Method for removing antibiotics in water based on Fenton-like biological aerated filter of hydrogen peroxide produced by lactobacillus

Abstract

The invention discloses a method for removing antibiotics in water by a Fenton-like biological aerated filter based on hydrogen peroxide produced by lactobacillus. According to the method, a carrier loaded with Schwertmannite is used as a filler and is filled into the biological aerated filter to serve as a filter material, microbial lactobacillus capable of automatically producing hydrogen peroxide is colonized, and in the wastewater treatment process of the biological aerated filter, the lactobacillus on the filter material feeds carbohydrates in the wastewater to grow, so that the content of the carbohydrates in the wastewater is reduced; and hydrogen peroxide is generated and a catalytic material (Schwertmannite) on the filter material is driven to be subjected to a Fenton-like reaction, so that organic pollutant antibiotics which are difficult to biodegrade in wastewater are removed, and the method has the characteristics of durability and stability and can be practically applied on a large scale.

Description

A method for removing antibiotics from water using a Fenton-like aeration biological filter based on hydrogen peroxide produced by lactobacillus. Technical Field

[0001] This invention belongs to the field of environmental engineering and water treatment technology, and more specifically, relates to a method for removing antibiotics from water using a Fenton-like aeration biological filter based on hydrogen peroxide produced by lactobacillus. Background Technology

[0002] A biologically aerated filter (BAF) is a highly efficient and compact new type of biofilm wastewater treatment facility with dual functions of biodegradation and physical filtration. Types include aerated biological filter beds and biological filter dams. Its core principle involves using packing material (such as volcanic rock (VR) or biochar (BC)) as a carrier, inoculating it with conventional microorganisms from activated sludge, and colonizing the packing material (i.e., a film-like microbial layer grows on the packing material, commonly known as "biofilm"). The aeration system provides oxygen, promoting the degradation of organic matter in the wastewater by the microorganisms. The packing layer filters suspended solids (SS) and also removes chemical oxygen demand (COD). cr It has multiple functions including five-day biochemical oxygen demand (BOD5), nitrification, denitrification, and phosphorus removal. The aerated biological filter is a new wastewater treatment process that integrates biological oxidation and suspended solids retention, and it has great development potential.

[0003] However, for some novel pollutants with strong biotoxicity, such as antibiotics, in wastewater, the removal rate of aerated biological filters is not high. For example, when the concentration of antibiotics in wastewater exceeds 50 μg / L, the microbial denitrification process begins to be inhibited, and the richness and diversity of the microbial community are significantly reduced, leading to a decrease in conventional COD. cr The removal of BOD5, as well as processes such as nitrification, denitrification, and phosphorus removal, are also inhibited to some extent. This is the current technical dilemma of aerated biological filters in treating new pollutants containing recalcitrant biodegradable substances.

[0004] Advanced oxidation processes are a relatively effective method for degrading new pollutants that are difficult to biodegrade, including antibiotics. The most classic method is the traditional homogeneous chemical Fenton process, which has a fast catalytic reaction rate. However, it requires a large amount of Fenton's reagent (H2O2 + FeSO4) and produces a large amount of iron sludge [mainly Fe(OH)3] that needs further treatment. To replace the direct use of Fe, new catalytic materials are being developed using iron-containing minerals or some transition metals (such as Cu, Ag, Mn), as well as through methods such as loading and doping. 2+Research on heterogeneous Fenton-like techniques has received particular attention. However, both conventional homogeneous Fenton and heterogeneous (Fenton-like) methods often require the use of exogenous H2O2. H2O2 is a strong oxidant, a controlled hazardous chemical, and poses significant safety hazards during storage, transportation, and use, while also incurring high costs.

[0005] Some microorganisms, such as Lactobacillus and Aspergillus niger, can secrete H2O2 during their growth. Therefore, developing an aerated biofilter with a biological Fenton degradation effect by utilizing H2O2-producing microorganisms and applying it to remove recalcitrant organic pollutants from water bodies, especially new organic pollutants, is of great practical significance for protecting the ecological environment. Summary of the Invention

[0006] This invention addresses the technical challenge of low treatment efficiency in existing aerated biological filters when treating wastewater containing antibiotics and other recalcitrant wastewater. It provides a filter media for an aerated biological filter by utilizing microorganisms that can generate H2O2.

[0007] Another object of the present invention is to provide an aerated biofilter filled with the filter media.

