Hydrogen peroxide-containing wastewater treatment process system and wastewater treatment method

Abstract

The invention discloses a hydrogen peroxide-containing wastewater treatment process system and a wastewater treatment method. The hydrogen peroxide-containing wastewater treatment process system comprises a filter tank, a neutralization and sedimentation tank, an oxidation-reduction tank, a biological treatment tank and a storage tank which are communicated in sequence. According to the wastewater treatment process system, through combination of three modes of physical treatment, chemical treatment and biological treatment, particle impurities, organic matter impurities and inorganic matter impurities in wastewater containing hydrogen peroxide can be fully removed.

Description

Technical Field

[0001] The present application relates to the technical field of wastewater treatment, and specifically to a wastewater treatment process system and a wastewater treatment method containing hydrogen peroxide. Background Art

[0002] Hydrogen peroxide wastewater generally contains high-concentration sewage containing organic matter, heavy metal ions, ammonia nitrogen and other pollutants, and has the characteristics of being difficult to treat and prone to explosion. The existing wastewater treatment effect containing hydrogen peroxide is poor, and the wastewater treatment effect is not good. Summary of the invention

[0003] The purpose of the present application is to provide a wastewater treatment process system and a wastewater treatment method containing hydrogen peroxide, so as to solve the technical problems existing in the above-mentioned background technology to at least a certain extent.

[0004] To achieve the above purpose, the present application provides the following technical solution: a wastewater treatment process system containing hydrogen peroxide, comprising:

[0005] A filter box, wherein the filter box is provided with a liquid inlet and a liquid outlet, and a filter assembly is arranged inside the filter box, and the filter assembly is blocked in the filter box and is used to filter large particles of impurities in the wastewater;

[0006] A neutralization sedimentation tank, wherein a first dosing port is provided at the top of the neutralization sedimentation tank, and the first dosing port adds an acid-base neutralizer into the neutralization sedimentation tank;

[0007] The redox tank, the top of the neutralization sedimentation tank is provided with a second dosing port, the second dosing port adds a redox agent into the redox tank;

[0008] A biological treatment tank, wherein aerobic bacteria are arranged in the biological treatment tank, and the aerobic bacteria degrade organic matter in the wastewater entering the biological treatment tank;

[0009] The treated wastewater enters the storage tank, and is discharged to the outside after the wastewater in the storage tank meets the standards.

[0010] Furthermore, the filter device includes a first filter element and a second filter element, the first filter element and the second filter element are arranged in sequence in the filter box along the liquid flow direction, and the filter hole of the first filter element is larger than the filter hole of the second filter element.

[0011] Furthermore, the first filter element is a filter plate.

[0012] Furthermore, the second filter element is a molecular sieve.

[0013] Furthermore, the acid-base neutralizer is calcium hydroxide.

[0014] Furthermore, the redox agent is hydrogen peroxide.

[0015] Furthermore, the storage tank is provided with a liquid return pipe, and the liquid return pipe is connected to the liquid inlet of the neutralization sedimentation tank.

[0016] A method for treating wastewater containing hydrogen peroxide, the wastewater treatment method comprising:

[0017] The first step is physical treatment: the wastewater enters the filter box, and the filter assembly filters the large particles of impurities in the wastewater, and removes the large particles of impurities and small particles of impurities in the wastewater in turn;

[0018] The second step is chemical treatment: the wastewater enters the neutralization sedimentation tank and the oxidation-reduction tank in sequence, the acid-base neutralizer in the neutralization sedimentation tank neutralizes the pH of the wastewater, so that the heavy metals and inorganic substances in the wastewater are precipitated and removed from the wastewater; the wastewater enters the oxidation-reduction tank, hydrogen peroxide is added to perform oxidation-reduction reaction, and the organic and inorganic substances in the wastewater are degraded into soluble or easily precipitated substances;

[0019] The third step is biological treatment: the treated wastewater enters the biological treatment pool, which contains aerobic bacteria. The activity and metabolic activities of the aerobic bacteria degrade the organic matter in the wastewater, thereby removing the organic matter in the wastewater.

