetable sewage treatment device

Abstract

The utility model discloses a sewage treatment device for prefabricated vegetables. The sewage treatment device comprises a pretreatment area, an air flotation area, a hydrolytic acidification area, a biochemical area, a settling area, a biological filtration area and a clear water area which are communicated in sequence, sewage sequentially passes through the pretreatment area, the air flotation area, the hydrolytic acidification area, the biochemical area, the settling area, the biological filtration area and the clear water area and then reaches the national discharge standard. Through the multi-stage treatment process integrating the air flotation area, the hydrolytic acidification area, the biochemical area, the settling area, the biological filtration area and the like, the removal efficiency of high-concentration organic matters, grease and suspended matters is remarkably improved, and the effluent is ensured to reach the national discharge standard; through the communication design of the sludge tank and the adjusting tank, the cyclic utilization of sludge and supernate is realized, the emission of pollutants is reduced, and the concept of sustainable development is met; and the backwashing washing water in the biological filtering area flows back to the adjusting tank, so that the wastewater discharge is reduced, and the maintenance cost is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of sewage treatment, in particular to a sewage treatment device for prefabricated dishes. Background Technique

[0002] With the rapid development of the prefabricated dish industry, the problem of wastewater treatment in the production process has become increasingly prominent. These wastewaters usually contain high concentrations of organic matter, oil, suspended solids and nitrogen, and improper treatment will cause serious pollution to the environment. At present, the sewage treatment technologies on the market mainly include oil-water separators, regulating ponds, sedimentation ponds and biological contact oxidation methods, etc. However, these technologies have the following limitations:

[0003] 1. Low treatment efficiency: The traditional oil-water separator and sedimentation pond have limited removal effects on high-concentration organic matter and oil, and it is difficult to meet the increasingly strict discharge standards.

[0004] 2. Long construction period: The construction period of traditional civil engineering sewage treatment facilities is long, and it is difficult to select a site, which is not conducive to quickly responding to market demands.

[0005] 3. Complicated operation: The operation and maintenance of existing technologies are relatively complicated and require professional personnel for management, increasing the operating cost.

[0006] 4. Great environmental impact: The civil engineering sewage treatment facilities have a great impact on the surrounding environment, which is not conducive to environmental protection and sustainable development. Content of the Utility Model

[0007] In view of the problems existing in the prior art, the utility model provides a sewage treatment device for prefabricated dishes.

[0008] In order to achieve the above purpose, the technical solution of the utility model is as follows:

[0009] The utility model provides a sewage treatment device for prefabricated dishes, including: a pretreatment area, a flotation area, a hydrolysis acidification area, a biochemical area, a sedimentation area, a biological filtration area, and a clear water area that are connected in sequence; the prefabricated dish sewage passes through the pretreatment area, the flotation area, the hydrolysis acidification area, the biochemical area, the sedimentation area, the biological filtration area, and the clear water area in sequence and then reaches the national discharge standard.

[0010] Preferably, the pretreatment area includes a grid channel, a grit chamber, and a regulating pond that are connected in sequence, and is used for preliminary treatment of the sewage.

[0011] Preferably, the biochemical area includes an anaerobic area, an anoxic area, and an aerobic area arranged in sequence.

[0012] Preferably, the sewage treatment device for prefabricated dishes further includes a sludge tank;

[0013] The sedimentation area is also respectively connected to the anaerobic area, the anoxic area, and the sludge tank,

[0014] The sludge in the sedimentation zone is returned to the anaerobic zone for re-treatment, or enters the sludge tank for treatment; the nitrified liquid in the sedimentation zone is returned to the anoxic zone.

[0015] Preferably, the sludge tank is also connected to the regulation tank for returning the supernatant liquid in the sludge tank to the regulation tank.

[0016] Preferably, the air flotation zone includes a lift pump for lifting the sewage adjusted by the regulation tank to the air flotation zone for treatment.

[0017] Preferably, an ultraviolet disinfection device is also provided in the clear water zone for disinfecting the clear water flowing into the clear water zone after being filtered by the biological filtration zone.

[0018] Preferably, the biological filtration zone is also connected to the regulation tank through a reflux pipe, and after the backwashing process in the biological filtration zone ends, the backwashed water is refluxed to the regulation tank through the reflux pipe.

