Purification treatment method and application of perchlorate wastewater

Abstract

The invention belongs to the technical field of wastewater treatment, and particularly relates to a purification treatment method and application of perchlorate wastewater. The method comprises the following steps: carrying out first filtration treatment, anaerobic bacteria treatment and second filtration treatment on the perchlorate wastewater to obtain purified wastewater; in the anaerobic bacteria treatment, anaerobic treatment is carried out on the perchlorate wastewater by adopting an anaerobic bacteria molecular sieve. The invention provides a purification treatment method of perchlorate wastewater. The purification treatment method comprises the following steps: removing solid particles, heavy metal ions and part of perchlorate in the perchlorate wastewater through first filtration treatment; decomposing perchlorate radicals to obtain chloride ions through anaerobic bacteria treatment, absorbing chlorine salt through second filtration treatment, and recycling. The method is widely applicable to perchlorate wastewater in various fields.

Description

Technical Field

[0001] The invention belongs to the technical field of wastewater treatment, and in particular relates to a purification method and application of perchlorate wastewater. Background Art

[0002] Perchlorate wastewater is potentially harmful to the environment and human health. It can spread rapidly through the water system and enter surface water and groundwater bodies such as rivers and lakes. If these water bodies are used as source water for drinking water, it will inevitably cause harm to human drinking water, thus directly affecting people's health. In addition, perchlorate can interfere with thyroid function and affect the health of humans and animals, especially the brain development of children. Therefore, perchlorate wastewater is an environmental issue that needs to be paid great attention to.

[0003] There are currently several main methods for treating perchlorate wastewater: biological reduction, chemical reduction, membrane separation technology, electrochemical method and ion exchange method. Biological reduction or chemical reduction methods require the addition of additional organic or inorganic substances, which will cause secondary pollution of wastewater; the cost of single membrane separation technology or electrochemical method is high and the economic efficiency is poor; and although the ion exchange method is easy to operate and has high treatment efficiency, it can only treat wastewater containing medium and low concentrations of perchlorate, and the cost of replacing and regenerating the resin is also high. Summary of the invention

[0004] In order to solve the above problems, the present invention provides a method and application of purifying perchlorate wastewater, wherein the method combines multiple separation technologies to reduce the number of replacements of membranes and resins, thereby reducing the treatment cost. After the treatment, the concentration of perchloric acid in the wastewater reaches below 0.35 mg / L, which meets the emission standards. The method is widely applicable to perchlorate wastewater in various fields.

[0005] The present invention is achieved through the following technical solutions:

[0006] In a first aspect, the present invention provides a method for purifying perchlorate wastewater, comprising the following steps:

[0007] The perchlorate wastewater is subjected to a first filtration treatment, an anaerobic bacteria treatment and a second filtration treatment to obtain purified wastewater;

[0008] In the anaerobic bacteria treatment, anaerobic bacteria molecular sieve is used to perform anaerobically treatment on the perchlorate wastewater.

[0009] The perchlorate wastewater purification method provided by the present invention comprises the following steps: first filtering treatment removes solid particles, heavy metal ions and part of perchlorate in the perchlorate wastewater; anaerobic bacteria treatment decomposes perchlorate to obtain chloride ions, and then the second filtering treatment absorbs chloride and then recovers the chloride. The method is widely applicable to perchlorate wastewater in various fields.

[0010] In some possible implementations, the preparation of the anaerobic molecular sieve comprises the following steps:

[0011] After loading the polylactic acid adhesive liquid on the surface of the molecular sieve, spraying the anaerobic bacteria spray liquid, and drying and solidifying, the anaerobic bacteria molecular sieve is obtained;

[0012] The anaerobic bacteria spray solution contains anaerobic bacteria, lecithin and water;

[0013] The polylactic acid adhesive solution comprises polylactic acid, lecithin and ethanol.

[0014] In some possible implementations, in the anaerobic bacteria spray solution, the mass ratio of the anaerobic bacteria, the lecithin, and the water is 0.23:(2-3):(1-3).

[0015] In some possible implementations, in the polylactic acid adhesive, the mass ratio of the polylactic acid, the lecithin and the ethanol is (30-50):(5-10):1.

[0016] In some possible implementations, the average molecular weight of the polylactic acid is 800-1000.

[0017] In some possible implementations, the step of loading the polylactic acid binder on the surface of the molecular sieve includes:

[0018] The molecular sieve is immersed in the polylactic acid adhesive solution, filtered and dried to a semi-solidified state.

