A high-load biological pretreatment method for high-concentration organic waste liquid treatment

Abstract

The application relates to a high-load biological pretreatment method for high-concentration organic waste liquid treatment and relates to the technical field of wastewater treatment.The method comprises the following steps: discharging high-concentration organic waste liquid into a preset adjusting tank; discharging the high-concentration organic waste liquid in the adjusting tank into a preset air flotation device; passing the high-concentration organic waste liquid in the air flotation device into a pre-load biological pretreatment tank; discharging high-concentration organic waste liquid sludge in the high-load biological pretreatment tank into a preset denitrification tank; discharging the high-concentration organic waste liquid sludge in the denitrification tank into a preset nitrification tank; and discharging the high-concentration organic waste liquid sludge in the nitrification tank into a preset membrane filter box to carry out sludge-water separation. The application improves a traditional process flow based on a high-load biological pretreatment tank, realizes the integration of biological reaction and precipitation under the premise of guaranteeing waste liquid treatment requirements, saves a precipitation tank, effectively eliminates safety hidden dangers, and simultaneously considers treatment efficiency and safety guarantee.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of wastewater treatment, in particular to a high-load biological pretreatment method for high-concentration organic waste liquid treatment. BACKGROUND

[0002] High-concentration organic waste liquid has the water quality characteristics of high COD (Chemical Oxygen Demand), high SS (Suspended Solids), high oil, and high viscosity. The existing physicochemical treatment technology has low removal efficiency of COD and SS in the coagulation sedimentation or flotation process, and the reagent addition amount is very large, the operation cost is high, and the water quality and quantity impact load resistance is weak. The existing biological treatment technology has good COD removal effect, but the anaerobic process needs to be equipped with a heating device, and the biogas produced by anaerobic process needs to be matched with a series of biogas treatment facilities. The whole treatment system is very complex, the engineering investment is relatively high, and the biogas has great safety hazards, high operation and maintenance requirements, and great difficulty. The specific process flow is shown in the attached Figure 1 .

[0003] Therefore, in order to meet the actual needs, the present application provides a high-load biological pretreatment technology for high-concentration organic waste liquid treatment. SUMMARY

[0004] The present application provides a high-load biological pretreatment method for high-concentration organic waste liquid treatment. Based on the high-load biological pretreatment tank, the traditional process flow is improved, the biological reaction and sedimentation are integrated under the premise of guaranteeing the waste liquid treatment demand, the sedimentation tank is saved, the safety hazards are effectively eliminated, and the treatment efficiency and safety guarantee are considered.

[0005] In the first aspect, the present application provides a high-load biological pretreatment method for high-concentration organic waste liquid treatment, which comprises the following steps:

[0006] Discharging the high-concentration organic waste liquid into a preset conditioning tank;

[0007] Discharging the high-concentration organic waste liquid in the conditioning tank into a preset flotation device;

[0008] Passing the high-concentration organic waste liquid in the flotation device into a preset high-load biological pretreatment tank;

[0009] Discharging the high-concentration organic waste liquid sludge in the high-load biological pretreatment tank into a preset denitrification tank;

[0010] Discharging the high-concentration organic waste liquid sludge in the denitrification tank into a preset nitrification tank;

[0011] The high-concentration organic waste liquid sludge in the denitrification tank is discharged into a preset membrane filter box for sludge-water separation, the high-concentration organic waste liquid sewage separated from the membrane filter box is discharged, and the high-concentration organic waste liquid sludge separated from the membrane filter box is discharged into the high-load biological pretreatment tank and the denitrification tank.

[0012] The high-load biological pretreatment tank is provided with four switchable operation conditions, including an aeration condition, a stirring condition, a sedimentation condition and a sludge discharge condition.

[0013] On the basis of the above technical scheme, the method further comprises the following steps:

[0014] The remaining high-concentration organic waste liquid sludge in the high-load biological pretreatment tank is discharged into a preset sludge treatment system.

[0015] On the basis of the above technical scheme, when the high-load biological pretreatment tank is in the aeration condition, oxygen is provided to the inside of the tank.

[0016] On the basis of the above technical scheme, when the high-load biological pretreatment tank is in the stirring condition, the stirring function is turned on to mix the reflux sludge and the sewage in the tank.