[0008] Another objective of this invention is to provide a method for removing antibiotics from water using a Fenton-like aeration biofilter based on hydrogen peroxide produced by lactobacillus.

[0009] The objective of this invention can be achieved through the following technical solutions:

[0010] A filter media for an aerated biological filter, wherein the filter media is a carrier with a surface loaded with Schiele minerals, and the surface of the carrier is colonized with microorganisms capable of producing hydrogen peroxide, wherein the carrier is selected from volcanic rock or biochar, and the particle size is 0.5-3.5 cm.

[0011] Preferably, the microorganism that produces the hydrogen peroxide is selected from Lactobacillus acidophilus, which has the accession number CGMCC NO.22886.

[0012] Preferably, the surface-loaded Schärgren mineral carrier is prepared by the following method: adding H2O2 to an aqueous solution of FeSO4 to generate Schärgren mineral in a reaction system, and adding the acid-modified carrier to load the generated Schärgren mineral onto the carrier, thereby preparing the Schärgren mineral-loaded carrier.

[0013] The method for preparing the filter media of the aerated biological filter includes the following steps:

[0014] (1) Acid modification of the carrier: The carrier is added to 2 M H2SO4 aqueous solution at a mass ratio of 1:1.5-3 and soaked for 2-3 days for acid modification. After draining, it is ready for use.

[0015] (2) Loading Schiele minerals: In the reaction system in which H2O2 is added to an aqueous solution of FeSO4 to generate Schiele minerals by chemical method, an acid-modified support is added so that the generated Schiele minerals are loaded on the support, and a support for loading Schiele minerals is prepared.

[0016] (3) Microbial colonization: The carrier loaded with the above-prepared Shirley minerals is filled into the aerated biological filter. The microorganisms that can generate H2O2 are colonized on the filter media by the conventional aerated biological filter biofilm method, and the filter media of the aerated biological filter is obtained.

[0017] Preferably, the method for loading Scherstein minerals is as follows: FeSO4·7H2O is dissolved in H2O at a mass ratio of 1:(10-20), and volcanic rock or biochar is added as a carrier. The mass ratio of the carrier to FeSO4·7H2O is (4-6):1. Under the condition of controlling the pH of the mixed system at 2-5, 30% H2O2 is added, and the total amount added is 1 / 3 of the mass of FeSO4·7H2O. The mixture is divided into 6 equal parts and added to the preparation system of loaded Scherstein minerals in 6 portions over 3 hours, with 1 portion added each time. Aeration is continuously carried out during the preparation process to prepare the carrier for loaded Scherstein minerals.

[0018] Preferably, water, 5000 mg / L glucose, 500 mg / L ammonium chloride, and 200 mg / L dipotassium hydrogen phosphate trihydrate are added to the aerated biofilter. Microbial inoculum containing self-produced hydrogen peroxide is inoculated into the biofilter at 5% of its total effective volume. Aeration is continued for 3 days, with the pH of the aqueous solution monitored in real time. The pH is maintained at 5.8-6.2 using 2 M NaOH solution. One-third of the aqueous solution in the aerobic aerated filter is replaced with the previously prepared aqueous solution containing 5000 mg / L glucose, 500 mg / L ammonium chloride, and 200 mg / L dipotassium hydrogen phosphate trihydrate. Aeration is continued for another 3 days. This process is repeated 3-5 times to allow the microorganisms to colonize the filter media, resulting in a biofilm of self-produced hydrogen peroxide microorganisms growing on the filter media surface, commonly known as "biofilm formation."

[0019] Further preferred Lactobacillus acidophilus NAU19 bacterial suspension with accession number CGMCC NO.22886 was prepared by expanding NAU19 in MRS (de Man, Rogosa and Sharpe medium) liquid medium, and its absorbance (OD) was measured at a wavelength of 600 nm. 600It can indirectly characterize the bacterial content in bacterial culture. When the value is between 0.6 and 0.8, it can be used as a bacterial strain.

[0020] An aerated biological filter, wherein the aerated biological filter is filled with the filter media.

[0021] A water treatment system comprising the aforementioned aerated biological filter.

[0022] The application of the filter media, the aerated biological filter, and the water treatment system described in this invention in the treatment of wastewater is preferred in the treatment of wastewater containing recalcitrant organic pollutants.

[0023] Preferred recalcitrant organic pollutants are antibiotics.

[0024] More preferably, the antibiotic is sulfadiazine (SD).