[0019] Preferably, the grit chamber, the regulation tank, and the sludge tank are arranged side by side, and the grille channel is placed beside the grit chamber; the air flotation zone, the hydrolysis acidification zone, the anaerobic zone, the anoxic zone, and the aerobic zone are arranged side by side in sequence.

[0020] Adopting the technical solution of the present utility model has the following beneficial effects:

[0021] By integrating multi-stage treatment processes such as an air flotation zone, a hydrolysis acidification zone, a biochemical zone, a sedimentation zone, and a biological filtration zone, the present utility model significantly improves the removal efficiency of high-concentration organic matters, oils, and suspended solids, ensuring that the effluent meets the national discharge standards; through the connected design of the sludge tank and the regulation tank, the recycling of sludge and supernatant liquid is realized, reducing pollutant emissions and conforming to the concept of sustainable development; the backwashed water in the biological filtration zone is refluxed to the regulation tank, reducing wastewater discharge and lowering the maintenance cost.

[0022] After the sewage of the present utility model is collected by the plant area collection pipe network, it first enters the grid channel, and the larger floating substances in the sewage are removed through the grid. Then it flows into the grit chamber by itself to remove the sediment brought in during vegetable washing. After the grit pretreatment, the sewage enters the regulation tank to regulate the water quality and water volume of the sewage to ensure the stable operation of the subsequent treatment equipment. The sewage with regulated water volume and water quality enters the air flotation through the lift pump to remove most of the visible grease and fine suspended particles in the sewage, greatly reducing the pollutant index in the sewage. After the air flotation treatment, the sewage flows into the hydrolysis acidification tank by itself, converting the non-dissolved organic matter in the sewage into dissolved organic matter, especially converting the difficult-to-biodegrade organic matter into easily biodegradable organic matter, greatly improving the biodegradability of the sewage, which has a decisive effect on the removal efficiency of the subsequent treatment unit. After hydrolysis acidification, it successively passes through the anaerobic zone, anoxic zone, aerobic zone, and sedimentation zone, and suspended fillers are added in the aerobic zone for microorganisms to form biofilms and reproduce, improving the pollutant removal efficiency in the aerobic zone, and completely decomposing the easily degradable and small-molecule organic matter in the sewage. After biochemical treatment, the sewage is filtered through a biological filter to further reduce SS, and after passing through an ultraviolet disinfection device, it is discharged up to the standard. Brief Description of the Drawings

[0023] Figure 1 It is a schematic flow chart of the present utility model;

[0024] Figure 2 It is a schematic structural diagram of the present utility model. Detailed Embodiment

[0025] The embodiments of the present utility model will be described in detail below. The examples of the embodiments are shown in the drawings, where the same or similar reference numerals indicate the same or similar elements or elements with the same or similar functions throughout. The embodiments described below with reference to the drawings are exemplary and are intended to explain the present utility model and should not be construed as limiting the present utility model.

[0026] In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as limiting the present utility model.

[0027] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0028] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0029] In the present invention, unless otherwise expressly specified or limited, a first feature is “on” or “below” a second feature.

[0030] “Under” may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, the first feature being “above”, “above”, and “above” the second feature includes the first feature being directly above and obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature being “below”, “below”, and “below” the second feature includes the first feature being directly below and obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0031] Reference Figures 1 to 2 , a pre-prepared food wastewater treatment device, comprising: a pre-treatment area, an air flotation area, a hydrolysis acidification area, a biochemical area, a sedimentation area, a biological filtration area, and a clean water area which are connected in sequence; the pre-prepared food wastewater reaches the national discharge standard after passing through the pre-treatment area, the air flotation area, the hydrolysis acidification area, the biochemical area, the sedimentation area, the biological filtration area, and the clean water area in sequence;