[0019] In some possible implementations, the preparation of the polylactic acid adhesive solution includes the following steps:

[0020] Under the condition of stirring speed of 30 rpm to 80 rpm, after adding lecithin to ethanol, polylactic acid powder is added more than 10 times, and stirring is continued for 10 minutes to 15 minutes to obtain the polylactic acid adhesive solution.

[0021] In some possible implementations, the preparation of the anaerobic bacteria spray solution includes the following steps:

[0022] Under the condition that the stirring speed is 50 rpm to 100 rpm, after adding lecithin to water, anaerobic bacteria are added, and stirring is continued for 10 min to 15 min to obtain the anaerobic bacteria spray liquid.

[0023] In some possible implementations, the first filtration treatment includes at least one of stone sand filtration, activated carbon filtration, PP cotton filtration, ultrafiltration membrane filtration, and reverse osmosis filtration.

[0024] In some possible implementations, the second filtration treatment includes screen filtration and at least one of ion exchange resin filtration and activated carbon filtration.

[0025] In a second aspect, the present invention provides an application of the perchlorate wastewater purification method provided by the present invention in the field of perchlorate wastewater treatment. DETAILED DESCRIPTION

[0026] In order to make the purpose, technical scheme and advantages of the present invention clearer, the present invention is described and illustrated in conjunction with the embodiments below. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention. Based on the embodiments provided by the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work belong to the scope of protection of the present invention.

[0027] Obviously, the following descriptions are only some examples or embodiments of the present invention, and for those of ordinary skill in the art, the present invention can also be applied to other similar scenarios without creative work. In addition, it can also be understood that although the efforts made in such a development process may be complex and lengthy, for those of ordinary skill in the art related to the contents disclosed in the present invention, some changes in design, manufacturing or production based on the technical contents disclosed in the present invention are just conventional technical means, and should not be understood as the contents disclosed in the present invention being insufficient.

[0028] However, unnecessary detailed descriptions may be omitted. For example, detailed descriptions of well-known matters and repeated descriptions of substantially the same structures may be omitted. This is to avoid the following description from becoming unnecessarily lengthy and to facilitate understanding by those skilled in the art. In addition, the following description is provided for those skilled in the art to fully understand the present invention and is not intended to limit the subject matter described in the claims.

[0029] If not otherwise specified, all embodiments and optional embodiments of the present invention may be combined with each other to form a new technical solution, and all technical features and optional technical features of the present invention may be combined with each other to form a new technical solution.

[0030] The following is a detailed description of a method for purifying perchlorate wastewater and its application according to an embodiment of the present invention.

[0031] The term "content" refers to the mass fraction.

[0032] A first aspect of an embodiment of the present invention provides a method for purifying perchlorate wastewater, comprising the following steps:

[0033] S10. The perchlorate wastewater is subjected to a first filtration treatment, an anaerobic bacteria treatment, and a second filtration treatment to obtain purified wastewater;

[0034] In the anaerobic bacteria treatment, anaerobic bacteria molecular sieve is used to carry out anaerobically treatment of perchlorate wastewater.

[0035] The method for purifying perchlorate wastewater provided in the embodiment of the present invention comprises the following steps: firstly filtering to remove solid particles, heavy metal ions and part of perchlorate in the perchlorate wastewater, reducing the salt content so as not to affect the activity of anaerobic bacteria; and then the anaerobic bacteria treatment decomposes the perchlorate to obtain chloride ions, which are then recycled after absorbing the chloride salts through the second filtering treatment. The method is widely applicable to perchlorate wastewater in various fields.

[0036] In some embodiments, in the above step S10, the first filtration treatment includes at least one of stone sand filtration, activated carbon filtration, PP cotton filtration, ultrafiltration membrane filtration, and reverse osmosis filtration. In this case, stone sand filtration, activated carbon filtration, PP cotton filtration, ultrafiltration membrane filtration, and reverse osmosis filtration are all conventional filtration technologies in the art, and the materials and other filtration conditions can be adjusted as needed, and are not particularly limited in the embodiments of the present invention; in addition, in the first filtration treatment, the selection of various filtrations can be adjusted according to actual conditions, and it is only necessary to make the salt concentration in the water 5g / L to 20g / L.

