Integrated treatment system for brewing wastewater

Abstract

The utility model discloses an integrated treatment system for brewing wastewater, which comprises a raw water regulating tank, a sedimentation tank I matched with an external sewage pipe network, and at least two sub-treatment systems communicated with the output end of the raw water regulating tank in parallel, wherein each sub-treatment system comprises a pretreatment unit for carrying out chemical and oxidation treatment on the brewing wastewater; the biochemical treatment unit is used for carrying out microbial degradation and conversion on the pretreated wastewater, removing most of COD (Chemical Oxygen Demand) and reducing the concentration of ammonia nitrogen and total nitrogen; and the deep oxidation treatment unit is used for further treating COD (Chemical Oxygen Demand) in the wastewater. According to the brewing wastewater integrated treatment system provided by the utility model, wastewater treated by each subsystem can be directly used as common wastewater to be discharged in a standard reaching manner, can be recycled after reaching a renewable standard, and can be circulated to a raw water regulating tank as required to dilute and regulate raw water, so that the treatment time of each unit is shortened, and the treatment cost is reduced. And the processing efficiency and the processing capability of each unit are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of wastewater treatment. More specifically, the utility model relates to an integrated treatment system for brewing wastewater. Background Art

[0002] Yellow water is a brownish-yellow slightly viscous turbid liquid that seeps from the upper layer to the bottom of the cellar during the fermentation process of solid-state production of strong-flavor Daqu liquor. During the solid-state fermentation of Baijiu, various metabolites are formed through complex reactions under the action of the microbial community from nutrients, which contain a large amount of sugars, nitrogen-containing compounds, and organic substances such as alcohols, acids, and esters. Generally, the COD of yellow water can reach 100,000 - 300,000, far exceeding the national wastewater discharge limit standards.

[0003] In the early stage, there were no suitable disposal methods and resource utilization means for brewing wastewater such as yellow water. With the continuous innovation of brewing technology, nowadays, the yellow water generated during the brewing process is basically first fully extracted through steam distillation to obtain yellow water liquor for storage, effectively realizing the resource utilization and disposal of yellow water. However, the discharge of brewing wastewater such as yellow water is still inevitable, and the environmental problems brought by brewing wastewater will still limit the production and development of enterprises.

[0004] The composition of yellow water is complex and its COD is extremely high (containing a large amount of alcohols, esters, organic acids, starches, sugars, various organic matters, and various microorganisms). There has been no systematic and effective method for the harmless treatment of yellow water both internationally and domestically. The main treatment methods are still flocculation and biochemical methods. Specifically, such as the integrated brewing wastewater treatment equipment with the patent number 201921603401.0, and a Baijiu brewing wastewater treatment system with the patent application number 201710277750.7. However, these treatment methods and treatment effects are not ideal and are not suitable for the wastewater discharge of large brewing units.

[0005] In recent years, environmental governance technologies have been continuously developing, such as microbial technology and advanced oxidation technology. However, the direct degradation using microorganisms has a high time cost. Secondly, the direct application of advanced oxidation technology to the treatment of yellow water is not economical and efficient. Therefore, in the context of continuously improving environmental requirements, it is necessary to design and manufacture a set of harmless disposal of brewing wastewater to improve its treatment efficiency. Summary of the Utility Model

[0006] An object of the utility model is to solve the above problems and / or deficiencies and provide the advantages described hereinafter.

[0007] To achieve these objects and other advantages of the present utility model, an integrated treatment system for brewing wastewater is provided, including: a raw water regulation tank cooperating with a brewing wastewater discharge mechanism, and a sedimentation tank I cooperating with an external sewage pipe network. It further includes: at least two sub-treatment systems connected in parallel to the output end of the raw water regulation tank;

[0008] Among them, each sub-treatment system includes:

[0009] A pretreatment unit that chemically treats strong acids and high salts in the brewing wastewater and oxidizes some of the refractory and poorly biodegradable organic matters in the brewing wastewater;

[0010] A biochemical treatment unit that performs microbial degradation and transformation on the biodegradable organic matter in the pretreated wastewater, removes most of the chemical oxygen demand (COD), and reduces the ammonia nitrogen and total nitrogen concentrations in the wastewater;

[0011] A deep oxidation treatment unit that further deeply treats the COD in the wastewater after biochemical treatment;

[0012] Among them, each sub-treatment system is connected to the raw water regulation tank through a parallel pipeline, and the sedimentation tank I is connected to the raw water regulation tank through a circulation pipeline;

[0013] On the circulation pipeline and the parallel pipeline, a matching valve I and / or pump body I are respectively provided.