[0020] Compared with the prior art, the beneficial effects of this application include at least:

[0021] Since the wastewater treatment process system and wastewater treatment method containing hydrogen peroxide provided in the present application mainly include three stages: physical treatment, chemical treatment and biological treatment, particulate impurities, organic impurities and inorganic impurities in the wastewater can be fully removed, so that the wastewater can meet the discharge standards. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 The present invention is a flow chart of the wastewater treatment process system. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0024] The present application provides a wastewater treatment process system containing hydrogen peroxide, combined with Figure 1 ,include:

[0025] A filter box, a neutralization sedimentation tank, a redox tank, a biological treatment tank and a storage tank are connected in sequence. The filter box is provided with a liquid inlet and a liquid outlet, and a filter assembly is provided inside. The filter assembly is blocked in the filter box and is used to filter large particles of impurities in the wastewater; a first dosing port is provided on the top of the neutralization sedimentation tank, and the first dosing port adds an acid-base neutralizer into the neutralization sedimentation tank; a second dosing port is provided on the top of the neutralization sedimentation tank, and the second dosing port adds a redox agent into the redox tank; aerobic bacteria are provided in the biological treatment tank, and the aerobic bacteria degrade organic matter in the wastewater entering the biological treatment tank; the treated wastewater enters the storage tank, and the wastewater in the storage tank is discharged to the outside after being tested to meet the standards.

[0026] This wastewater treatment process system combines physical treatment, chemical treatment and biological treatment to fully remove particulate impurities, organic impurities and inorganic impurities in wastewater containing hydrogen peroxide.

[0027] In one embodiment, the filter device includes a first filter element and a second filter element, the first filter element and the second filter element are sequentially arranged in the filter box along the liquid flow direction, and the filter hole of the first filter element is larger than the filter hole of the second filter element.

[0028] In one embodiment, the first filter element is a filter plate having relatively large filter holes. Wastewater passes through the filter holes of the filter plate, and relatively large particle impurities are filtered out.

[0029] In one embodiment, the second filter element is a molecular sieve, and the molecular sieve is provided with smaller filter holes. The wastewater passes through the filter holes of the molecular sieve, and smaller particle impurities are filtered out.

[0030] In one embodiment, the acid-base neutralizer for hydrogen peroxide wastewater treatment is mainly calcium hydroxide. Calcium hydroxide, as a common neutralizer, is widely used in wastewater treatment. By adding calcium hydroxide, the pH value of the wastewater can be adjusted, the corrosiveness of the wastewater can be reduced, and conditions for subsequent treatment processes can be created. The role of calcium hydroxide in hydrogen peroxide wastewater treatment is to precipitate heavy metals and inorganic substances in the wastewater through acid-base neutralization reaction, thereby removing these harmful substances. In addition, calcium hydroxide can also be used as a flocculant to help remove suspended matter and colloidal substances in wastewater.

[0031] In one embodiment, the redox agent is hydrogen peroxide.

[0032] Hydrogen peroxide is a strong oxidant, commonly used in wastewater treatment. In wastewater treatment, hydrogen peroxide mainly decomposes organic or inorganic matter through redox reactions. Its chemical formula is H2O2, and it is a colorless, odorless, transparent liquid. When hydrogen peroxide is used as an oxidant, it can quickly decompose to produce oxygen and water, thereby purifying wastewater. In wastewater treatment, the specific applications of hydrogen peroxide as an oxidant include:

[0033] Sterilization and disinfection: Hydrogen peroxide has strong oxidizing properties and can be used for sterilization and disinfection. It is often used in the treatment of medical and industrial wastewater.

[0034] Bleaching effect: Hydrogen peroxide can be used as a bleaching agent to remove color substances from wastewater.

[0035] Decomposition of organic matter: Hydrogen peroxide can oxidize and decompose organic matter in wastewater, converting it into harmless substances.

[0036] In one embodiment, the storage tank is provided with a liquid return pipe, which is connected to the liquid inlet of the neutralization sedimentation tank. When the wastewater in the storage tank fails the test, the wastewater in the storage tank is circulated through the liquid return pipe until the wastewater meets the discharge standards.

