CN217757206U

CN217757206U - Kitchen waste sewage discharge treatment system

Info

Publication number: CN217757206U
Application number: CN202222158879.5U
Authority: CN
Inventors: 车向前; 林娜; 樊星; 于海舒
Original assignee: Lukong Jinrui Environmental Technology Suzhou Co ltd
Current assignee: Lukong Jinrui Environmental Technology Suzhou Co ltd
Priority date: 2022-08-17
Filing date: 2022-08-17
Publication date: 2022-11-08
Anticipated expiration: 2032-08-17

Abstract

The utility model relates to a kitchen garbage sewage discharge treatment system, including equalizing basin, solid-liquid separation railway carriage or compartment, air supporting railway carriage or compartment and the multistage AO pond of high concentration, still include MBR storehouse, fenton oxidation storehouse, blow off tower and biological filter. The utility model discloses increase MBR storehouse, fenton oxidation storehouse, blow off the structure of tower and biological filter on original basis, carry out further processing to the sewage after high concentration multistage AO pond is handled, cyclic treatment improves the treatment effect of sewage.

Description

Kitchen waste sewage discharge treatment system

Technical Field

The utility model relates to a kitchen garbage sewage treatment correlation technique field especially relates to a kitchen garbage sewage discharge treatment system.

Background

The kitchen waste refers to food residues, waste grease, overdue food and the like generated in the processes of food processing, diet service and dining in units such as hotels, dining halls of enterprises and public institutions, dining halls of schools and the like. The kitchen waste contains a large amount of pathogens of zoonosis infectious diseases, which not only easily causes cross infection of animals, but also easily causes diseases caused by infection of human bodies with viruses such as foot-and-mouth disease, hepatitis and the like. The sewage in the kitchen waste is a pollutant which accounts for a relatively heavy proportion in the kitchen waste. The catering sewage is complex in components and high in organic matter content, if the organic matter is discharged without being treated, the water body is turbid, the organic matter can go bad at high temperature, the water in rivers and lakes turns black, foul smell is generated, the environment is seriously affected, and bacteria in the sewage can become a disease transmission source, so that the physical and mental health of people is seriously threatened. The sewage treatment mode in the prior art is generally a process flow which takes the combination of an adjusting tank, a solid-liquid separation chamber, an air flotation chamber and a high-concentration multi-stage AO pool as a main body, for example, the application number is 201520515450.4, and the patent name is a comparison document 1 of a kitchen sewage treatment device, and qualified waste water which is not treated can be discharged when the high-concentration multi-stage AO can not reach the standard.

In view of the above-mentioned defects, the present designer is actively making research and innovation to create a kitchen waste sewage disposal system, so that it has industrial value.

SUMMERY OF THE UTILITY MODEL

In order to solve the technical problem, the utility model aims at providing a kitchen garbage sewage discharge treatment system.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

a kitchen waste sewage discharge treatment system comprises an adjusting tank, a solid-liquid separation chamber, an air flotation chamber and a high-concentration multi-stage AO pool, and further comprises an MBR chamber, a Fenton oxidation chamber, a blow-off tower and a biological filter, wherein sewage percolate is discharged into the adjusting tank through a water pump and is subjected to aeration stirring homogenization and uniform treatment through an air aeration pipe, high-concentration sludge in the adjusting tank enters the solid-liquid separation chamber through a sludge discharge pump, the high-concentration sludge entering the solid-liquid separation chamber is dewatered through the action of a mechanical dewatering machine and is conveyed into the sludge chamber, sewage subjected to mechanical dewatering in the solid-liquid separation chamber enters the air flotation chamber below the air flotation chamber, air flotation effluent passing through the air flotation chamber automatically flows into the high-concentration multi-stage AO pool through gravity to remove soluble organic pollutants in the sewage, sewage treated by the high-concentration multi-stage AO enters the water pump into the air flotation chamber, permeate liquid treated by the MBR chamber is discharged into the Fenton oxidation chamber through the water pump to be subjected to strong oxidation treatment, the Fenton oxidation effluent enters the biological filter through the gravity, and is further blown off ammonia nitrogen in the biological filter along with the AO in the blow-off biological filter.