[0014] Preferably, a cutting mechanism is provided in the raw water regulation tank.

[0015] Preferably, the pretreatment unit includes: a pulsed photolysis cell connected to the output end of the raw water regulation tank through a connecting pipeline I;

[0016] Among them, at least one-stage filter grille and / or at least one-stage filter net are provided on the discharge side of the raw water regulation tank.

[0017] Preferably, the biochemical treatment unit includes:

[0018] An upflow anaerobic sludge bed reactor (UASB) connected to the output end of the pulsed photolysis cell through a connecting pipeline I;

[0019] An aerobic tank connected to the output end of the UASB through a connecting pipeline II.

[0020] Preferably, the biochemical treatment unit further includes:

[0021] A sedimentation tank II connecting the UASB and the aerobic tank through a corresponding connecting pipeline III;

[0022] A sedimentation tank III connecting the aerobic tank and the deep oxidation treatment unit through a corresponding connecting pipeline V;

[0023] Among them, the sedimentation tank III and the UASB are connected through a corresponding connecting pipeline VI.

[0024] Preferably, the advanced oxidation treatment unit includes:

[0025] A pulsed photo-Fenton reactor connected to the output end of the aerobic tank;

[0026] Among them, a matching valve II and / or pump body II are respectively arranged on each connecting pipeline.

[0027] Preferably, it further includes: an on-line detection unit cooperating with each treatment unit, and a control unit communicatively connected to each valve and / or each pump body;

[0028] The on-line detection unit is configured to include:

[0029] A liquid level sensing module arranged in each tank and communicatively connected to the control unit;

[0030] COD value detection modules respectively arranged in the biochemical treatment unit and the advanced oxidation treatment unit and communicatively connected to the control unit;

[0031] A water quality detection module arranged in the sedimentation tank I.

[0032] The present utility model has at least the following beneficial effects: The present utility model performs rotational treatment through multiple parallel subsystems, can perform integrated treatment on the brewing main body with continuous wastewater discharge, and the wastewater treated by each subsystem can be directly discharged up to standard as ordinary wastewater, or can be reused as reclaimed water after meeting the renewable standard, or can be cycled to the raw water regulation tank as needed to dilute and regulate the raw water, so as to reduce the treatment time of each unit and improve the treatment efficiency and treatment capacity of each unit.

[0033] Other advantages, objectives and features of the present utility model will be partially reflected by the following description, and partially will also be understood by those skilled in the art through the research and practice of the present utility model. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 It is the overall schematic diagram of the integrated treatment system for brewing wastewater in an embodiment of the present utility model;

[0035] Figure 2 It is the system schematic diagram of the sub-treatment system in an embodiment of the present utility model. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0036] The following further describes the present utility model in detail with reference to the drawings, so that those skilled in the art can implement it according to the description in the specification.

[0037] It should be understood that terms such as "having", "including", and "comprising" used herein do not exclude the presence or addition of one or more other elements or combinations thereof.

[0038] It should be noted that in the description of the present utility model, the orientation or positional relationship indicated by the terms is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation of the present utility model. In addition, the terms "Ⅰ" and "Ⅱ" are only used for descriptive purposes and should not be understood as indicating or implying relative importance.

[0039] In the description of the present utility model, unless otherwise clearly specified and defined, terms such as "installed", "provided with", "sheathed / connected", "connected", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection. It can be a mechanical connection or an electrical connection. It can be directly connected or indirectly connected through an intermediate medium. It 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 circumstances.