[0037] In some embodiments, in the above step S10, in the perchlorate wastewater, the perchlorate is at least one of potassium perchlorate, sodium perchlorate, and ammonium perchlorate.

[0038] In some embodiments, in the above step S10, after the perchlorate wastewater is subjected to the first filtration treatment, the salt concentration in the water is 5 g / L to 20 g / L. In the exemplary embodiment, it can be a typical but non-limiting concentration such as 5 g / L, 15 g / L, 20 g / L, or a range between any two concentrations.

[0039] In some embodiments, in the above step S10, the anaerobic bacteria is perchlorate-reducing bacteria QD19-16.

[0040] In some embodiments, in the above step S10, the preparation of the anaerobic molecular sieve comprises the following steps:

[0041] S101. After the polylactic acid binder is loaded on the surface of the molecular sieve, the anaerobic bacteria spray liquid is sprayed, and dried and solidified to obtain an anaerobic molecular sieve;

[0042] The anaerobic spray solution contains anaerobic bacteria, lecithin and water;

[0043] The polylactic acid adhesive solution contains polylactic acid, lecithin and ethanol.

[0044] In the preparation of the above anaerobic molecular sieve, the polylactic acid adhesive liquid is first loaded on the molecular sieve, and then the anaerobic spray liquid is sprayed to make the anaerobic bacteria effectively adhere and fix on the surface of the molecular sieve. Polylactic acid adheres to the anaerobic bacteria, lecithin provides energy for the anaerobic bacteria, maintains the growth and activity of the anaerobic bacteria, and water and ethanol are used as solvents to evenly disperse the anaerobic bacteria and lecithin, polylactic acid and lecithin.

[0045] In some embodiments, in the above step S10, the mass ratio of the polylactic acid adhesive liquid, the anaerobic bacteria spray liquid and the molecular sieve is (50-80): (20-30): 1. In the exemplary embodiment, it can be a typical but non-limiting mass ratio such as 70:25: 1, 50:20: 1, 75:28: 1, 80:30: 1, or a range between any two mass ratios. In this case, the polylactic acid adhesive liquid and the anaerobic bacteria spray liquid can be fully filled on the mesoporous surface of the molecular sieve to form an anaerobic bacteria molecular sieve saturated with bacteria.

[0046] In some embodiments, in the above step S101, in the polylactic acid adhesive solution, the mass ratio of polylactic acid, lecithin and ethanol is (30-50): (5-10): 1, and in the exemplary embodiment, it can be a typical but non-limiting mass ratio such as 30:5:1, 40:8:1, 30:10:1, 50:10:1, or a range between any two mass ratios. In this case, the viscosity of the polylactic acid adhesive solution is moderate and is suitable for loading on the molecular sieve.

[0047] In some embodiments, the average molecular weight of the polylactic acid is 800-1000.

[0048] In some embodiments, in the above step S101, the preparation of the polylactic acid adhesive solution includes the following steps:

[0049] Under the condition of stirring speed of 30 rpm to 80 rpm, after adding lecithin to ethanol, polylactic acid powder is added more than 10 times, and stirring is continued for 10 minutes to 15 minutes to obtain a polylactic acid adhesive solution.

[0050] In some embodiments, in the above step S101, the step of loading the polylactic acid binder on the surface of the molecular sieve includes:

[0051] S1000. Immerse the molecular sieve in the polylactic acid adhesive solution, filter and dry to a semi-solidified state.

[0052] In some embodiments, in the above step S1010, the step of immersing the molecular sieve in the polylactic acid bonding solution includes:

[0053] Under the condition of a stirring speed of 10 rpm to 20 rpm, the molecular sieve is dispersed in the polylactic acid binder solution, and the stirring is continued for 2 min to 10 min to obtain a suspension.

[0054] In some specific embodiments, in the above step S1010, the filtration includes the following steps: filtering the suspension with a sieve of 80-100 mesh to obtain a filter residue. In this case, the molecular sieve with a smaller particle size and no effective load and the excess polylactic acid binder are removed by filtration.

[0055] In some specific embodiments, in the above step S1010, the drying temperature is 20°C to 30°C. In this case, the drying time of the filter residue can be effectively controlled so that it is dried to a semi-solidified state. It should be noted that the drying time depends on the actual amount of molecular sieve and polylactic acid binder, and is not particularly limited in the embodiments of the present invention, as long as it can be dried to a semi-solidified state; the drying method is conventional in the art, but as an example, it can be air-dried, naturally dried, etc.