[0025] A method for removing antibiotics from water using a Fenton-like aerated biofilter based on lactobacillus producing its own hydrogen peroxide is disclosed. The aerated biofilter is used to treat wastewater. During the wastewater treatment process, the microorganisms on the filter media that produce their own hydrogen peroxide consume carbohydrates in the wastewater and grow, while producing hydrogen peroxide and driving the Scheringer minerals on the filter media to undergo a Fenton-like reaction, thereby removing antibiotic pollutants from the wastewater.

[0026] This invention utilizes acid-modified biochar, volcanic rock, and other materials to support amorphous ferric hydroxide minerals—Schwertmannite (abbreviated Sch, also known as "Sch mineral"), whose chemical composition can be represented as Fe8O8(OH). 8-2x (SO4) x (1≦x≦1.75), rich in Fe(III)], is used as the filter media of an aerated biological filter. Lactobacillus, which can produce endogenous H2O2, colonizes the filter media. Under aeration and oxygen supply conditions, the H2O2 produced by the lactobacillus reacts with the Fe(III) in the Scheres mineral loaded on the filter media to undergo a Fenton-like advanced oxidation degradation reaction, breaking through the dilemma of low efficiency in treating recalcitrant organic pollutants by conventional aerated biological filters.

[0027] Compared with the prior art, the advantages of this invention are as follows:

[0028] (1) This invention provides a method for removing antibiotics from water using a Fenton-like aerated biological filter based on hydrogen peroxide produced by lactobacillus and its application. The core of this method is to add acid-modified biochar, volcanic rock and other materials as carriers to the system in which FeSO4·7H2O is oxidized by H2O2 to generate Schöndorfite, so that the generated Schöndorfite is loaded on the carrier and used as filter media to fill the aerated biological filter. Using the conventional aerated biological filter biofilm method, lactobacillus that can generate H2O2 is colonized on the filter media to treat recalcitrant organic pollutants.

[0029] The mechanism of its degradation of organic pollutants is mainly as follows: LA in the biofilm colonized on the filter media continuously produces H2O2. On the Sch surface loaded on the filter media, H2O2 reacts with Fe(III) in Sch to undergo a Fenton-like catalytic degradation reaction, reducing Fe(III) to Fe(II). Then, Fe(II) further reacts with H2O2 to undergo a stronger Fenton-like catalytic degradation reaction of organic pollutants, and is oxidized back to Fe(III), so that the Fenton-like reaction in the aerated biofilter can continue for a long time.

[0030] (2) This invention provides a method for removing antibiotics from water using a Fenton-like aerated biofilter based on hydrogen peroxide produced by lactobacillus and its application. The H2O2 required for the Fenton-like reaction comes from the inside of the aerated biofilter, specifically from the lactobacillus colonizing the filter media of the aerated biofilter. The lactobacillus consumes and digests carbohydrates in the water and uses O2 to synthesize H2O2 in its cells, thus avoiding the risks associated with using exogenous H2O2 chemical reagents.

[0031] (3) This invention provides a method for removing antibiotics from water using a Fenton-like aerated biological filter based on hydrogen peroxide produced by lactobacillus, and its application. This method effectively avoids the need for filter media replacement or regeneration in conventional aerated biological filters. In the process of treating wastewater containing recalcitrant organic pollutants using conventional aerated biological filters, the removal efficiency is low because the filter media is colonized by ordinary microorganisms. This leads to a gradual increase in the adsorption capacity of the filter media for recalcitrant organic pollutants in the wastewater, eventually reaching saturation. This causes toxic side effects on the activity of the biofilm on the filter media, reducing the effectiveness of the aerated biological filter in removing COD from the wastewater. cr The removal of BOD5, as well as functions such as nitrification, denitrification, and phosphorus removal, decline. Therefore, once the filter media reaches saturation from adsorbing recalcitrant organic pollutants, it needs to be replaced or regenerated. Replacement will undoubtedly increase costs, and whether in-situ regeneration using organic solvent elution (which generates difficult-to-treat organic waste liquid) or ex-situ regeneration using high-temperature heating at 750-950℃ (which generates waste gas), both are prone to causing secondary pollution.