As a further improvement, the upper layer floating slag after the air floatation tank of the air floatation box is treated, the residual sludge after the high-concentration multi-stage AO tank treatment and the denitrification sludge after the biological filter treatment are respectively conveyed to the regulating tank through the sludge pump.

As a further improvement of the utility model, the absorption liquid of the stripping tower after being treated by the stripping tower flows back to the high-concentration multi-stage AO pool through a water pump.

As a further improvement of the utility model, the device also comprises a first dosing tank, a second dosing tank and a third dosing tank, wherein the first dosing tank is respectively connected with the solid-liquid separation chamber and the air flotation chamber, and comprises a PAM metering pump, a PAM dissolving tank, a PAC metering pump and a PAC dissolving tank; the second dosing tank is connected with the Fenton oxidation bin and comprises a sulfuric acid metering pump, a sulfuric acid dissolving tank, a ferrous sulfate metering pump, a ferrous sulfate dissolving tank, a hydrogen peroxide metering pump, a hydrogen peroxide dissolving tank, an alkali liquor metering pump and an alkali liquor dissolving tank; the third dosing tank is connected with the biological filter tank and comprises a sodium acetate metering pump and a sodium acetate dissolving tank.

As a further improvement of the utility model, the oxygen supply device also comprises a first oxygen supply compartment and a second oxygen supply compartment, wherein the first oxygen supply compartment is used for supplying air to the regulating tank, the second oxygen supply compartment is used for supplying air to the high-concentration multi-stage AO tank, and the first oxygen supply compartment and the second oxygen supply compartment are both Roots blowers.

As a further improvement of the utility model, the high-concentration multi-stage AO pool comprises a plurality of nitrification pools and a plurality of denitrification pools.

As a further improvement of the utility model, the biological filter comprises a plurality of nitrification filter and a plurality of denitrification filter.

Borrow by above-mentioned scheme, the utility model discloses at least, have following advantage:

the utility model discloses increase MBR storehouse, fenton oxidation storehouse, blow off the structure of tower and biological filter on original basis, carry out further processing to the sewage after high concentration multistage AO pond is handled, cyclic treatment improves the treatment effect of sewage.

The above description is only an overview of the technical solution of the present invention, and in order to make the technical means of the present invention clearer and can be implemented according to the content of the description, the following detailed description is made with reference to the preferred embodiments of the present invention and accompanying drawings.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

Fig. 1 is a schematic structural diagram of the kitchen waste sewage discharge treatment system of the utility model.

In the drawings, the meanings of the reference numerals are as follows.

1 regulating pool 2 first oxygen supply compartment

3 solid-liquid separation chamber 4 first dosing tank

5 sludge bin 6 air supporting carriage

7 high concentration multistage AO pond 8 second oxygen suppliment railway carriage or compartment

9MBR storehouse 10 fenton oxidation storehouses

11 second dosing tank 12 stripping tower

13 biological filter 14 third dosing tank

Detailed Description

The following detailed description of the embodiments of the present invention is provided with reference to the accompanying drawings and examples. The following examples are intended to illustrate the invention, but are not intended to limit the scope of the invention.

In order to make the technical solution of the present invention better understood, the technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. The components of embodiments of the present invention, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations. Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiment of the present invention, all other embodiments obtained by those skilled in the art without creative efforts belong to the protection scope of the present invention.

