Wine-brewing wastewater treatment system without additional medicament in anoxic tank

Abstract

The utility model discloses a wine brewing wastewater treatment system without additional chemicals in an anoxic tank. Comprising a regulating tank, a hydrolysis acidification tank, at least one anaerobic tank, a first sedimentation tank, an anoxic tank, at least one aerobic tank, a mid-sedimentation tank and a second sedimentation tank which are arranged in sequence according to a treatment sequence, wherein the brewing wastewater treatment system without additional chemicals in the anoxic tank further comprises a first connecting pipe and a second connecting pipe; one end of the first connecting pipe is communicated with the regulating tank, the other end of the first connecting pipe is communicated with the anoxic tank, and a first pump is mounted on the first connecting pipe; one end of the second connecting pipe is communicated with the mid-sedimentation tank, the other end of the second connecting pipe is communicated with the anoxic tank, and a second pump is mounted on the second connecting pipe; the second pump is used for pumping nitrification liquid at the lower part of the mid-sedimentation tank into the anoxic tank. The utility model solves the problem that a large amount of nutritional agent needs to be added into the anoxic tank during the operation of the sewage station.

Description

Technical Field

[0001] The utility model relates to the field of environmental protection water treatment, in particular to a brewing wastewater treatment system without additional chemicals in an anoxic tank. Background Art

[0002] The brewing industry is an industry with relatively heavy water pollution. The production wastewater has complex components, high COD and total nitrogen contents, and is difficult to treat. Among them, the removal of total nitrogen has always been a difficult problem in the industry.

[0003] Traditional brewing wastewater treatment plants often adopt processes such as Figure 1 AAO (anaerobic - anoxic - aerobic). Among them, the anaerobic tank consists of a first - stage UASB anaerobic tank and a second - stage UASB anaerobic tank, the aerobic tank consists of 6 ordinary aerobic tanks, and a middle sedimentation tank is connected behind the aerobic tank. During operation, the muddy slurry with mud at the lower part of the middle sedimentation tank is pumped to the front anoxic tank by a pump. In the anoxic tank, the mixed liquid reacts in the anoxic tank with anoxic bacteria such as acetic acid bacteria to remove total nitrogen (when reacting, glucose is added according to the total nitrogen content, and the addition ratio is that when the total nitrogen mass is 1, the added mass of glucose is 6).

[0004] CN117164178A discloses a brewing wastewater treatment system without additional chemicals in an anoxic tank. This method sets an MBR membrane in the middle sedimentation tank to form an MBR membrane tank, and an aeration fan is set in the MBR membrane tank, which has a good treatment effect on brewing wastewater.

[0005] However, CN117164178A has the following two problems:

[0006] ① The total nitrogen (TN) content of the raw water of the treated brewing production wastewater is not high, less than 200 mg / L. If it exceeds 200 mg / L, the effluent TN does not meet the discharge standard.

[0007] ② The cost is relatively high. Among them, the prices of devices such as the MBR membrane tank are relatively high, increasing the treatment cost, and the cost of glucose added in the anoxic tank is also relatively high. Summary of the Utility Model

[0008] Based on the above problems, the utility model provides a brewing wastewater treatment system without additional chemicals in an anoxic tank, aiming to improve at least one of the problems mentioned in the background art.

[0009] The technical solution is: a brewing wastewater treatment system without additional chemicals in an anoxic tank,

[0010] which treats brewing production wastewater, including: a regulating tank, a hydrolysis acidification tank, at least one anaerobic tank, a first sedimentation tank, an anoxic tank, at least one aerobic tank, a middle sedimentation tank, and a second sedimentation tank, which are arranged in sequence according to the treatment order:

[0011] The brewing wastewater treatment system without external agents in the anoxic tank further includes a first connecting pipe and a second connecting pipe;

[0012] One end of the first connecting pipe is connected to the regulating tank, and the other end is connected to the anoxic tank. A first pump is installed on the first connecting pipe; the first pump is used to pump the raw water in the regulating tank into the anoxic tank.