[0032] (4) This invention provides a new process for treating antibiotics, which are difficult-to-degrade organic pollutants in water, by using microorganisms that can generate endogenous H2O2 to drive the Scheres mineral loaded on the filter media to undergo a Fenton-like catalytic degradation reaction. It has the characteristics of long-lasting stability and can be applied on a large scale. Attached Figure Description

[0033] Figure 1. Scanning electron microscopy image of Lactobacillus LA;

[0034] Figure 2. LA growth (OD) 600 ) and the dynamic changes in the amount of H2O2 produced;

[0035] Figure 3. Effects of Sch@VR, Sch@BC, and SD treatments before and after colonization of LA;

[0036] Figure 4. Effect of hydraulic retention time LA / Sch@BC on SD treatment;

[0037] Figure 5. Effect of hydraulic residence time on the effect of LA / Sch@VR on SD treatment.

[0038] Certificate of Preservation of Biological Materials

[0039] NAU19, classified as Lactobacillus acidophilus, is deposited at the China General Microbiological Culture Collection Center (CGMCC) on July 13, 2021, with accession number CGMCC NO.22886. The deposit address is Institute of Microbiology, Chinese Academy of Sciences, No. 3, Courtyard 1, Beichen West Road, Chaoyang District, Beijing. Detailed Implementation

[0040] The present invention will be further described below with reference to specific embodiments.

[0041] Example 1

[0042] This embodiment provides a scanning electron microscope (SEM) imaging example of the morphological characteristics of a strain of Lactobacillus.

[0043] Lactobacillus acidophilus NAU19 (LA) with accession number CGMCC NO.22886 was cultured in pure medium on MRS for 3 days. After a series of standardized operations including sampling, fixation, dehydration, drying, coating and sticking, the morphological characteristics of LA were observed by SEM. LA is a rod-shaped bacterium, as shown in Figure 1.

[0044] Example 2

[0045] This embodiment provides an observation example of the growth of a strain of lactobacillus and the dynamic changes in its H2O2 production.

[0046] Lactobacillus acidophilus NAU19 (LA) with accession number CGMCC NO.22886 was cultured in pure medium on MRS for 3 days. This culture was then used as the inoculum for further propagation in glucose solution. The specific method was as follows: The propagation container (inner diameter 10 cm, effective liquid level 30 cm, with an aeration device installed at the bottom, aeration intensity 0.8 m) was used. 3 / m 2 Add water, 5000 mg / L glucose, 500 mg / L ammonium chloride, and 200 mg / L dipotassium hydrogen phosphate trihydrate to a culture medium (at room temperature 28℃). Inoculate the medium with LA bacterial solution at 5% of the total effective volume of the culture container, and continue aeration for 24 h. Observe its growth (OD). 600 The dynamic changes in the amount of H2O2 produced are shown in Figure 2.

[0047] Example 3

[0048] This embodiment provides a preparation example of generating Schiele minerals loaded on volcanic rock (VR) using a chemical method.

[0049] In a 50 L reactor equipped with an aeration device at the bottom, 30 L of tap water, 2 kg of FeSO4·7H2O, and 10 kg of volcanic rock with a particle size of 1-2 cm were added (previously washed with water to remove impurities such as mud and sand, and soaked in 2 M H2SO4 solution for 2-3 days for acid modification). The pH was adjusted to approximately 2.7. Every 30 minutes, 111 g of 30% (w / w) H2O2 was added, and aeration and stirring were continued at an aeration intensity of 1 m / s. 3 / m 2 During the reaction, the pH value of the system was monitored. Aeration was maintained between 2.5 and 3.0 by adding 2 M NaOH solution. A total of 666 g of H₂O₂ was added, and aeration was continued for 24 hours before stopping. The waste liquid in the reactor was drained, and the volcanic rock was washed with tap water until the pH of the washing liquid was 6-7. The volcanic rock was then removed from the reactor, dried, and stored for later use. At this point, the volcanic rock was loaded with Sch@VR minerals.

[0050] Example 4

[0051] This embodiment provides a preparation example of generating Schiele minerals loaded on biogenic carbon (BC) using a chemical method.

[0052] In a 50 L reactor equipped with an aeration device at the bottom, 30 L of tap water, 2 kg of FeSO4·7H2O, and 10 kg of biochar made from bamboo with a particle size of 2-3 cm were added. The mixture was then soaked in a 2 M H2SO4 solution for 2-3 days for acid modification, adjusting the pH of the aqueous solution in the reactor to approximately 2.7. Every 30 minutes, 111 g of 30% (w / w) H2O2 was added, and continuous aeration and stirring were maintained at an aeration intensity of 1 m / s. 3 / m 2 During aeration, the pH of the system was monitored. A 2 M NaOH solution was added to maintain the pH between 2.5 and 3.0. A total of 666 g of H₂O₂ was added, and aeration was continued for 24 hours before stopping. The waste liquid in the reactor was drained, and the biochar was washed with tap water until the pH of the washing liquid was 6-7. The biochar was then removed from the reactor, dried, and stored for later use. At this point, the biochar was loaded with Sch@BC minerals.