Examples

As shown in figure 1 of the drawings, in which,

a kitchen waste sewage discharge treatment system comprises an adjusting tank 1, a solid-liquid separation chamber 3, an air flotation chamber 6, a high-concentration multistage AO pool 7, an MBR (membrane bioreactor) chamber 9, a Fenton oxidation chamber 10, a blow-off tower 12 and a biological filter 13, sewage percolate is discharged into the adjusting tank 1 through a water pump and is subjected to aeration stirring homogenization and uniform amount treatment through an air aeration pipe, high-concentration sludge in the adjusting tank 1 enters the solid-liquid separation chamber 3 through a sludge discharge pump, the high-concentration sludge entering the solid-liquid separation chamber 3 is dewatered under the action of a mechanical dewatering machine and is conveyed into a sludge chamber 5, the sewage mechanically dewatered through the solid-liquid separation chamber 3 enters the air flotation chamber 6 below the air flotation chamber, air flotation effluent passing through the air flotation chamber 6 automatically flows into the high-concentration multistage AO pool 7 through gravity to remove soluble organic pollutants in the sewage, the sewage containing active sludge after being treated through the high-concentration AO pool 7 enters the MBR chamber 9 through the water pump, permeate liquid after being treated through the tubular MBR chamber 9 is discharged into the Fenton oxidation chamber 10 through the water pump to be subjected to strong oxidation aeration oxidization treatment, the sewage automatically flows into the biological filter 13 after being treated through the Fenton oxidation chamber 13, and enters the biological filter 13 after being further being blown off ammonia nitrogen by the ammonia nitrogen. The stripping tower absorption liquid treated by the stripping tower 12 flows back to the high-concentration multistage AO pool 7 through a water pump.

In the sludge reflux treatment of the system, upper-layer scum treated by the air flotation tank of the air flotation compartment 6, residual sludge treated by the high-concentration multi-stage AO tank 7 and denitrification sludge treated by the biological filter 13 are respectively conveyed into the adjusting tank 1 through a sludge pump.

The dosing system of the system comprises a first dosing tank 4, a second dosing tank 11 and a third dosing tank 14, wherein the first dosing tank 4 is respectively connected with the solid-liquid separation chamber 3 and the air flotation chamber 6, and the first dosing tank 4 comprises a PAM metering pump, a PAM dissolving tank, a PAC metering pump and a PAC dissolving tank; the second dosing tank 11 is connected with the Fenton oxidation bin 10, and the second dosing tank 11 comprises a sulfuric acid metering pump, a sulfuric acid dissolving tank, a ferrous sulfate metering pump, a ferrous sulfate dissolving tank, a hydrogen peroxide metering pump, a hydrogen peroxide dissolving tank, an alkali liquor metering pump and an alkali liquor dissolving tank; the third dosing tank 14 is connected with the biological filter 13, and the third dosing tank 14 comprises a sodium acetate metering pump and a sodium acetate dissolving tank.

Wherein, the oxygen system of this system includes first oxygen suppliment railway carriage or compartment 2 and second oxygen suppliment railway carriage or compartment 8, and first oxygen suppliment railway carriage or compartment 2 is the equalizing basin 1 air feed, and second oxygen suppliment railway carriage or compartment 8 is the multistage AO pond 7 air feed of high concentration, and first oxygen suppliment railway carriage or compartment 2 and second oxygen suppliment railway carriage or compartment 8 are the roots blower.

The utility model discloses a working process and theory of operation brief explain:

kitchen waste sewage enters an adjusting tank 1 of a sewage treatment station through a water pump. Waste liquid after anaerobic biogas production, floating slag on the upper layer of the air flotation, residual sludge of the high-concentration multi-stage AO pool 7, sludge of the Fenton oxidation bin 10 and supplement water serving as hydrolysate for adjusting the BOD concentration of raw water are all gathered, and aeration stirring homogenization and quantity equalization are carried out.

High-concentration sludge (SS is about 20g/L-50 g/L) discharged from the regulating tank 1 is subjected to chemical dosing conditioning in the solid-liquid separation chamber 3 and then is subjected to mechanical dehydration treatment by a mechanical dehydrator, and the dehydrated sludge (the water content is lower than 85%) enters a sludge bin 5. The pond front end is equipped with first dosing tank 4, utilizes and thoughtlessly congeals, precipitation to get rid of the colloid suspended solid and the heavy metal that are difficult to biochemical degradation in the sewage, reduces the suppression to follow-up biochemical system, plays certain guard action to subsequent membrane system simultaneously, prolongs the life of membrane.

After mechanical dehydration, SS in the sewage is largely removed (the removal efficiency is more than 95%), but the SS of the supernatant reaches 1000-1500 mg/L, which still has great influence on the bacterial culture of a subsequent biochemical system. Therefore, an air flotation chamber 6 is arranged in front of the biochemical system for air flotation treatment.