[0032] Among them, the air flotation area includes an air flotation tank 400, where (PAC / PAM) flocculants and coagulants can be added to remove grease and fine suspended particles in the sewage; PAC is an efficient flocculant that can react with suspended particles and colloidal substances in water to form larger flocs, which are more easily removed through the air flotation process; PAM is a high molecular polymer with good flocculation and coagulation assistance. It can bridge and trap small flocs to form larger flocs, thereby improving the efficiency of air flotation; in the air flotation area, the addition of PAC and PAM helps remove grease and fine suspended particles in the sewage because these flocs can adhere to grease and suspended substances, making them easier to be captured by the air flotation equipment and separated from the water; by using PAC and PAM, the residence time required in the air flotation area can be reduced, the treatment speed can be accelerated, and the overall treatment efficiency can be improved;

[0033] Through the synergistic effect of flocculation and air flotation, the chemical oxygen demand (COD), suspended solids (SS), and grease content in the effluent can be significantly reduced, and the effluent quality can be improved.

[0034] The hydrolysis and acidification area includes a hydrolysis and acidification tank 500, which is used to convert refractory macromolecular organic matter into easily degradable small molecular organic matter; the sedimentation area includes a sedimentation tank 900, which is used to precipitate and remove suspended solids after treatment; the biological filtration area includes a biological filter 1100, which is used to further filter and purify the treated water; the clear water area includes a clear water tank 1200, which is used to store the treated clear water.

[0035] Furthermore, the pretreatment area includes a grid channel 100, a grit chamber 150, and an adjustment tank 200 that are connected in sequence, which are used for the preliminary treatment of sewage. Among them, the grid channel 100 is used to remove large particulate matter, the grit chamber 150 is used to remove heavier inorganic particles such as sand and gravel, and the adjustment tank 200 is used to adjust the water quality and quantity of sewage to ensure the stable operation of subsequent treatment equipment.

[0036] Furthermore, the biochemical area includes an anaerobic area, an anoxic area, and an aerobic area arranged in sequence; among them, the anaerobic area includes an anaerobic tank 600, which is used for anaerobic digestion to further treat organic matter; the anoxic area includes an anoxic tank 700, which is used for denitrification to remove nitrogen in the sewage; the aerobic area includes an aerobic tank 800, which is used to further degrade organic matter in the sewage.

[0037] Furthermore, the prefabricated vegetable sewage treatment device also includes a sludge tank 300; among them, the sludge tank 300 is used to collect and store the sludge generated during the treatment process; the sedimentation area is also respectively connected to the anaerobic area, the anoxic area, and the sludge tank. The sludge in the sedimentation area is refluxed to the anaerobic area for re-treatment through a reflux pipeline, or enters the sludge tank for treatment; the nitrification liquid in the sedimentation area is refluxed to the anoxic area through a reflux pipeline to promote denitrification.

[0038] Furthermore, the sludge tank 300 is also connected to the regulation tank 200, which is used to return the supernatant in the sludge tank to the regulation tank 200 and re-enter the treatment process. The sludge in the sludge tank 300 is transported and processed externally, achieving the effective management and reuse of sludge and supernatant, and reducing pollutant emissions.

[0039] Furthermore, the air flotation area includes a lift pump, which is used to lift the sewage adjusted by the regulation tank to the air flotation area for treatment. The flow rate and lift of the lift pump can be set according to the treatment requirements, ensuring that the sewage can efficiently enter the air flotation area for the removal of grease and suspended solids.

[0040] Furthermore, an ultraviolet disinfection device is also provided in the clear water area, which is used to disinfect the clear water flowing into the clear water area after being filtered by the biological filtration area, ensuring that the effluent quality meets the health standards.

[0041] Furthermore, the biological filtration area is also connected to the regulation tank through a reflux pipe. After the backwashing process of the biological filtration area is completed, the backwashed water flows back to the regulation tank through the reflux pipe, enabling the pollutants in the backwashed water to re-enter the treatment process, achieving the recycling of water resources and reducing pollutant emissions.

[0042] Furthermore, the grit chamber 150, the regulation tank 200, and the sludge tank 300 are arranged side by side for easy preliminary treatment. The grille channel 100 is placed beside the grit chamber 150; the air flotation area, the hydrolysis acidification area, the anaerobic area, the anoxic area, and the aerobic area are arranged side by side in sequence.