[0053] Example 5

[0054] This embodiment provides an example of observing the effects of Sch@VR, Sch@BC, and LA colonization before and after treatment with SD. At room temperature (28°C), approximately 2 kg of Sch@VR material with a particle size of 1-2 cm and approximately 1 kg of Sch@BC material with a particle size of 2-3 cm were added as filter media to several reactors (10 cm inner diameter, 30 cm effective liquid level, and aeration devices installed at the bottom of the reactor). Then, LA bacterial solution prepared in Example 2 was added at 5% of the total effective volume of the reactor. Three reactors—one with added filter media but no LA bacteria, and one without added filter media but with added LA bacterial solution—were used as control treatments. Each reactor was filled with 1000 mg / L glucose, 100 mg / L ammonium chloride, 40 mg / L dipotassium hydrogen phosphate trihydrate, and 2 mg / L sulfadiazine (SD) aqueous solution, resulting in glucose, total nitrogen (TN), and total phosphorus (TP) concentrations of 1000 ppm, 25 ppm, and 5 ppm, respectively, and SD concentration of 2 ppm. Aeration was maintained for 96 h at an aeration intensity of 1.0 m³ / h. 3 / m 2The pH of the water was monitored in real time, and a 2 M NaOH solution was used to maintain the pH at around 6.0. Water samples were collected from the reactor at different times to observe the dynamic changes in SD concentration. After 96 hours of continuous "sedation" (no water intake, continuous aeration), the removal rates of SD in the water were low, at only 4%, 9.5%, and 11%, respectively, when only LA was added without filter media, and when only Sch@VR and Sch@BC filter media were added without LA bacteria. However, when Sch@VR and Sch@BC filter media were added to the reactor and LA bacteria were inoculated, the removal rates of SD in the water were significantly improved, reaching 95.5% and 97%, respectively, as shown in Figure 3.

[0055] Example 6

[0056] This embodiment provides an application example of a biological Fenton aeration biofilter that uses Sch@VR as filter media to colonize Lactobacillus for the treatment of antibiotics in water.

[0057] Two kg of the prepared Sch@VR material (particle size 1-2 cm) was used as filter media and filled into an aerated biological filter (inner diameter 10 cm, effective liquid level 30 cm, filter media filling height 20 cm, aeration device installed at the bottom of the reactor, aeration intensity 0.6-1.0 m). 3 / m 2 In a controlled environment (dissolved oxygen DO 1.5-2.0 mg / L, room temperature 28℃), LA was colonized on Sch@VR using the aforementioned biofilm formation method. Artificially prepared wastewater containing 2 mg / L of antibiotic SD (1000 mg / L glucose, 100 mg / L ammonium chloride, and 40 mg / L dipotassium hydrogen phosphate trihydrate) was treated for 3 consecutive weeks (21 days) with continuous influent inflows of 1, 2, and 3 days. The final removal rates of SD stabilized at approximately 33%, 58%, and 74%, respectively, as shown in Figure 4.

[0058] Example 7

[0059] This embodiment provides another application example of using Sch@BC as filter media to colonize Lactobacillus in a biological Fenton-type aerated biofilter for treating antibiotics in water. 1 kg of Sch@BC material (particle size 2-3 cm) is used as filter media and filled into an aerated biofilter (inner diameter 10 cm, effective liquid level 30 cm, filter media filling height 20 cm, aeration intensity 0.6-1.0 m). 3 / m 2In a 28°C environment (dissolved oxygen DO 1.5-2.0 mg / L, room temperature 28°C), LA was colonized on Sch@VR using the aforementioned biofilm method. The wastewater containing 2 mg / L of antibiotic SD (1000 mg / L glucose, 100 mg / L ammonium chloride, and 40 mg / L dipotassium hydrogen phosphate trihydrate) was continuously treated for 3 weeks (21 days) with influent at hydraulic retention times (HRT) of 1 day, 2 days, and 3 days. The final SD removal rates stabilized at approximately 47%, 61%, and 77%, respectively, as shown in Figure 5.