[0013] One end of the second connecting pipe is connected to the intermediate sedimentation tank, and the other end is connected to the anoxic tank. A second pump is installed on the second connecting pipe; the second pump is used to pump the nitrified liquid at the lower part of the intermediate sedimentation tank into the anoxic tank.

[0014] Optionally, the number of anaerobic tanks is 2, which are successively a primary UASB anaerobic tank and a secondary UASB anaerobic tank.

[0015] Optionally, the brewing wastewater treatment system further includes a grille, which is arranged before the regulating tank.

[0016] Optionally, the number of aerobic tanks is 6, and the 6 aerobic tanks are arranged in sequence. The sludge content in the first aerobic tank is 30% - 40%.

[0017] Optionally, the second sedimentation tank is an inclined tube sedimentation tank.

[0018] Principle and beneficial effects of the utility model:

[0019] By sending the raw water in the regulating tank into the anoxic tank through the first pump, without using the MBR membrane after the aerobic tank, on the one hand, the TN content of the raw water can be treated to 500 mg / L. On the other hand, the MBR membrane and glucose are saved. At the same time, the load caused by the reduction of the treatment volume in the processes before the anoxic tank (such as the hydrolysis acidification tank, anaerobic tank, etc.) is also reduced. Description of the drawings

[0020] Figure 1 Schematic diagram of the brewing wastewater treatment system in the background technology of the present utility model;

[0021] Figure 2 Schematic diagram of the brewing wastewater treatment system of the present utility model. Detailed implementation manners

[0022] The present utility model will be further described below in conjunction with the drawings.

[0023] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "longitudinal", "lateral", "horizontal", "inner", "outer", "front", "rear", "top", "bottom", etc. is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product of the present utility model is usually placed during use. It is 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 a limitation to the present utility model.

[0024] In the description of the present utility model, it should also be noted that unless otherwise clearly specified and limited, the terms "set", "provided with", "installed", "connected", "communicated" should be understood in a broad sense. For example, it can be fixedly communicated, detachably communicated, or integrally communicated; it can be directly communicated or indirectly communicated through an intermediate medium, and can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0025] In the present utility model, the raw water refers to the water after the production wastewater from the brewing enterprise passes through the grille and enters the regulation tank to regulate the water volume and balance the water quality. In the present utility model, the regulation tank only has the effect of regulating the water volume and balancing the water quality (that is, no chemical liquid is added to the regulation tank).

[0026] Please refer to Figure 2 , the embodiment of the present utility model provides a brewing wastewater treatment system, including, arranged in sequence according to the treatment order: a regulation tank, a hydrolysis acidification tank, at least one anaerobic tank, a first sedimentation tank, an anoxic tank, at least one aerobic tank, a middle sedimentation tank, and a second sedimentation tank.

[0027] The brewing wastewater treatment system further includes a first connecting pipe and a second connecting pipe. One end of the first connecting pipe is communicated with the regulation tank, and the other end is communicated with the anoxic tank. A first pump is installed on the first connecting pipe. One end of the second connecting pipe is communicated with the middle sedimentation tank, and the other end is communicated with the anoxic tank. A second pump is installed on the second connecting pipe. The first pump is used to pump the raw water in the regulation tank into the anoxic tank, and the second pump is used to pump the nitrification liquid at the lower part of the middle sedimentation tank into the anoxic tank.

[0028] The calculation formula for the amount of raw water pumped from the regulation tank into the anoxic tank is as follows:

[0029]

[0030] Wherein:

[0031] Q 补 = the amount of raw water supplemented into the anoxic tank by the first pump (m 3 / h);

[0032] Q 回 = The amount of nitrified liquid pumped into the anoxic tank by the second pump (m 3 / h)

[0033] C 中 = The COD of the middle sedimentation tank (mg / L)

[0034] TN 中 = The TN of the middle sedimentation tank (mg / L)

[0035] Q 酸 = The flow rate flowing from the regulating tank into the hydrolysis acidification tank (m 3 / h)

[0036] C 缺 = The cod of the anoxic tank (mg / L)

[0037] TN 缺 = The TN of the anoxic tank (mg / L)

[0038] TN 原 = The TN of the raw water (mg / L)