[0056] In some embodiments, in the above step S101, the average particle size of the molecular sieve is 170 μm to 250 μm, and in an exemplary embodiment, it can be a typical but non-limiting average particle size such as 200 μm or a range between any two average particle sizes. In this case, the molecular sieve contains abundant mesopores and can accommodate more anaerobic bacteria.

[0057] In some embodiments, in the above step S101, the molecular sieve is a mesoporous molecular sieve. It should be noted that the pore size and material of the mesoporous molecular sieve can be selected as needed, and are not particularly limited in the present invention, but as an example, the average pore size of the mesoporous molecular sieve is 30nm to 50nm, and the material is SBA-15, MCM-41, etc.

[0058] In some embodiments, in the above step S101, the preparation of the anaerobic bacteria spray solution includes the following steps:

[0059] S1011. Under the condition of a stirring speed of 50 rpm to 100 rpm, add lecithin to water, then add anaerobic bacteria, and continue stirring for 10 min to 15 min to obtain an anaerobic bacteria spray solution.

[0060] In some embodiments, in the above step S1011, the mass ratio of anaerobic bacteria, lecithin and water in the anaerobic bacteria spraying liquid is 0.23:(2-3):(1-3), and in the exemplary examples, it can be a typical but non-limiting mass ratio such as 0.23:2:1, 0.23:3:2, 0.23:2:3, or a range between any two mass ratios. In this case, lecithin provides all the nutrients for the anaerobic bacteria to maintain growth and biological activity.

[0061] In some embodiments, in the above step S101, the drying and curing temperature is 15°C to 35°C. In an exemplary embodiment, it can be a typical but non-limiting temperature such as 15°C, 20°C, 30°C, or a range between any two temperatures.

[0062] In some embodiments, in the above step S10, the anaerobic treatment includes the steps of:

[0063] S102. Add anaerobic molecular sieve under the condition of stirring speed of 10rpm to 30rpm, and continue stirring for 24h to 48h.

[0064] In some embodiments, in the above step S102, the amount of anaerobic bacteria molecular sieve added is 100g / L to 200g / L. In the exemplary embodiment, it can be a typical but non-limiting amount such as 100g / L, 150g / L, 200g / L, or a range between any two amounts. It should be noted that the amount of anaerobic bacteria molecular sieve added can also be changed according to the actual content of perchlorate in the wastewater. The amount added in the embodiment of the present invention is only set for the salt concentration in the wastewater of 5g / L to 20g / L.

[0065] In some embodiments, in the above step S10, the second filtration treatment includes mesh filtration, and also includes at least one of ion exchange resin filtration and activated carbon filtration. In this case, the mesh filtration blocks the anaerobic molecular sieve from entering the next process to avoid material contamination, and the ion exchange resin and activated carbon adsorb chloride ions obtained by anaerobic decomposition in the water, as well as undecomposed perchlorate, chlorate, and chlorite. It should be noted that the material of the ion exchange resin used to adsorb perchlorate is conventional in the art, and those skilled in the art only need to select it according to their needs. It is not particularly limited in the present invention, but as an example, it can be a styrene-based ion exchange resin, etc.

[0066] A second aspect of the embodiments of the present invention provides an application of the perchlorate wastewater purification method provided by the embodiments of the present invention in the field of perchlorate wastewater treatment.

[0067] The following is further described in conjunction with specific embodiments.

[0068] Example 1

[0069] Example 1 provides a method for purifying perchlorate wastewater, the steps of which are as follows:

[0070] (1) After the perchlorate wastewater is filtered through stone sand, activated carbon, PP cotton, ultrafiltration membrane and reverse osmosis, the salt concentration of the wastewater obtained is 15g / L.

[0071] (2) Treat the wastewater after filtering in step (1) with anaerobic bacteria:

[0072] 1) The anaerobic bacteria selected were perchlorate-reducing bacteria QD19-16.

[0073] 2) Preparation of polylactic acid adhesive:

[0074] ① Select polylactic acid with an average molecular weight of 900, and the mass ratio of polylactic acid, lecithin and ethanol is 40:8:1.

[0075] ② Under the condition of stirring speed of 40 rpm, after adding lecithin to ethanol, add polylactic acid powder in 10 times, continue stirring for 12 minutes, and obtain polylactic acid adhesive solution.

[0076] 3) Preparation of anaerobic spray solution:

[0077] ① Select the mass ratio of anaerobic bacteria, lecithin and water as 0.23:3:2.