[0017] On the basis of the above technical scheme, when the high-load biological pretreatment tank is in the sedimentation condition, the aeration and stirring are stopped to allow the sludge in the tank to settle naturally.

[0018] On the basis of the above technical scheme, when the high-load biological pretreatment tank is in the sludge discharge condition, the remaining sludge in the tank is discharged.

[0019] In a second aspect, the application provides a high-load biological pretreatment method for high-concentration organic waste liquid treatment, which comprises the following steps:

[0020] Discharging high-concentration organic waste liquid into a preset conditioning tank;

[0021] Discharging the high-concentration organic waste liquid in the conditioning tank into a preset air flotation device;

[0022] Passing the high-concentration organic waste liquid in the air flotation device into a preset high-load biological pretreatment tank;

[0023] Discharging the high-concentration organic waste liquid sludge in the high-load biological pretreatment tank into a preset primary denitrification tank, a primary nitrification tank, a secondary denitrification tank and a secondary nitrification tank in sequence for secondary AO process treatment;

[0024] The high-concentration organic waste liquid sludge in the secondary nitrification tank is discharged into a preset membrane filter box for sludge-water separation, the high-concentration organic waste liquid sewage separated from the membrane filter box is discharged, and the high-concentration organic waste liquid sludge separated from the membrane filter box is discharged into the high-load biological pretreatment tank, the primary denitrification tank and the secondary denitrification tank; wherein,

[0025] The high-load biological pretreatment tank is configured with four switchable operation conditions, including an aeration condition, a stirring condition, a sedimentation condition and a sludge discharge condition.

[0026] The high-concentration organic waste liquid includes kitchen slurry and landfill leachate.

[0027] On the basis of the above technical scheme, the method further comprises the following steps:

[0028] The remaining high-concentration organic waste liquid sludge in the high-load biological pretreatment tank is discharged into a preset sludge treatment system.

[0029] On the basis of the above technical scheme, when the high-load biological pretreatment tank is in the aeration condition, oxygen is provided to the inside of the tank.

[0030] On the basis of the above technical scheme, when the high-load biological pretreatment tank is in the stirring condition, the stirring function is started to mix the reflux sludge and sewage in the tank.

[0031] On the basis of the above technical scheme, when the high-load biological pretreatment tank is in the sedimentation condition, the aeration and stirring are stopped to allow the sludge in the tank to naturally settle.

[0032] On the basis of the above technical scheme, when the high-load biological pretreatment tank is in the sludge discharge condition, the remaining sludge in the tank is discharged.

[0033] The technical scheme provided in the application has the following beneficial effects:

[0034] The application improves the traditional process based on the high-load biological pretreatment tank, realizes the integration of biological reaction and sedimentation under the premise of meeting the waste liquid treatment demand, saves the sedimentation tank, effectively eliminates the safety hazards, and takes into account the treatment efficiency and safety protection.

[0035] The application has a high organic matter removal rate (COD, SS removal rate is more than 60%, which can greatly reduce the subsequent treatment load), high COD volume load, small tank capacity, is very economical and efficient, can run at normal temperature without heating, has low operation energy consumption, compared with the existing anaerobic technology, no biogas is generated, no biogas treatment equipment is needed, the operation is safer and more economical, and the sedimentation tank can be saved by adjusting the operation mode, thereby greatly saving the engineering investment.

[0036] It is to be understood that both the foregoing general description and the following detailed description are merely intended to illustrate and teach the subject application. The accompanying drawings are included to provide a further understanding of the subject application and are incorporated in and constitute a part of this specification. The description and drawings are to be understood as illustrative of the principles of the subject application. BRIEF DESCRIPTION OF DRAWINGS

[0037] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the embodiments will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained from these drawings without creative effort.

[0038] Figure 1 Process flow chart of the conventional high-concentration organic waste liquid treatment process in the embodiments of the present application;

[0039] Figure 2 Process flow chart of the high-load biological pretreatment method for high-concentration organic waste liquid treatment provided in the embodiments of the present application;

[0040] Figure 3 Internal structure schematic diagram of the high-load biological pretreatment tank in the high-load biological pretreatment method for high-concentration organic waste liquid treatment provided in the embodiments of the present application;

[0041] Figure 4 Sectional view of the high-load biological pretreatment tank in the high-load biological pretreatment method for high-concentration organic waste liquid treatment provided in the embodiments of the present application;