Claims

1. A filter media for an aerated biological filter, characterized in that, The filter media is a carrier with Schiele minerals loaded on its surface, and the surface of the carrier is colonized with microorganisms that can produce hydrogen peroxide. The carrier is selected from volcanic rock or biochar, and the particle size is 0.5-3.5 cm.

2. The filter material according to claim 1, characterized in that, The microorganisms that produce hydrogen peroxide are selected from Lactobacillus acidophilus, which has the accession number CGMCC NO.22886.

3. The filter media of the aerated biological filter according to claim 1, characterized in that, The surface-loaded Schärgren mineral carrier is prepared by the following method: in the reaction system of adding H2O2 to FeSO4 aqueous solution to generate Schärgren mineral, the acid-modified carrier is added, so that the generated Schärgren mineral is loaded on the carrier, thus obtaining the Schärgren mineral-loaded carrier.

4. The method for preparing the filter media of the aerated biological filter according to any one of claims 1-3, characterized in that, The process includes the following steps: (1) Acid modification of the carrier: The carrier is added to a 2 M H2SO4 aqueous solution at a mass ratio of 1:1.5-3 and soaked for 2-3 days for acid modification. After draining, it is ready for use. (2) Loading Schering minerals: In the reaction system in which H2O2 is added to FeSO4 aqueous solution to generate Schering minerals by chemical method, the acid-modified carrier is added so that the generated Schering minerals are loaded on the carrier, and a carrier loaded with Schering minerals is prepared. (3) Microbial colonization: The carrier loaded with Schering minerals prepared above is filled into an aerated biological filter. The microorganisms that can generate H2O2 are colonized on the filter media by the conventional aerated biological filter membrane method, and the filter media of the aerated biological filter is obtained.

5. The preparation method according to claim 4, characterized in that, The method for loading Schiele minerals is as follows: FeSO4·7H2O is dissolved in H2O at a mass ratio of 1:(10-20), and volcanic rock or biochar is added as a carrier. The mass ratio of the carrier to FeSO4·7H2O is (4-6):

1. Under the condition of controlling the pH of the mixed system at 2-5, 30% H2O2 is added, and the total amount added is 1 / 3 of the mass of FeSO4·7H2O. The mixture is divided into 6 equal parts and added to the Schiele mineral loading preparation system in 6 portions over 3 hours, with 1 portion added each time. Aeration is continuously carried out during the preparation process to prepare the carrier for loading Schiele minerals.

6. The preparation method according to claim 4, characterized in that, Add water, 5000 mg / L glucose, 500 mg / L ammonium chloride, and 200 mg / L dipotassium hydrogen phosphate trihydrate to the aerated biofilter. Inoculate the microbial solution containing self-produced hydrogen peroxide as a starter at 5% of the total effective volume of the aerated biofilter and continue aeration for 3 days. Monitor the pH of the aqueous solution in real time and maintain the pH at 5.8-6.2 with 2 M NaOH solution. Replace 1 / 3 of the aqueous solution in the aerobic aerated filter with the aqueous solution containing 5000 mg / L glucose, 500 mg / L ammonium chloride, and 200 mg / L dipotassium hydrogen phosphate trihydrate, and continue aeration for another 3 days. Repeat this process 3-5 times to allow the microorganisms to colonize the filter media. A biofilm of self-produced hydrogen peroxide microorganisms grows on the surface of the filter media, which is commonly known as "biofilm formation".

7. An aerated biological filter, characterized in that, The aerated biological filter is filled with the filter media as described in any one of claims 1-3.

8. A water treatment system, characterized in that, It includes the aerated biofilter as described in claim 7.

9. The application of the filter media according to claims 1-3, the aerated biological filter according to claim 7, and the water treatment system according to claim 8 in the treatment of wastewater, preferably in the treatment of wastewater containing antibiotics that are difficult to biodegrade.

10. A method for removing antibiotics from water using a Fenton-like aeration biological filter based on hydrogen peroxide produced by lactobacillus, characterized in that, When the aerated biological filter according to claim 7 is used to treat wastewater, during the wastewater treatment process, the microorganisms on the filter media that produce hydrogen peroxide consume carbohydrates in the wastewater and grow, while producing hydrogen peroxide and driving the Scheringer minerals on the filter media to undergo a Fenton-like reaction, thereby removing antibiotics from the wastewater.

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