[0039] C 原 = The COD of the raw water (mg / L);

[0040] The amount of raw water = Q 补 +Q 酸 ;

[0041] In the present utility model, the dissolved oxygen in the anoxic tank is controlled at 0.2 - 0.5 mg / L, the temperature of the anoxic tank is about 30 °C, the anoxic bacteria are acetic acid bacteria (other anoxic bacteria can also be used), and the Ph is 7.5 - 8. In the anoxic tank of the present utility model, the raw water pumped in by the first pump replaces glucose as a nutrient agent, utilizes the nutrient components in the raw water, and through biochemical action, the total nitrogen is effectively removed.

[0042] Furthermore, to ensure better operation of the water treatment system, the number of anaerobic tanks is 2, which are successively the first - stage UASB anaerobic tank and the second - stage UASB anaerobic tank. The second sedimentation tank is an inclined - tube sedimentation tank. The brewing wastewater treatment system also includes a grille, which is arranged before the regulating tank.

[0043] The brewing wastewater treatment system without external agents in the anoxic tank provided by the embodiment of the present utility model uses the brewing wastewater treatment system provided by the embodiment of the present utility model for treatment.

[0044] Further, to ensure better removal effect, the number of aerobic tanks is 6. The 6 aerobic tanks are arranged in sequence. The sludge volume in the first aerobic tank (i.e., the sedimentation ratio: take 1000 ml of water sample from the aeration tank of the sewage treatment plant with a graduated cylinder, let it stand for 30 minutes, and express the ml of the flocculent precipitate as a percentage, which is called the sedimentation ratio) is 30% - 40%. Due to the self-flow of water, the sludge will be carried to the rear end, and the sludge volume in the subsequent aerobic tanks gradually increases.

[0045] Further, to ensure that each aerobic tank has an appropriate sedimentation ratio to achieve better sewage treatment effect, the sedimentation ratio of the sludge in the latter aerobic tank is 5 - 10% higher than that in the previous aerobic tank.

[0046] Comparative Example 1

[0047] This comparative example is based on the system that has been in mature operation in the background technology Figure 1 Install MBR, aeration blower, etc. in the middle sedimentation tank (i.e., form the system adopted in the embodiment of CN117164178A). The sludge return pump in CN117164178A is the second pump. That is, the system and operating parameters of this comparative example are the same as those of the embodiment of CN117164178A, and the treated water quality is also basically the same.

[0048] In this comparative example, the raw water test values of the regulation tank are as shown in Table 1 below.

[0049] In this comparative example, in the anoxic tank, the external nutrient agent is glucose, and the addition amount of glucose is based on the following: if the total nitrogen mass in the anoxic tank is 1, then 6 of glucose is added, and the ratio of the two is 1:6 (the addition principle in the operation of the embodiment of CN117164178A is also added according to this principle).

[0050] The test results of the wastewater quality after treatment in this comparative example are as shown in Table 1 below.

[0051] Comparative Example 2

[0052] The difference between this comparative example and Comparative Example 1 is only that the treated water quality is different.

[0053] In this comparative example, the raw water test values of the regulation tank are as shown in Table 1 below.

[0054] The test results of the wastewater quality after treatment in this comparative example are as shown in Table 1 below.

[0055] Comparative Example 3

[0056] The differences between this comparative example and Comparative Example 1 are as follows:

[0057] ① Remove the MBR, aeration blower, etc. installed in the middle sedimentation tank in Comparative Example 1 (i.e., restore the system that has been in mature operation in the background technology Figure 1 )

[0058] ② The treated water quality is different. The water quality treated in this comparative example is basically the same as that in Comparative Example 2.

[0059] In this comparative example, the detected values of the raw water in the regulating tank are shown in Table 1 below.

[0060] The detected results of the wastewater quality after treatment in this comparative example are shown in Table 1 below.

[0061] Example 1

[0062] The differences between this example and Comparative Example 3 are as follows:

[0063] ① A first connecting pipe is connected between the regulating tank and the anoxic tank on the system of Comparative Example 3, and a first pump is installed on the pipe.