[0042] Figure 5 Process flow chart of the high-load biological pretreatment method for high-concentration organic waste liquid treatment provided in the embodiments of the present application when treated by the secondary AO process;

[0043] In the drawings:

[0044] 1, pretreatment tank; 2, jet aerator; 3, circulating water pump; 4, water outlet weir; 5, air blower; 6, water inlet pipe; 7, water outlet pipe; 8, sludge return pipe; 9, sludge discharge pipe; 10, air supply pipe; 11, bypass sewage pipe; 12, circulating pump return sewage pipe; 13, air supply pipe electric butterfly valve; 14, bypass sewage pipe electric knife gate valve; 15, sludge electric knife gate valve. DETAILED DESCRIPTION

[0045] To make the purposes, technical solutions, and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are some but not all of the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by a person of ordinary skill in the art without creative work fall within the protection scope of the present application.

[0046] The embodiments of the present application are further described in detail below with reference to the drawings.

[0047] The embodiments of the present application provide a high-load biological pretreatment method for high-concentration organic waste liquid treatment. Based on a high-load biological pretreatment tank, a traditional process flow is improved. Under the premise of guaranteeing waste liquid treatment requirements, biological reaction and sedimentation are integrated, a sedimentation tank is saved, safety hazards are effectively eliminated, and treatment efficiency and safety guarantee are taken into account.

[0048] To achieve the above technical effects, the general idea of the present application is as follows:

[0049] A high-load biological pretreatment method for high-concentration organic waste liquid treatment, the method comprising the following steps:

[0050] S1, discharging high-concentration organic waste liquid into a preset adjusting tank;

[0051] S2, discharging the high-concentration organic waste liquid in the adjusting tank into a preset air flotation device;

[0052] S3, passing the high-concentration organic waste liquid in the air flotation device into a preset high-load biological pretreatment tank;

[0053] S4, discharging the high-concentration organic waste liquid sludge in the high-load biological pretreatment tank into a preset denitrification tank;

[0054] S5, discharging the high-concentration organic waste liquid sludge in the denitrification tank into a preset nitrification tank;

[0055] S6, discharging the high-concentration organic waste liquid sludge in the nitrification tank into a preset membrane filter box, carrying out sludge-water separation, discharging the high-concentration organic waste liquid sewage separated out of the membrane filter box, and discharging the high-concentration organic waste liquid sludge separated out of the membrane filter box into the high-load biological pretreatment tank and the denitrification tank; wherein,

[0056] The high-load biological pretreatment tank is configured with four switchable operation conditions, and the operation conditions include an aeration condition, a stirring condition, a sedimentation condition, and a sludge discharge condition.

[0057] The embodiments of the present application are further described in detail below with reference to the drawings.

[0058] In a first aspect, seeFigures 1-4 As shown in the specification, the embodiment of the present application provides a high-load biological pretreatment method for high-concentration organic waste liquid treatment, which comprises the following steps:

[0059] S1, discharging the high-concentration organic waste liquid into a preset adjusting tank;

[0060] S2, discharging the high-concentration organic waste liquid in the adjusting tank into a preset air flotation device;

[0061] S3, passing the high-concentration organic waste liquid in the air flotation device into a preset high-load biological pretreatment tank;

[0062] S4, discharging the high-concentration organic waste liquid sludge in the high-load biological pretreatment tank into a preset denitrification tank;

[0063] S5, discharging the high-concentration organic waste liquid sludge in the denitrification tank into a preset nitrification tank;

[0064] S6, discharging the high-concentration organic waste liquid sludge in the nitrification tank into a preset membrane filter box, carrying out sludge-water separation, discharging the high-concentration organic waste liquid sewage separated from the membrane filter box, and discharging the high-concentration organic waste liquid sludge separated from the membrane filter box into the high-load biological pretreatment tank and the denitrification tank; wherein,

[0065] The high-load biological pretreatment tank is configured with four switchable operation conditions, and the operation conditions include an aeration condition, a stirring condition, a sedimentation condition, and a sludge discharge condition.

[0066] Specifically, the high-concentration organic waste liquid includes kitchen slurry and landfill leachate.

[0067] As shown in the specification, Figure 1 It is a traditional high-concentration organic waste liquid treatment process flow chart, which needs an anaerobic reactor, and will generate biogas, which is quite different from the process of the technical solution of the present application;

[0068] In comparison, the technical solution of the embodiment of the present application also has one technical difference, that is, the biological reaction and sedimentation are integrated, and the sedimentation tank is omitted.