[0078] ② Under the condition of a stirring speed of 50 rpm, after adding lecithin to the water, add anaerobic bacteria and continue stirring for 10 minutes to obtain an anaerobic bacteria spray solution.

[0079] 4) Preparation of anaerobic molecular sieve:

[0080] ① Select SBA-15 molecular sieve with an average particle size of 200 μm and an average pore size of 40 nm, and the mass ratio of polylactic acid adhesive liquid, anaerobic bacteria spray liquid and molecular sieve is 70:25:1.

[0081] ② Immerse the molecular sieve in the polylactic acid adhesive solution, filter it through a 90-mesh sieve, and dry it at 20°C to a semi-cured state.

[0082] ③ Spray the anaerobic bacteria spray liquid on the semi-cured polylactic acid adhesive liquid, dry and solidify it at 20°C to obtain the anaerobic bacteria molecular sieve.

[0083] 5) Under the condition of stirring speed of 10 rpm, add 150 g / L anaerobic molecular sieve to the wastewater filtered in step (1), and continue stirring for 36 hours.

[0084] (3) After the wastewater after anaerobic treatment is filtered through a filter, it is filtered through an ion exchange resin and activated carbon to obtain purified wastewater.

[0085] Example 2

[0086] Example 2 provides a method for purifying perchlorate wastewater, the steps of which are substantially the same as those of Example 1, except that:

[0087] In (1), the salt concentration of the wastewater after filtration is 5 g / L.

[0088] In (2) 2), the mass ratio of polylactic acid, polylactic acid, lecithin and ethanol is 50:10:1;

[0089] 3), the mass ratio of anaerobic bacteria, lecithin and water is 0.23:2:1;

[0090] 4), the mass ratio of polylactic acid adhesive liquid, anaerobic bacteria spray liquid and molecular sieve is 50:20:1;

[0091] 5), the amount of anaerobic molecular sieve added is 100 g / L.

[0092] Example 3

[0093] Example 3 provides a method for purifying perchlorate wastewater, the steps of which are substantially the same as those of Example 1, except that:

[0094] In (1), the salt concentration of the wastewater after filtration is 20 g / L.

[0095] In 2) of (2), the mass ratio of polylactic acid, polylactic acid, lecithin and ethanol is 30:10:1;

[0096] 3), the mass ratio of anaerobic bacteria, lecithin and water is 0.23:2:3;

[0097] 4), the mass ratio of polylactic acid adhesive liquid, anaerobic bacteria spray liquid and molecular sieve is 80:30:1;

[0098] 5), the amount of anaerobic molecular sieve added is 200 g / L.

[0099] Example 4

[0100] Example 4 provides a method for purifying perchlorate wastewater, the steps of which are substantially the same as those of Example 1, except that:

[0101] In (1), the salt concentration of the wastewater after filtration is 20 g / L.

[0102] In (2) 2), the mass ratio of polylactic acid, polylactic acid, lecithin and ethanol is 30:5:1;

[0103] 3), the mass ratio of anaerobic bacteria, lecithin and water is 0.23:3:2.

[0104] 4), the mass ratio of polylactic acid adhesive liquid, anaerobic bacteria spray liquid and molecular sieve is 75:28:1;

[0105] 5), the amount of anaerobic molecular sieve added is 200 g / L.

[0106] Comparative Example 1

[0107] Comparative Example 1 provides a method for purifying perchlorate wastewater, the steps of which are as follows:

[0108] (1) After the perchlorate wastewater is filtered through stone sand, activated carbon, PP cotton, ultrafiltration membrane and reverse osmosis, the salt concentration of the wastewater obtained is 15g / L.

[0109] (2) The wastewater is purified by ion exchange resin filtration and activated carbon filtration.

[0110] In order to verify the progressiveness of the method for purifying perchlorate wastewater according to the embodiment of the present invention, the content of perchlorate in the wastewater after purification treatment according to the embodiment and the comparative example was detected by spectrophotometry. The results are shown in Table 1 below.

[0111] Table 1

[0112] <![CDATA[C1(g / L)]]> <![CDATA[C2(mg / L)]]> Example 1 15 0.19 Example 2 5 0.13 Example 3 20 0.27 Example 4 20 0.35 Comparative Example 1 15 2.01

[0113] Note: In Table 1 above, C1 represents "the salt concentration of the wastewater obtained after the perchlorate wastewater is filtered through stone sand, activated carbon, PP cotton, ultrafiltration membrane and reverse osmosis"; C2 represents the concentration of perchlorate in the wastewater after purification.