After air floatation, a large amount of SS in the sewage is removed, and the SS is less than or equal to 300mg/L. But COD, ammonia nitrogen, total nitrogen and chromaticity indexes far exceed the discharge standard. For this purpose, a high-concentration multi-stage AO pool 7 is arranged at the rear end section of the air floatation facility to remove soluble organic pollutants in the sewage. The air-float effluent automatically flows into a high-concentration multistage AO pool 7, and the absorption liquid (main component: ammonium sulfate) of the stripping tower enters the high-concentration multistage AO pool 7 through a pump. Through the nitrification-denitrification reaction generated by the multi-stage AO (anoxic-aerobic) of the microorganisms, the total ammonia nitrogen and the total nitrogen in the water body are finally removed from the water body in the form of nitrogen. The multistage AO comprises a plurality of nitrification tanks (zones) and denitrification tanks (zones), and has the main functions of:

a denitrification tank: the dissolved oxygen provided by the reflux digestive liquid is utilized to maintain the anoxic environment of the system, nitrate nitrogen in the reflux digestive liquid is reduced into nitrogen through the denitrification process, and simultaneously, an organic carbon source in the sewage stock solution is consumed, so that the aim of pollution-free biological denitrification is fulfilled.

A nitrification tank: providing dissolved oxygen of 2-4mg/L of a dissolved oxygen maintaining system through an aeration pipe, culturing nitrifying bacteria to nitrify ammonia nitrogen in the sewage, and converting the nitrifying bacteria into nitrate nitrogen substances; the ammonia nitrogen removal rate (conversion rate) is ensured to be more than 96%.

The MBR chamber 9 is additionally arranged on the basis of the high-concentration multistage AO pool 7, and the MBR membrane can effectively intercept organic matters and SS (suspended solids) and improve the effluent quality; secondly, the SRT of the system can be prolonged by intercepting sludge by the MBR on the premise of increasing the tank capacity without increasing hydraulic retention time, so that the strain with longer generation time, namely the nitrifying autotrophic bacteria, can effectively grow in the tank to complete the degradation of ammonia nitrogen. The inlet water containing activated sludge is removed by a hollow fiber membrane with the aperture of 0.1 mu m, the filtered activated sludge is deposited on the surface of the membrane filaments, the permeate is sent to the next-stage treatment system by a suction pump, the activated sludge intercepted by the micropores of the ultrafiltration membrane returns to the biochemical reactor to improve the sludge concentration in the tank, the biological treatment is continued, the microorganisms and suspended matters are intercepted in the system, and the outlet water is sterile and has no suspended matters.

Under the strong oxidation action of the Fenton oxidation bin 10, COD and BOD5 which cannot be biodegraded in the AO stage are oxidized and degraded, and total nitrogen (mainly organic nitrogen) which cannot be biodegraded in the AO stage is oxidized into ammonia nitrogen; adding alkali liquor into the effluent after Fenton oxidation to adjust the pH value, and entering a next treatment unit.

The Fenton oxidation effluent gravity automatically flows into a stripping tower 12, the stripped ammonia gas is absorbed by sulfuric acid, absorption liquid (the main component is ammonium sulfate) is pumped back to a high-concentration multistage AO through a pump, and ammonia nitrogen and total nitrogen in a water body are finally removed from the water body in a nitrogen form through nitration-denitrification reaction.

The ammonia nitrogen which is not blown off enters the biological filter 13 along with the sewage for further treatment. The ammonia nitrogen passes through a biological filter (a nitrification filter and a denitrification filter), and the total ammonia nitrogen and the total nitrogen of the water body are finally removed from the water body in a nitrogen form through nitrification-denitrification reaction. And mixing the effluent of the biological filter with the effluent of the AO pool and then discharging.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are used only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly referring to the number of technical features being grined. Thus, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted", "connected" and "connected" are to be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected: either mechanically or electrically: the terms may be directly connected or indirectly connected through an intermediate medium, or may be a communication between two elements.