[0069] It should be noted that in the embodiment of the present application:

[0070] High-concentration organic waste liquid: refers to biodegradable organic wastewater containing a large amount of organic matter, which may be in a dissolved state or a suspended state. This type of wastewater is usually derived from industrial production processes, including food processing, beverage production, papermaking, petroleum chemical industry, pharmaceutical industry, kitchen slurry, landfill leachate, and high-concentration organic wastewater is characterized by high COD, high BOD (Biochemical Oxygen Demand), and high SS;

[0071] The high-concentration organic waste liquid can be at least kitchen slurry and landfill leachate.

[0072] The kitchen slurry refers to slurry after pretreatment and physical oil extraction of kitchen waste.

[0073] The landfill leachate refers to initial landfill leachate and landfill leachate in a transfer station (the landfill leachate in the later stage of landfill is not within the definition.

[0074] The technical scheme of the embodiment of the application is based on a high-load biological pretreatment tank, and the traditional process flow is improved. On the premise of guaranteeing the waste liquid treatment demand, the biological reaction and precipitation are integrated to save the sedimentation tank, effectively eliminate the safety hazard, and take into account the treatment efficiency and safety guarantee.

[0075] Further, the method further includes the following steps:

[0076] The remaining high-concentration organic waste liquid sludge in the high-load biological pretreatment tank is discharged into a preset sludge treatment system.

[0077] Further, the high-load biological pretreatment tank is configured with four switchable operating conditions, including an aeration condition, a stirring condition, a sedimentation condition, and a sludge discharge condition.

[0078] Based on the technical scheme of the embodiment of the application, in specific implementation, the following conditions are met:

[0079] The application provides a high-load biological pretreatment method for high-concentration organic waste liquid treatment. The method has high organic matter removal rate (COD and SS removal rate is more than 60%, which can greatly reduce the subsequent treatment load), high COD volume load, small tank capacity, and is very economical and efficient; and the method can be operated at normal temperature without heating, and has low operation energy consumption; compared with the existing anaerobic technology, no biogas is generated, and no biogas treatment equipment needs to be configured, and the operation is safer and more economical; and by adjusting the operation mode, the sedimentation tank can be saved, and the engineering investment is greatly saved.

[0080] As shown in the Figure 2 process flow diagram of the technical scheme of the embodiment of the application, the equipment details are as follows:

[0081] A, adjustment tank: the water quantity and water quality of kitchen slurry change greatly, and the setting of the adjustment tank can reduce the impact on the subsequent treatment system and ensure stable operation.

[0082] B, air flotation device: used for removing oil and suspended solids SS in kitchen slurry to ensure stable and efficient operation of the high-load biological pretreatment tank.

[0083] C, high-load biological pretreatment tank: biological reactor, which is a place for efficiently removing pollutants such as COD and SS in kitchen slurry.

[0084] D, denitrification tank: biological reactor for removing total nitrogen.

[0085] E, nitrification tank: biological reactor for removing COD, BOD, and ammonia nitrogen.

[0086] F, membrane filter box: device for separating sludge and water.

[0087] G, sludge return pump: pump for returning the trapped sludge to the front-end high-load biological pretreatment tank and denitrification tank, increasing the sludge concentration in the reactor, and achieving total nitrogen removal.

[0088] In the above process, after the high-concentration organic waste liquid is treated by air flotation to remove oil and suspended solids (SS), the effluent enters the high-load biological pretreatment tank from the bottom, and the sewage and sludge are mixed quickly. The sewage and sludge interact to undergo flocculation, adsorption, and biodegradation. The treated sewage is discharged from the upper weir of the pretreatment tank into the next treatment unit, and the aged sludge is periodically discharged from the bottom to ensure the biological activity in the pretreatment tank. The pretreatment tank makes full use of the short adsorption capacity of the return sludge and operates under high load and short sludge age conditions, which can quickly and efficiently reduce the COD and SS in the wastewater, greatly reducing the load of the subsequent process units.