[0037] A method for treating wastewater containing hydrogen peroxide, the wastewater treatment method comprising:

[0038] The first step is physical treatment: the wastewater enters the filter box, and the filter assembly filters the large particles of impurities in the wastewater, and removes the large particles of impurities and small particles of impurities in the wastewater in turn;

[0039] The second step is chemical treatment: the wastewater enters the neutralization sedimentation tank and the oxidation-reduction tank in sequence, the acid-base neutralizer in the neutralization sedimentation tank neutralizes the pH of the wastewater, so that the heavy metals and inorganic substances in the wastewater are precipitated and removed from the wastewater; the wastewater enters the oxidation-reduction tank, hydrogen peroxide is added to perform oxidation-reduction reaction, and the organic and inorganic substances in the wastewater are degraded into soluble or easily precipitated substances;

[0040] The third step is biological treatment: the treated wastewater enters the biological treatment pool, which contains aerobic bacteria. The activity and metabolic activities of the aerobic bacteria degrade the organic matter in the wastewater, thereby removing the organic matter in the wastewater.

[0041] In the present application, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0042] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise" and "counterclockwise" indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0043] It should be noted that all directional indications in the embodiments of the present application are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indication will also change accordingly.

[0044] In this application, unless otherwise clearly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" 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 a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0045] In addition, the descriptions of "first", "second", etc. in this application are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" or "second" may explicitly or implicitly include one or more features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0046] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine different embodiments or examples described in this specification.

[0047] In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the fact that they can be implemented by ordinary technicians in this field. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by this application.

[0048] Although the embodiments of the present application have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present application, and that the scope of the present application is defined by the claims and their equivalents.

Claims

1. A wastewater treatment process system containing hydrogen peroxide, characterized in that: Including sequentially connected A filter box, wherein the filter box is provided with a liquid inlet and a liquid outlet, and a filter assembly is arranged inside the filter box, and the filter assembly is blocked in the filter box and is used to filter large particles of impurities in the wastewater; A neutralization sedimentation tank, wherein a first dosing port is provided at the top of the neutralization sedimentation tank, and the first dosing port adds an acid-base neutralizer into the neutralization sedimentation tank; The redox tank, the top of the neutralization sedimentation tank is provided with a second dosing port, the second dosing port adds a redox agent into the redox tank; A biological treatment tank, wherein aerobic bacteria are arranged in the biological treatment tank, and the aerobic bacteria degrade organic matter in the wastewater entering the biological treatment tank; The treated wastewater enters the storage tank, and is discharged to the outside after the wastewater in the storage tank meets the standards.

2. A wastewater treatment process system containing hydrogen peroxide according to claim 1, characterized in that: The filter device comprises a first filter element and a second filter element, wherein the first filter element and the second filter element are sequentially arranged in the filter box along the liquid flow direction, and the filter hole of the first filter element is larger than the filter hole of the second filter element.

3. A wastewater treatment process system containing hydrogen peroxide according to claim 2, characterized in that: The first filter element is a filter plate.

4. A wastewater treatment process system containing hydrogen peroxide according to claim 2, characterized in that: The second filter element is a molecular sieve.

5. A wastewater treatment process system containing hydrogen peroxide according to claim 1, characterized in that: The acid-base neutralizer is calcium hydroxide.

6. A wastewater treatment process system containing hydrogen peroxide according to claim 1, characterized in that: The redox agent is hydrogen peroxide.

7. A wastewater treatment process system containing hydrogen peroxide according to claim 1, characterized in that: The storage tank is provided with a liquid return pipe, and the liquid return pipe is communicated with the liquid inlet of the neutralization sedimentation tank.

8. A method for treating wastewater containing hydrogen peroxide according to any one of claims 1 to 7, characterized in that: The wastewater treatment method comprises: The first step is physical treatment: the wastewater enters the filter box, and the filter assembly filters the large particles of impurities in the wastewater, and removes the large particles of impurities and small particles of impurities in the wastewater in turn; The second step is chemical treatment: the wastewater enters the neutralization sedimentation tank and the oxidation-reduction tank in sequence, the acid-base neutralizer in the neutralization sedimentation tank neutralizes the pH of the wastewater, so that the heavy metals and inorganic substances in the wastewater are precipitated and removed from the wastewater; the wastewater enters the oxidation-reduction tank, hydrogen peroxide is added to perform oxidation-reduction reaction, and the organic and inorganic substances in the wastewater are degraded into soluble or easily precipitated substances; The third step is biological treatment: the treated wastewater enters the biological treatment pool, which contains aerobic bacteria. The activity and metabolic activities of the aerobic bacteria degrade the organic matter in the wastewater, thereby removing the organic matter in the wastewater.

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