[0043] The working principle of the present utility model is as follows:

[0044] Before the formal treatment of the wastewater from prefabricated food production, necessary pretreatment must be carried out. After the sewage is collected by the plant collection pipe network, it first enters the grille channel 100, and the larger floating substances in the sewage are removed through the grille channel 100. Then it flows into the grit chamber 150 by gravity to remove the sediment brought in during vegetable washing. After the grit pretreatment, the sewage enters the regulation tank 200 to regulate the water quality and quantity of the sewage to ensure the stable operation of the subsequent treatment equipment. The sewage with regulated water volume and quality enters the air flotation tank 400 through a lift pump to remove most of the visible grease and fine suspended particles in the sewage, greatly reducing the pollutant index in the sewage. After air flotation treatment, the sewage flows into the hydrolysis acidification tank 500 by gravity, converting the non-dissolved organic matter in the sewage into dissolved organic matter, especially converting the difficult-to-biodegrade organic matter into easily biodegradable organic matter, greatly improving the biodegradability of the sewage, which plays a decisive role in the removal efficiency of the subsequent treatment unit. After hydrolysis acidification, the sewage flows into the A2 / O + MBBR biochemical area, passing through the anaerobic area, anoxic area, aerobic area, and sedimentation area in sequence. Suspended fillers are added in the aerobic area for microorganisms to attach membranes and reproduce, improving the pollutant removal efficiency in the aerobic area and completely decomposing the easily degradable and small-molecule organic matter in the sewage. After biochemical treatment, the sewage is filtered through a biological filter to further reduce the SS, and then discharged up to standard after passing through an ultraviolet disinfection device.

[0045] The above are only the preferred embodiments of the present invention, and do not limit the patent scope of the present invention accordingly. Any equivalent structural transformation made under the inventive concept of the present invention by using the content of the specification and drawings of the present invention, or any direct / indirect application in other related technical fields is included in the patent protection scope of the present invention.

Claims

1. A sewage treatment device for prefabricated dishes, characterized in that, Comprising: A pre-treatment area, a flotation area, a hydrolysis acidification area, a biochemical area, a sedimentation area, a biological filtration area, and a clear water area that are connected in sequence; the sewage passes through the pre-treatment area, the flotation area, the hydrolysis acidification area, the biochemical area, the sedimentation area, the biological filtration area, and the clear water area in sequence and then reaches the national discharge standard.

2. The sewage treatment device for prefabricated dishes according to claim 1, characterized in that, The pre-treatment area includes a grille channel, a grit chamber, and an equalization tank that are connected in sequence, and is used for the preliminary treatment of sewage.

3. According to claim 2, characterized in that, The biochemical area includes an anaerobic area, an anoxic area, and an aerobic area that are arranged in sequence.

4. The sewage treatment device for prefabricated dishes according to claim 3, characterized in that, The prefabricated vegetable sewage treatment device further includes a sludge tank; The sedimentation area is also respectively connected to the anaerobic area, the anoxic area, and the sludge tank, so that the sludge in the sedimentation area is refluxed to the anaerobic area for re-treatment, or enters the sludge tank for treatment; the nitrification liquid in the sedimentation area is refluxed to the anoxic area.

5. The sewage treatment device for prefabricated dishes according to claim 4, wherein, The sludge tank is also connected to the equalization tank, and is used for refluxing the supernatant in the sludge tank to the equalization tank.

6. The prefabricated vegetable sewage treatment device according to claim 5, wherein, The flotation area includes a lift pump, which is used to lift the sewage adjusted by the equalization tank to the flotation area for treatment.

7. The sewage treatment device for prefabricated dishes according to claim 6, characterized in that, An ultraviolet disinfection device is also provided in the clear water area, which is used to disinfect the clear water flowing into the clear water area after being filtered by the biological filtration area.

8. The sewage treatment device for prefabricated dishes according to claim 7, characterized in that, The biological filtration area is also connected to the equalization tank through a reflux pipe. After the backwashing process of the biological filtration area ends, the backwash water is refluxed to the equalization tank through the reflux pipe.

9. The sewage treatment device for prefabricated dishes according to claim 8, characterized in that The grit chamber, the equalization tank, and the sludge tank are arranged side by side, and the grille channel is placed beside the grit chamber; the flotation area, the hydrolysis acidification area, the anaerobic area, the anoxic area, and the aerobic area are arranged side by side in sequence.

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