A kitchen wastewater treatment device

Abstract

The utility model relates to the technical field of wastewater treatment especially is kitchen wastewater treatment device, it includes the grate pool for filtering, the oil separation sedimentation tank for separating oil residue, the regulating pool for adjusting water volume, the air floatation pool for removing suspended particles, the anoxic tank for treating pollutants, the first UASB reaction pool and second UASB reaction pool for treating pollutants, the AOAO treatment pool for treating pollutants, the mbr component for separating sludge and water, the advanced oxidation tank for treating pollutants, the nf component for intercepting big molecular organic matter and part of salt of non-biochemical treatment. The utility model has the effect that can efficiently treat kitchen wastewater.

Description

Technical Field

[0001] This utility model relates to the technical field of wastewater treatment, and in particular to a kitchen wastewater treatment device. Background Technology

[0002] With the booming development of the catering industry and the continuous improvement of residents' living standards, the discharge of kitchen wastewater has shown a year-on-year increasing trend. As a typical high-concentration organic wastewater, kitchen wastewater has an extremely complex composition. It contains large amounts of pollutants such as animal and vegetable oils, starch, fruit and vegetable juices, and beverages. This wastewater is rich in organic matter such as animal and vegetable oils, proteins, and amino acids. If discharged directly into water bodies without treatment, the organic matter will be rapidly oxidized, consuming large amounts of dissolved oxygen and causing severe oxygen deficiency. Simultaneously, the presence of insoluble substances such as oils severely reduces the reoxygenation capacity of the water surface, affecting the survival of fish and other aquatic animals. Furthermore, suspended solids in the wastewater easily decompose under anaerobic conditions, producing odors and deteriorating the regional environment. Therefore, a treatment device capable of efficiently treating kitchen wastewater is needed. Utility Model Content

[0003] In order to efficiently treat kitchen wastewater, this utility model provides a kitchen wastewater treatment device to address the problems of the prior art.

[0004] This utility model provides a kitchen wastewater treatment device, which adopts the following technical solution:

[0005] A kitchen wastewater treatment device includes, in sequence, a bar screen for filtration, an oil-water separator for separating oil residue, an equalization tank for regulating water volume, an air flotation tank for removing suspended particles, an anoxic tank for treating pollutants, a primary UASB reactor and a secondary UASB reactor for treating pollutants, an AOAO treatment tank for treating pollutants, an MBR component for separating sludge and water, an advanced oxidation tank for treating pollutants, and an NF component for intercepting non-biochemically treatable macromolecular organic matter and some salts.

[0006] Preferably, it also includes a sludge thickening tank for thickening sludge, wherein the oil-water separator, flotation tank, and MBR assembly are connected to the sludge thickening tank, and the sludge from the oil-water separator, flotation tank, and MBR assembly flows into the sludge thickening tank.

[0007] Preferably, the sludge thickening tank is connected to a filter press, and the sludge in the sludge thickening tank flows into the filter press after thickening.

[0008] Preferably, the concentrated wastewater generated by the NF component is returned to the oil-water separation sedimentation tank.

[0009] Preferably, the grid pool is provided with a grid, and the inner wall of the grid pool is surrounded by a raised edge, with the edge of the grid fitting onto the raised edge.

[0010] Preferably, the grid is funnel-shaped, with the end of the grid near the bottom of the grid pool having a smaller opening.

[0011] Preferably, a column is vertically installed at the bottom of the grid pool, and the small opening end of the grid abuts against the column.

[0012] In summary, this utility model includes at least one of the following beneficial technical effects of a kitchen wastewater treatment device:

[0013] The bar screen filters large-diameter suspended solids from the kitchen wastewater, the oil-water separator separates oil residue from the wastewater, the dissolved air flotation tank separates solids and liquids, the anoxic tank performs denitrification, the primary and secondary UASB reactors decompose organic matter into carbon dioxide and water, the wastewater undergoes further treatment in the AOAO treatment tank, the MBR module separates sludge from water, the advanced oxidation tank further degrades organic matter, and the NF module filters out non-biochemically treatable organic matter and salts. The filtered wastewater meets the standards and can be discharged. The entire treatment process achieves efficient treatment of kitchen wastewater and can more thoroughly remove various organic matter and salts, resulting in higher quality wastewater. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0015] Figure 2 This is a schematic diagram of the structure of the bar grid in this utility model.