[0114] From Table 1 above, we can get:

[0115] (1) The method for purifying perchlorate wastewater provided in the embodiment of the present invention comprises the following steps: firstly filtering to remove solid particles, heavy metal ions and part of perchlorate in the perchlorate wastewater, reducing the salt content so as not to affect the activity of anaerobic bacteria; and then the anaerobic bacteria treatment decomposes the perchlorate to obtain chloride ions, which are then recycled after absorbing the chloride salts through the second filtering treatment. The method is widely applicable to perchlorate wastewater in various fields.

[0116] (2) According to the method for purifying perchlorate wastewater provided in the embodiment of the present invention, the concentration of perchlorate in the treated wastewater is below 0.35 mg / L.

[0117] It should be noted that the present invention is not limited to the above-mentioned embodiments. The above-mentioned embodiments are only examples, and the embodiments having the same structure as the technical idea and exerting the same effect within the scope of the technical solution of the present invention are all included in the technical scope of the present invention. In addition, without departing from the scope of the main purpose of the present invention, various modifications that can be thought of by those skilled in the art to the embodiments and other methods of combining some of the constituent elements in the embodiments are also included in the scope of the present invention.

Claims

1. A method for purifying perchlorate wastewater, characterized in that: The steps include: The perchlorate wastewater is subjected to a first filtration treatment, an anaerobic bacteria treatment and a second filtration treatment to obtain purified wastewater; In the anaerobic bacteria treatment, anaerobic bacteria molecular sieve is used to perform anaerobically treatment on the perchlorate wastewater.

2. The method for purifying perchlorate wastewater according to claim 1, characterized in that: The preparation of the anaerobic molecular sieve comprises the following steps: After loading the polylactic acid adhesive liquid on the surface of the molecular sieve, spraying the anaerobic bacteria spray liquid, and drying and solidifying, the anaerobic bacteria molecular sieve is obtained; The anaerobic bacteria spray solution contains anaerobic bacteria, lecithin and water; The polylactic acid adhesive solution comprises polylactic acid, lecithin and ethanol.

3. The method for purifying perchlorate wastewater according to claim 2, characterized in that: In the anaerobic bacteria spray liquid, the mass ratio of the anaerobic bacteria, the lecithin and the water is 0.23:2-3:1-3.

4. The method for purifying perchlorate wastewater according to claim 2 or 3, characterized in that: In the polylactic acid adhesive solution, the mass ratio of the polylactic acid, the lecithin and the ethanol is 30-50:5-10:

1.

5. The method for purifying perchlorate wastewater according to any one of claims 2 to 4, characterized in that: The average molecular weight of the polylactic acid is 800-1000.

6. The method for purifying perchlorate wastewater according to claim 5, characterized in that: The step of loading the polylactic acid binder on the surface of the molecular sieve comprises: The molecular sieve is immersed in the polylactic acid adhesive solution, filtered and dried to a semi-solidified state.

7. The method for purifying perchlorate wastewater according to any one of claims 2 to 6, characterized in that: The preparation of the polylactic acid adhesive solution comprises the following steps: Under the condition of stirring speed of 30 rpm to 80 rpm, after adding lecithin to ethanol, polylactic acid powder is added more than 10 times, and stirring is continued for 10 minutes to 15 minutes to obtain the polylactic acid adhesive solution.

8. The method for purifying perchlorate wastewater according to any one of claims 2 to 7, characterized in that: The preparation of the anaerobic bacteria spray liquid comprises the following steps: Under the condition that the stirring speed is 50 rpm to 100 rpm, after adding lecithin to water, anaerobic bacteria are added, and stirring is continued for 10 min to 15 min to obtain the anaerobic bacteria spray liquid.

9. The method for purifying perchlorate wastewater according to claim 1, characterized in that: The first filtration treatment includes at least one of stone sand filtration, activated carbon filtration, PP cotton filtration, ultrafiltration membrane filtration, and reverse osmosis filtration; And / or, the second filtration treatment includes screen filtration and at least one of ion exchange resin filtration and activated carbon filtration.

10. Use of the method for purifying perchlorate wastewater according to any one of claims 1 to 9 in the field of perchlorate wastewater treatment.