[0040] Embodiment 1

[0041] An integrated treatment system for brewing wastewater has a structure as Figure 1-2 shown, including: a raw water regulation tank 1 cooperating with the brewing wastewater discharge mechanism, a sedimentation tank Ⅰ 2 cooperating with the external sewage pipe network, and further including: at least two sub-treatment systems 3 connected in parallel to the output end of the raw water regulation tank 1;

[0042] Among them, each sub-treatment system 3 includes:

[0043] A pretreatment unit 30 for chemically treating strong acids and high salts in the brewing wastewater and performing advanced oxidation treatment on some of the refractory and poorly biodegradable organic matters in the wastewater;

[0044] A biochemical treatment unit 31 for performing microbial degradation and conversion treatment on the biodegradable organic matter in the pretreated wastewater, removing most of the chemical oxygen demand COD, and reducing the concentrations of ammonia nitrogen and total nitrogen in the wastewater;

[0045] A deep oxidation treatment unit 32 for further deeply treating the COD in the wastewater after biochemical treatment;

[0046] Among them, each sub-treatment system 3 is connected to the raw water regulation tank 1 through a parallel pipeline 4, and the sedimentation tank Ⅰ 2 is connected to the raw water regulation tank 1 through a circulation pipeline 5;

[0047] On the circulation pipeline 5 and the parallel pipeline 4, valves I 6 and / or pump bodies I 7 are respectively arranged in a matching manner.

[0048] Working principle: In actual application, the raw water regulating tank 1 receives a large amount of wastewater discharged by the brewing wastewater discharge mechanism for temporary storage or transfer to the parallel pipeline 4 at the front end of the corresponding sub-treatment system 3;

[0049] By switching the working states of the valves I 6 and / or pump bodies I 7 on the parallel pipeline 4, the selection of whether each subsystem is in the state of receiving wastewater is realized;

[0050] After each subsystem receives the brewing wastewater, the pretreatment unit 30 generates hydroxyl radical active species by photo-exciting hydrogen peroxide to degrade some biotoxic organic matters in the brewing wastewater (also known as yellow water), greatly improving the biodegradability of the yellow water;

[0051] The pretreated wastewater is discharged to the biochemical treatment unit 31 to convert the organic matter in the yellow water into (biogas) methane and carbon dioxide and other gases, while removing most of the COD. At the same time, in the anaerobic environment, organic nitrogen is converted into harmless nitrate by nitrification and the nitrate is reduced to nitrogen;

[0052] For the wastewater after biochemical treatment, the remaining COD is removed by deep oxidation treatment through the deep oxidation treatment unit 32 to meet the national discharge standards, and is discharged into the ordinary sewage discharge pipeline through the pipeline arranged on the sedimentation tank I 2, or the sewage in the sedimentation tank I 2 is circulated to the raw water regulating tank 1 at a ratio of 1:(1 - 1.5) according to needs for diluting or re-treating the raw water to improve the treatment efficiency of the subsystem or ensure that it meets the discharge requirements.

[0053] Embodiment 2

[0054] This Embodiment 2 is a preferred embodiment of the present utility model, and the specific structure is as Figure 1-2 shown, and the following improvements are disclosed on the basis of Embodiment 1:

[0055] The pretreatment unit 30 includes: a pulsed photolysis cell communicated with the output end of the raw water regulating tank 1;

[0056] Wherein, at least one-stage filter grille and / or at least one-stage filter screen (not shown) are arranged on the discharge side of the raw water regulating tank 1. In this solution, large impurities are removed by the matching filter grille arranged at the front end of the pulsed photolysis cell, and smaller impurities are filtered by the multi-stage arranged (i.e., the filter aperture decreases along with the flowing direction of the sewage) filter screen to prevent it from blocking the pipeline;

[0057] In addition, a cutting mechanism (not shown, whose structure is similar to that of the cutting mechanism of a wall-breaking soymilk machine, so its structure will not be described here) is provided in the raw water regulating tank 1. Through the setting of the cutting mechanism, large impurities in the raw water are broken to prevent blockage of the pipeline, ensure the stability during the long-term use of the equipment, and achieve continuous operation.

[0058] The biochemical treatment unit 31 includes:

[0059] An upflow anaerobic sludge bed reactor UASB 311 communicated with the output end of the pulsed photolysis cell through a connecting pipeline I 310;

[0060] An aerobic tank 313 communicated with the output end of the UASB 311 through a connecting pipeline II 312;

[0061] A sedimentation tank II 315 connecting the UASB 311 and the aerobic tank 313 through a corresponding connecting pipeline III 314;

[0062] A sedimentation tank III 316 connecting the aerobic tank 313 and the advanced oxidation treatment unit 32 through a corresponding connecting pipeline V 316;

[0063] Among them, the sedimentation tank III 315 and the UASB 311 are communicated through a corresponding connecting pipeline VI 317.