[0016] In the diagram: 1. Bar screen; 13. Bar screen; 14. Column; 15. Flanged edge; 2. Oil-water separator sedimentation tank; 3. Equalization tank; 4. Dissolved air flotation tank; 5. Anoxic tank; 6. UASB reactor; 7. AOAO treatment tank; 8. MBR module; 9. Advanced oxidation tank; 10. Buffer tank; 11. NF module; 12. Sludge thickening tank; Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0018] In the description of this application, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this application is in use. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this application. In addition, the terms "first," "second," and "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0019] This utility model discloses a kitchen wastewater treatment device, such as... Figure 1-2 As shown, the system includes a screen 13 pool 1, within which a screen 13 is installed. A raised edge 15 is integrally formed around the inner wall of the screen 13 pool 1, with the edge of the screen 13 fitting against the upper surface of the raised edge 15. The screen 13 pool 1 has an inlet and an outlet, with the inlet located above the screen 13 and the outlet located below it. This design allows the screen 13 to block large-diameter suspended solids in the wastewater after it enters the screen 13 pool 1 through the inlet. Furthermore, the screen 13 is funnel-shaped, with a smaller opening at the end near the bottom of the screen 13. This allows the filtered large-diameter suspended solids to concentrate at the smaller opening, facilitating removal and cleaning by maintenance personnel. Additionally, a vertical column 14 is integrally formed at the bottom of the screen 13 pool 1, with the smaller opening of the screen 13 abutting against the column 14, providing support for the screen 13.

[0020] In addition, it also includes an oil-water separation sedimentation tank 2, which is connected to the outlet of the screen tank 13. Wastewater from the screen tank 13 is pumped into the oil-water separation sedimentation tank 2. The oil-water separation sedimentation tank 2 is equipped with an oil-water separation chamber, a sludge separation chamber, and a separation chamber. The bottom of the oil-water separation chamber is connected to the bottom of the sludge separation chamber. After the sewage flows into the oil-water separation chamber and the sludge separation chamber, grease and other substances float on the upper part of the oil-water separation chamber, while sludge settles at the bottom of the oil-water separation chamber and the sludge separation chamber. Then the sewage overflows from the top of the sludge separation chamber into the separation chamber, while the sludge remains at the bottom of the sludge separation chamber. The upper layer of sewage flows into the separation chamber and enters the next process, thus realizing the separation of oil and sludge.

[0021] In addition, it includes an equalization tank 3, which is connected to an oil-water separator and sedimentation tank 2. Wastewater from the oil-water separator and sedimentation tank 2 is pumped into the equalization tank 3, which buffers the flow rate of wastewater. It also includes a dissolved air flotation (DAF) tank 4, which is connected to the equalization tank 3. Wastewater from the equalization tank 3 is pumped into the DAF tank 4. The DAF tank 4 is connected to a dissolved air tank containing dissolved air water. The dissolved air water is pumped from the dissolved air tank into the DAF tank 4, where bubbles are generated that adsorb and float fine particles in the wastewater, thus achieving solid-liquid separation. The DAF tank 4 is also equipped with a dosing pump, which adds chemicals such as PAC and PAM to the DAF tank 4.

[0022] Additionally, it includes an anoxic tank 5, which is connected to a dissolved air flotation (DAF) tank 4. Wastewater from DAF tank 4 is pumped into DAF tank 4, where it undergoes denitrification. Through the metabolic action of denitrifying bacteria, nitrate nitrogen is converted into nitrogen gas, achieving denitrification. Simultaneously, some organic matter is degraded, improving the biodegradability of the wastewater. Furthermore, an anoxic tank 5 is equipped with a mixer. The mixer agitates the wastewater within the anoxic tank 5, thus enabling more efficient wastewater treatment.

[0023] In addition, it includes a primary UASB reactor 6 and a secondary UASB reactor 6. The primary UASB reactor 6 is connected to the anoxic tank 5, and the secondary UASB reactor 6 is connected to the primary UASB reactor 6. UASB, also known as upflow anaerobic sludge blanket, allows wastewater to undergo anaerobic reactions in the primary and secondary UASB reactors 6, thereby decomposing biodegradable organic matter in the wastewater into carbon dioxide and water, etc.

[0024] In addition, it also includes an AOAO treatment tank 7, which is connected to a secondary UASB reactor 6. Wastewater from the secondary UASB reactor 6 is pumped into the AOAO treatment tank 7. AOAO is also known as the anaerobic-anoxic-aerobic process. Wastewater undergoes anaerobic-anoxic-aerobic treatment in the AOAO treatment tank 7, thereby further degrading pollutants in the wastewater and thus treating the wastewater more thoroughly.