[0089] The high-load biological pretreatment tank has multiple operating modes, which can realize the conversion of four operating conditions: aeration, stirring, sedimentation, and sludge discharge, and realize the integration of biological reaction and sedimentation, eliminating the need for a sedimentation tank. The specific explanations are as follows:

[0090] 1. Aeration condition: Provide oxygen to the pretreatment tank to keep the reactor in anoxic state, and microorganisms continuously reproduce and update in this environment to efficiently remove COD in kitchen slurry.

[0091] 2. Stirring condition: In actual operation, when the DO concentration in the reactor is too high (the water quality and quantity of high-concentration organic waste liquid change greatly, and the actual air supply may differ from the required air supply or may not be adjusted in time), the aeration can be stopped and the stirring function can be turned on to achieve effective mixing of the return sludge and sewage, ensuring efficient biological reaction.

[0092] 3. Sedimentation condition: After a period of reaction, the sludge in the reactor will age and need to stop aeration and stirring to allow the sludge to settle naturally.

[0093] 4. Sludge discharge condition: The aged residual sludge at the bottom is discharged.

[0094] Through the multiple operating modes of the high-load biological pretreatment tank, the conversion of four operating conditions: aeration, stirring, sedimentation, and sludge discharge is realized, and the integration of biological reaction and sedimentation is achieved, eliminating the need for a sedimentation tank.

[0095] As shown in the drawings of the specification Figure 3 andFigure 4 As shown in the figure, it is the internal structure diagram and cross-sectional view of the high-load biological pretreatment tank, and the structural details of the high-load biological pretreatment tank are as follows:

[0096] Pretreatment tank: biological reactor, a place for efficient removal of pollutants such as COD, SS, etc., which can use enamel assembled tank.

[0097] Jet aerator: provides oxygen for the biological reactor or acts as a stirring agent.

[0098] Circulating water pump: provides power water for the jet aerator.

[0099] Weir: set in the upper part of the pretreatment tank to stabilize the water outlet.

[0100] Blower: provides gas source for the jet aerator.

[0101] Inlet pipe: kitchen slurry flows into the biological reactor through the bottom inlet pipe.

[0102] Outlet pipe: after the kitchen slurry is pretreated, it enters the next processing unit through the upper outlet pipe.

[0103] Sludge return pipe: enters the pretreatment tank from the bottom to supplement fresh sludge for the pretreatment tank.

[0104] Sludge discharge pipe: aged sludge at the bottom of the pretreatment tank is discharged regularly.

[0105] Air supply pipe: provides oxygen for the biological reactor or acts as a stirring agent.

[0106] Bypass sewage pipe: provides power water for the jet aerator.

[0107] Circulating pump return sewage pipe: pipe between the circulating pump outlet pipe and the jet aerator.

[0108] Electric butterfly valve of air supply pipe: electric valve of air supply pipe, which realizes automatic opening and closing according to the automatic control program according to the operation needs.

[0109] Electric knife gate valve of bypass sewage pipe: electric valve of bypass sewage pipe, which realizes automatic opening and closing according to the automatic control program according to the operation needs.

[0110] Electric knife gate valve of sludge discharge: realizes automatic sludge discharge according to the automatic control program according to the operation needs.

[0111] The second aspect, as shown in the Figure 5 The embodiment of the present application provides a high-load biological pretreatment method for high-concentration organic waste liquid treatment, which comprises the following steps:

[0112] A1, discharging the high-concentration organic waste liquid into a preset adjusting tank;

[0113] A2, the high concentration organic waste liquid in the adjusting tank is discharged into a preset air floatation device;

[0114] A3, the high concentration organic waste liquid in the air floatation device is introduced into a preset high-load biological pretreatment tank;

[0115] A4, the high concentration organic waste liquid sludge in the high-load biological pretreatment tank is sequentially discharged into a preset primary denitrification tank, a primary nitrification tank, a secondary denitrification tank and a secondary nitrification tank, and is subjected to a secondary AO process treatment;

[0116] A5, the high concentration organic waste liquid sludge in the secondary nitrification tank is discharged into a preset membrane filter box, and is subjected to sludge-water separation, the high concentration organic waste liquid sewage separated out of the membrane filter box is discharged, and the high concentration organic waste liquid sludge separated out of the membrane filter box is discharged into the high-load biological pretreatment tank, the primary denitrification tank and the secondary denitrification tank; wherein,

[0117] The high-load biological pretreatment tank is provided with four switchable operation conditions, and the operation conditions include an aeration condition, a stirring condition, a sedimentation condition and a sludge discharge condition.