[0064] The advanced oxidation treatment unit 32 includes:

[0065] A pulsed photo-Fenton tank communicated with the output end of the aerobic tank 313;

[0066] Among them, matching valves II 318 and / or pump bodies II 319 are respectively arranged on each connecting pipeline. Through the cooperation of the valves II 318 and / or the pump bodies II 319, the connection and disconnection selection between each unit and between each tank can be completed, so that the working time of each unit and each tank meets the requirements, the reaction is sufficient, and thus the working effect of each link meets the use needs.

[0067] Working principle: First, the pretreatment unit 30 uses a pulsed photolysis cell, that is, the yellow water is pretreated by pulsed light, that is, hydroxyl radical active species are generated by photo-exciting hydrogen peroxide to degrade some biotoxic organic substances in the yellow water, greatly improving the biodegradability of the yellow water;

[0068] Then, the biochemical treatment unit 31 uses an upflow anaerobic sludge bed reactor (UASB) 311 to convert the organic matter in the yellow water into gases such as (biogas) methane and carbon dioxide, while removing most of the COD. At the same time, in the anaerobic environment, organic nitrogen is converted into harmless nitrate through nitrification; then, the COD is further removed through an aerobic tank, and the nitrate is reduced to nitrogen through denitrification;

[0069] Furthermore, the advanced oxidation treatment unit 32 uses a pulsed photo-Fenton tank, that is, the remaining COD is deeply oxidized and removed through the pulsed photo-Fenton technology to meet the national discharge standards. At the same time, by organically combining the above links into an integrated equipment, the equipment storage space is saved, and the mobility and flexibility of the sewage treatment equipment are improved.

[0070] It should be noted that in this solution, the specific structures and connection methods of the pulsed photolysis tank (such as the industrial sewage treatment process and system based on the high-voltage nanosecond pulsed electric field technology with the patent application number 201610472152.0), the upflow anaerobic sludge bed reactor (UASB), and the pulsed photo-Fenton tank (such as the photo-Fenton-like treatment device with the patent application number 202022652510.0 and the continuous photo-Fenton reactor with the patent application number 201922282223.2) all belong to the existing technologies in the field of sewage treatment. Therefore, their structures, etc. will not be described anymore. In addition, the description using tanks does not mean that each unit is designed as a tank. It is only to make the description of each unit consistent. Each unit is set into different packaging structures according to needs and is connected through corresponding pipelines. In addition, the sedimentation tank quantitatively or regularly pumps out the precipitated solid substances through a sludge pump for discharge treatment.

[0071] Embodiment 3

[0072] As a preferred embodiment of the present utility model, this Embodiment 3 discloses the following improvements on the basis of Embodiment 1:

[0073] It further includes: an on-line detection unit (not shown) cooperating with each treatment unit, and a control unit (not shown) communicatively connected to each valve and / or each pump body;

[0074] The on-line detection unit is configured to include:

[0075] A liquid level sensing module (not shown) arranged in each tank and communicatively connected to the control unit. It can be set to two, one for measuring the highest water level and one for measuring the lowest water level. When the highest water level is reached, the corresponding tanks in the corresponding unit stop water inlet. When the lowest water level is reached and the treatment time of the upstream unit meets the requirements, the corresponding valve is opened for water replenishment to ensure the continuity and treatment effect during the operation of each unit;

[0076] A COD value detection module (not shown), which is respectively arranged in the biochemical treatment unit 31 and the advanced oxidation treatment unit 32 and is communicatively connected to the control unit, is used to measure the COD value in each unit to judge whether the treatment of the unit meets the requirements, and further determine whether to open the valve for corresponding water discharge operation;

[0077] A water quality detection module (not shown) arranged in the sedimentation tank I 2 is used to detect the water quality in the sedimentation tank I 2. When the water quality meets the requirements, the sewage in the sedimentation tank I 2 is discharged into the sewage pipe network. When the water quality does not meet the usage requirements, it is circulated to the raw water regulation tank 1 to dilute the raw water or perform secondary treatment on the non-compliant water.