The above description is only a preferred embodiment of the present invention, and should not be used to limit the present invention, it should be noted that, for those skilled in the art, without departing from the technical principle of the present invention, a plurality of improvements and modifications can be made, and these improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. A kitchen waste sewage discharge treatment system comprises a regulating tank (1), a solid-liquid separation chamber (3), an air flotation chamber (6) and a high-concentration multi-stage AO tank (7), it is characterized by also comprising an MBR (membrane bioreactor) bin (9), a Fenton oxidation bin (10), a blow-off tower (12) and a biological filter (13), wherein sewage percolate is discharged into the regulating tank (1) through a water pump and is subjected to aeration stirring homogenization and quantity equalization treatment through an air aeration pipe, the high-concentration sludge in the regulating tank (1) enters a solid-liquid separation chamber (3) through a sludge discharge pump, the high-concentration sludge entering the solid-liquid separation chamber (3) is dehydrated by the action of a mechanical dehydrator and then is conveyed into a sludge bin (5), the sewage after being mechanically dehydrated by the solid-liquid separation chamber (3) enters an air floatation tank in an air floatation chamber (6) below, the air-floated effluent water passing through the air-floated chamber (6) automatically flows into a high-concentration multi-stage AO pool (7) through gravity to remove soluble organic pollutants in the sewage, the sewage containing activated sludge after being treated by the high-concentration multi-stage AO pool (7) enters an MBR (membrane bioreactor) bin (9) through a water pump, the permeate after being treated by the tubular ultrafiltration membrane of the MBR bin (9) is discharged into a Fenton oxidation bin (10) through a water pump for strong oxidation treatment, the effluent of the Fenton oxidation automatically flows into a stripping tower (12) through gravity, then ammonia nitrogen which is not blown off enters a biological filter (13) along with sewage for further treatment.

2. The kitchen waste sewage discharge treatment system according to claim 1, wherein the upper layer scum treated by the floatation tank of the floatation tank (6), the residual sludge treated by the high concentration multi-stage AO tank (7), and the denitrification sludge treated by the biological filter (13) are respectively conveyed into the adjusting tank (1) by a sludge pump.

3. The kitchen waste sewage discharge treatment system according to claim 1, wherein the stripping tower absorption liquid treated by the stripping tower (12) flows back to the high-concentration multi-stage AO pool (7) through a water pump.

4. The kitchen waste sewage discharge treatment system according to claim 1, further comprising a first dosing tank (4), a second dosing tank (11) and a third dosing tank (14), wherein the first dosing tank (4) is respectively connected with the solid-liquid separation chamber (3) and the air flotation chamber (6), and the first dosing tank (4) comprises a PAM metering pump, a PAM dissolving tank, a PAC metering pump and a PAC dissolving tank; the second dosing tank (11) is connected with the Fenton oxidation bin (10), and the second dosing tank (11) comprises a sulfuric acid metering pump, a sulfuric acid dissolving tank, a ferrous sulfate metering pump, a ferrous sulfate dissolving tank, a hydrogen peroxide metering pump, a hydrogen peroxide dissolving tank, an alkali liquor metering pump and an alkali liquor dissolving tank; the third dosing tank (14) is connected with the biological filter (13), and the third dosing tank (14) comprises a sodium acetate metering pump and a sodium acetate dissolving tank.

5. The kitchen waste sewage discharge treatment system according to claim 1, further comprising a first oxygen supply compartment (2) and a second oxygen supply compartment (8), wherein the first oxygen supply compartment (2) supplies air for the conditioning tank (1), the second oxygen supply compartment (8) supplies air for the high concentration multi-stage AO tank (7), and the first oxygen supply compartment (2) and the second oxygen supply compartment (8) are both Roots blowers.

6. The kitchen waste sewage discharge treatment system according to claim 1, characterized in that said high-concentration multi-stage AO pool (7) comprises a plurality of nitrification pools and a plurality of denitrification pools.

7. The kitchen waste sewage disposal system according to claim 1, wherein said biofilter (13) comprises a plurality of nitrification filters and a plurality of denitrification filters.