[0064] ② Glucose is not added to the anoxic tank, and the raw water is added from the regulating tank to the anoxic tank through the first connecting pipe according to Equation 1.

[0065] The water quality treated in this comparative example is basically the same as that in Comparative Example 2.

[0066] In this comparative example, the detected values of the raw water in the regulating tank are shown in Table 1 below.

[0067] The detected results of the wastewater quality after treatment in this comparative example are shown in Table 1 below.

[0068] Example 2

[0069] The difference between this example and Example 1 is only that the treated water quality is different.

[0070] The water quality treated in this comparative example is basically the same as that in Comparative Example 1.

[0071] In this comparative example, the detected values of the raw water in the regulating tank are shown in Table 1 below.

[0072] The detected results of the wastewater quality after treatment in this comparative example are shown in Table 1 below.

[0073] Example 3

[0074] The differences between this example and Comparative Example 1 are as follows:

[0075] ① A first connecting pipe is connected between the regulating tank and the anoxic tank on the system of Comparative Example 1, and a first pump is installed on the pipe.

[0076] ② Glucose is not added to the anoxic tank, and the raw water is added from the regulating tank to the anoxic tank through the first connecting pipe according to Equation 1.

[0077] The water quality treated in this comparative example is basically the same as that in Comparative Example 1.

[0078] In this comparative example, the detected values of the raw water in the regulating tank are shown in Table 1 below.

[0079] The wastewater quality test results after treatment in this comparative example are shown in Table 1 below.

[0080] Table 1

[0081]

[0082]

[0083] Note: In Table 1, the units of COD and TN are both mg / L.

[0084] As can be seen from Table 1, by using the nutrient components in the raw brewing water as the nutrient agent in the anoxic tank, without adding external agents in the anoxic tank and without using the MBR membrane after the aerobic tank, not only the problem of adding a large amount of nutrient agent to the anoxic tank during the operation of the sewage treatment plant is solved (saving the operation cost of agents and MBR membranes, etc.), but also the raw brewing water with TN > 200 mg / L can be treated. And with the use of the automatic control system, labor is saved, and only the sampling devices and probes of each monitoring instrument need to be cleaned regularly.

[0085] In the present utility model, unless otherwise specified, they are all prior arts.

[0086] The above are only the preferred embodiments of the present utility model and are not used to limit the present utility model. For those skilled in the art, the present utility model can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. An anaerobic pond-based brewing wastewater treatment system without adding external agents for treating brewing production wastewater, characterized in that, Including, arranged successively according to the treatment sequence: an adjustment tank, a hydrolysis acidification tank, at least one anaerobic tank, a first sedimentation tank, an anoxic tank, at least one aerobic tank, a middle sedimentation tank, and a second sedimentation tank: The brewing wastewater treatment system without external agents in the anoxic tank further includes a first connecting pipe and a second connecting pipe; One end of the first connecting pipe is communicated with the adjustment tank, and the other end is communicated with the anoxic tank. A first pump is installed on the first connecting pipe; the first pump is used to pump the raw water in the adjustment tank into the anoxic tank; One end of the second connecting pipe is communicated with the middle sedimentation tank, and the other end is communicated with the anoxic tank. A second pump is installed on the second connecting pipe; the second pump is used to pump the nitrification liquid at the lower part of the middle sedimentation tank into the anoxic tank.

2. The brewing wastewater treatment system without additional chemicals in the anoxic tank according to claim 1, wherein The number of the anaerobic tanks is 2, which are successively a primary UASB anaerobic tank and a secondary UASB anaerobic tank.

3. The brewing wastewater treatment system without additional chemicals in the anoxic tank according to claim 1, characterized in that The brewing wastewater treatment system further includes a grille, which is arranged before the adjustment tank.

4. The brewing wastewater treatment system without additional chemicals in the anoxic tank according to claim 1, characterized in that, The number of the aerobic tanks is 6, and the 6 aerobic tanks are arranged in sequence. The sludge content in the first aerobic tank is 30% - 40%.

5. The brewing wastewater treatment system without external agents in the anoxic tank according to claim 1, characterized in that, The second sedimentation tank is an inclined tube sedimentation tank.

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