[0025] Additionally, the system includes an MBR module 8, which comprises an MBR membrane connected to the AOAO treatment tank 7. Wastewater from the AOAO treatment tank 7 is pumped into the MBR membrane, where it separates the mud and water from the wastewater. Furthermore, it includes an advanced oxidation tank 9, connected to the MBR membrane. Wastewater from the MBR membrane is pumped into the advanced oxidation tank 9, where oxidants such as Fenton's reagent are added to further degrade the organic matter. Additionally, it includes an NF module 11, which includes a nanofiltration membrane. Wastewater from the advanced oxidation tank 9 is pumped into the NF module 11, where the nanofiltration membrane filters out large organic molecules and some salts that cannot be biochemically treated. The filtered wastewater meets the discharge standards. A buffer tank 10 is installed between the advanced oxidation tank 9 and the NF module 11 to buffer the water flow.

[0026] In addition, it also includes a sludge thickening tank 12 for thickening sludge, an oil-water separator sedimentation tank 2, an air flotation tank 4, and an MBR component 8 connected to the sludge thickening tank 12. The sludge from the oil-water separator sedimentation tank 2, the air flotation tank 4, and the MBR component 8 is pumped into the sludge thickening tank 12. The sludge thickening tank 12 is connected to a filter press. After the sludge in the sludge thickening tank 12 is thickened, it is pumped into the filter press. The filter press filters out the water in the sludge to obtain a sludge cake, which is then transported off-site for treatment. At the same time, the concentrated wastewater generated by the NF component 11 is returned to the oil-water separator sedimentation tank 2 for treatment.

[0027] The implementation principle of the kitchen wastewater treatment device of this utility model is as follows: Kitchen wastewater flows into the screen tank 13, which blocks large-diameter suspended solids in the wastewater. The filtered wastewater is then pumped into the oil-water separation sedimentation tank 2, where oil and sludge are separated. The wastewater is then pumped into the equalization tank 3, and subsequently into the dissolved air flotation tank 4. The numerous air bubbles in the dissolved air flotation tank 4 adsorb and float the fine particles in the wastewater, thus achieving solid-liquid separation. The wastewater is then pumped into the anoxic tank 5 for denitrification. Finally, the wastewater is sequentially pumped into the primary UASB reactor 6 and the secondary UASB reactor 6. The organic matter in the wastewater... The wastewater is decomposed into carbon dioxide and water, and then pumped into the AOAO treatment tank 7 for further treatment to more thoroughly remove the organic matter. Next, the wastewater is pumped into the MBR component 8 for sludge-water separation, then into the advanced oxidation tank 9 where oxidants are added to further degrade the organic matter. Finally, the wastewater is pumped into the NF component 11 to filter out non-biochemically treatable organic matter and salts. Once the filtered wastewater meets the standards, it can be discharged. The entire treatment process achieves highly efficient treatment of kitchen wastewater, and can more thoroughly remove various organic matter and salts from it, resulting in higher-quality wastewater.

[0028] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Although the present utility model has been disclosed above with reference to a preferred embodiment, it is not intended to limit the present utility model. Any person skilled in the art can make some changes or modifications to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present utility model. Any simple modifications, equivalent changes, and modifications made to the above embodiments based on the present utility model without departing from the scope of the present utility model shall fall within the scope of the present utility model.

Claims

1. A kitchen wastewater treatment device, characterized in that: It includes, in sequence, a bar screen for filtration, an oil-water separator for separating oil sludge, an equalization tank for regulating water volume, an air flotation tank for removing suspended particles, an anoxic tank for treating pollutants, a primary UASB reactor and a secondary UASB reactor for treating pollutants, an AOAO treatment tank for treating pollutants, an MBR module for separating sludge and water, an advanced oxidation tank for treating pollutants, and an NF module for intercepting large molecular organic matter and some salts that cannot be biochemically treated.

2. The kitchen wastewater treatment device according to claim 1, characterized in that: It also includes a sludge thickening tank for thickening sludge, wherein the oil-water separation sedimentation tank, the flotation tank, and the MBR component are connected to the sludge thickening tank, and the sludge from the oil-water separation sedimentation tank, the flotation tank, and the MBR component flows into the sludge thickening tank.

3. The kitchen wastewater treatment device according to claim 2, characterized in that: The sludge thickening tank is connected to a filter press, and the sludge in the sludge thickening tank flows into the filter press after being thickened.

4. The kitchen wastewater treatment device according to claim 1, characterized in that: The concentrated wastewater generated by the NF component is returned to the oil-water separator and sedimentation tank.

5. The kitchen wastewater treatment device according to claim 1, characterized in that: The grid pool is provided with a grid, and the inner wall of the grid pool is surrounded by a raised edge, with the edge of the grid fitting onto the raised edge.

6. The kitchen wastewater treatment device according to claim 1, characterized in that: The grid is arranged in a funnel shape, with the end of the grid near the bottom of the grid pool having a smaller opening.

7. The kitchen wastewater treatment device according to claim 1, characterized in that: A column is vertically installed at the bottom of the grating pool, and the small opening end of the grating abuts against the column.

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