[0118] Specifically, the high concentration organic waste liquid includes kitchen slurry and landfill leachate.

[0119] The AO process is a process widely used in wastewater treatment.

[0120] The technical scheme of the embodiment of the application improves the traditional process flow based on the high-load biological pretreatment tank, realizes the integration of biological reaction and sedimentation under the premise of guaranteeing the waste liquid treatment demand, saves the sedimentation tank, effectively eliminates the safety hazard, and takes into account the treatment efficiency and safety guarantee.

[0121] Further, the method further includes the following steps:

[0122] The remaining high concentration organic waste liquid sludge in the high-load biological pretreatment tank is discharged into a preset sludge treatment system.

[0123] It should be noted that the high-load biological pretreatment method mentioned in the embodiment of the application and the high-load biological pretreatment method mentioned in the first aspect are similar in technical problem, technical scheme and technical effect, and are similar in technical principle, and therefore will not be repeated here.

[0124] It has to be noted that, in the present application, the terms "first", "second", etc. are used merely to distinguish one entity or action from another entity or action, without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises", "comprising", or any other variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but can also include other elements not expressly listed or inherent to such process, method, article, or apparatus. An element proceeded by "comprises... a" does not, without more constraints, exclude the presence of additional identical elements in the process, method, article, or apparatus that comprises the element.

[0125] The foregoing detailed description has set forth various embodiments of the application via the use of specific terminology. However, embodiments thereof can be practiced without the specific details ("every" embodiment) set forth above. In general, the terms used are intended to be illustrative and not restrictive, and it will be apparent to those skilled in the art that other variations and modifications of the application can be made without departing from the spirit or scope of the application. Accordingly, the scope of the application should be determined not with the foregoing description alone, but instead should be determined in accordance with the appended claims and their equivalents.

Claims

1. A high-load biological pretreatment method for treating high-concentration organic waste liquid, characterized in that, The method includes the following steps: High-concentration organic waste liquid is discharged into a pre-set regulating tank; The high-concentration organic waste liquid in the regulating tank is discharged into a pre-set air flotation device; The high-concentration organic waste liquid in the air flotation device is passed into a pre-set high-load biological pretreatment tank. The high-concentration organic waste liquid sludge in the high-load biological pretreatment tank is sequentially discharged into the preset primary denitrification tank, primary nitrification tank, secondary denitrification tank and secondary nitrification tank for secondary AO process treatment; The high-concentration organic wastewater sludge in the secondary nitrification tank is discharged into a preset membrane filter box for sludge-water separation. The high-concentration organic wastewater separated from the membrane filter box is discharged, and the high-concentration organic wastewater sludge separated from the membrane filter box is discharged into the high-load biological pretreatment tank, the primary denitrification tank, and the secondary denitrification tank. The method further includes the following steps: The remaining high-concentration organic waste liquid sludge in the high-load biological pretreatment tank is discharged into the preset sludge treatment system; When the high-load biological pretreatment tank is in aeration mode, it provides oxygen to its own interior. When the high-load biological pretreatment tank is in sedimentation mode, aeration and stirring are stopped to allow the sludge inside to settle naturally; wherein, The high-load biological pretreatment tank is equipped with four switchable operating modes, including aeration, stirring, sedimentation, and sludge discharge. The high-concentration organic waste liquid includes kitchen waste slurry and landfill leachate; The high-concentration organic waste liquid enters from the bottom of the high-load biological pretreatment tank and exits from the top of the high-load biological pretreatment tank; The high-load biological pretreatment tank is equipped with a jet aerator. The kitchen waste slurry is the slurry obtained after pretreatment and physical oil extraction of kitchen waste; The landfill leachate refers to the initial leachate from the landfill and the leachate from the waste transfer station. The leachate from the middle and later stages of the landfill is not included in the landfill leachate.

2. The high-load biological pretreatment method for treating high-concentration organic waste liquid as described in claim 1, characterized in that: When the high-load biological pretreatment tank is in stirring mode, the stirring function is turned on to mix the returned sludge with the wastewater inside.

3. The high-load biological pretreatment method for treating high-concentration organic waste liquid as described in claim 1, characterized in that: When the high-load biological pretreatment tank is in sludge discharge mode, it discharges the remaining sludge inside.

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