[0078] Working principle: In this solution, the control unit obtains the liquid levels in each unit in real time and determines the treatment time of each unit according to the liquid levels. Only when the treatment time reaches and the treatment index meets the requirements, the corresponding valve is opened to discharge water to the downstream treatment unit to ensure that the treatment effect meets the needs.

[0079] The above solutions are only illustrations of a preferred example, but are not limited thereto. When implementing the present invention, appropriate substitutions and / or modifications can be made according to the needs of users.

[0080] The number of devices and the treatment scale described here are used to simplify the description of the present invention. The application, modification and variation of the present invention are obvious to those skilled in the art.

[0081] Although the embodiments of the present invention have been disclosed as above, it is not limited to the applications listed in the specification and embodiments. It can be fully applied to various fields suitable for the present invention. For those familiar with the field, additional modifications can be easily achieved. Therefore, without departing from the general concept defined by the claims and the equivalent scope, the present invention is not limited to the specific details and the illustrated examples described here.

Claims

1. An integrated treatment system for brewing wastewater, comprising: A raw water regulating tank cooperating with a brewing wastewater discharge mechanism and a sedimentation tank I cooperating with an external sewage pipe network, characterized in that it further comprises: at least two sub-treatment systems connected in parallel to the output end of the raw water regulating tank; Among them, each sub-treatment system includes: A pretreatment unit that chemically treats strong acids and high salts in the brewing wastewater and oxidizes some of the refractory and poorly biodegradable organic substances in the brewing wastewater; A biochemical treatment unit that performs microbial degradation and conversion treatment on the biodegradable organic matter in the pretreated wastewater, removes most of the chemical oxygen demand COD, and reduces the ammonia nitrogen and total nitrogen concentrations in the wastewater; A deep oxidation treatment unit that further deeply treats the COD in the wastewater after biochemical treatment; Among them, each sub-treatment system is connected to the raw water regulating tank through a parallel pipeline, and the sedimentation tank I is connected to the raw water regulating tank through a circulation pipeline; On the circulation pipeline and the parallel pipeline, a valve I and / or a pump body I are respectively arranged in a coordinated manner.

2. The integrated treatment system for brewing wastewater according to claim 1, characterized in that, The pretreatment unit includes: a pulsed photolysis cell connected to the output end of the raw water regulating tank through a connecting pipeline I; Among them, at least one-stage filter grille and / or at least one-stage filter net are arranged on the discharge side of the raw water regulating tank.

3. The integrated treatment system for brewing wastewater according to claim 2, wherein A cutting mechanism is arranged in the raw water regulating tank.

4. The integrated treatment system for brewing wastewater according to claim 2, wherein, The biochemical treatment unit includes: An upflow anaerobic sludge bed reactor UASB connected to the output end of the pulsed photolysis cell through a connecting pipeline I; An aerobic tank connected to the output end of the UASB through a connecting pipeline II.

5. The integrated treatment system for brewing wastewater according to claim 4, characterized in that, The biochemical treatment unit further includes: A sedimentation tank II connecting the UASB and the aerobic tank through a corresponding connecting pipeline III; A sedimentation tank III connecting the aerobic tank and the deep oxidation treatment unit through a corresponding connecting pipeline V; Among them, the sedimentation tank III is connected to the UASB through a corresponding connecting pipeline VI.

6. The integrated treatment system for brewing wastewater according to claim 5, wherein, The deep oxidation treatment unit includes: A pulsed photo-Fenton cell connected to the output end of the aerobic tank; Among them, a valve and / or a pump body are respectively arranged in a coordinated manner on the circulation pipeline and each connecting pipeline.

7. The integrated treatment system for brewing wastewater according to claim 1, characterized in that, It further includes: An on-line detection unit cooperating with each treatment unit and a control unit communicatively connected to the valve and / or the pump body; The on-line detection unit is configured to include: A liquid level sensing module arranged in each tank and communicatively connected to the control unit; A COD value detection module respectively arranged in the biochemical treatment unit and the deep oxidation treatment unit and communicatively connected to the control unit; A water quality detection module arranged in the sedimentation tank I.

Images