A method for the co-hydrothermal resource utilization of chlorine-containing ammonia nitrogen wastewater and antibiotic bacterial residue.

Abstract

This invention belongs to the field of wastewater and solid waste treatment and resource utilization technology, specifically relating to a hydrothermal resource utilization method for treating chlorinated ammonia nitrogen-containing wastewater and antibiotic bacterial residue. The method includes the following steps: antibiotic bacterial residue and chlorinated ammonia nitrogen-containing wastewater are stirred and mixed evenly, and the pH is adjusted to 0.2–0.6 with an acidic solution; the pretreated mixed bacterial solution is fed into a hydrothermal reactor and subjected to a hydrothermal reaction at 150–200°C, with the pressure controlled at 0.5–1.0 MPa by a pressure stabilization system; after the reaction is completed, the mixture is cooled, depressurized, and discharged; the mixture obtained from the hydrothermal reaction is subjected to solid-liquid separation to obtain a reduced-volume, harmless small-molecule composite liquid and solid residue. This invention synergistically achieves the simultaneous reduction, harmlessness, and resource utilization of high-ammonia nitrogen wastewater and antibiotic bacterial residue during antibiotic production.

Description

Technical Field

[0001] This invention belongs to the field of wastewater and solid waste treatment and resource utilization technology, specifically relating to a hydrothermal resource utilization method for wastewater containing chlorine and ammonia nitrogen and antibiotic bacterial residue. Background Technology

[0002] Antibiotic production may generate large amounts of wastewater and bacterial residue (approximately 150-200 tons of wastewater and 8-10 tons of bacterial residue per ton of antibiotics). During the fermentation process of antibiotic production, many bacteria or fungi utilize nitrogen-containing organic matter (such as amino acids and urea) for metabolism, producing ammonia or amino compounds, thus exhibiting high ammonia nitrogen and low biodegradability. Antibiotic bacterial residue is a solid waste generated during antibiotic production, mainly composed of microbial cells, incompletely fermented raw materials, residual antibiotics, and other metabolic byproducts. It also contains large amounts of organic matter, antibiotic residues, and heavy metals, posing a high environmental risk. If not properly treated and discharged indiscriminately, it may lead to soil and water pollution and the spread of antibiotic resistance, endangering human health and ecological security.

[0003] Current methods for treating antibiotic fermentation broth primarily employ solid-liquid separation: first, the fermentation broth is frozen using refrigeration equipment; then, the solids and liquids are separated by centrifugation or pressure filtration, and subsequently, the wastewater and bacterial residue generated during the production process are treated separately. Wastewater treatment mainly utilizes a combination of technologies: first, a strong oxidant is added to decompose most macromolecular compounds and organic matter into low-toxicity, small-molecule, short-chain organic matter, followed by biological treatment. However, the high toxicity and high ammonia nitrogen content in the wastewater inhibits microbial activity, leading to decreased treatment efficiency and incomplete nitrification and denitrification processes, making ammonia nitrogen difficult to degrade. Simultaneously, the competition and natural selection between autotrophic and heterotrophic microorganisms makes it difficult to control the dominant microbial populations, resulting in fluctuating effluent indicators that severely impact the normal operation of the wastewater treatment system.

[0004] For antibiotic bacterial residue, current treatment methods mainly include incineration, pyrolysis composting, and anaerobic digestion. However, due to the high moisture content (>70%) and large bound water content of the residue, mechanical dehydration is ineffective, increasing energy consumption. Incineration, for example, may result in incomplete combustion due to excessive moisture, potentially producing harmful substances such as SOx, NOx, and dioxins, causing secondary pollution. Pyrolysis technology involves heating the residue at high temperatures under anaerobic conditions to recover combustible gas, bio-oil, or biochar. However, it is also limited by the high moisture content of the residue, resulting in high energy consumption. Furthermore, the high nitrogen and sulfur content in the residue easily generates precursors of hydrocyanic acid and isocyanic acid. Composting and anaerobic digestion technologies are mainly limited by the difficulty in destroying mycelium, leading to antibiotic degradation, and the ecological safety issues caused by the spread of antibiotic resistance due to high concentrations of antibiotics and the resulting stress.

[0005] Given the aforementioned challenges, there is an urgent need to develop a green and environmentally friendly treatment technology that is highly efficient, low-energy-consumption, highly resource-efficient, and with minimal environmental pollution, in order to effectively render harmless and reduce the volume of high-ammonia nitrogen wastewater and antibiotic bacterial residue from antibiotic production processes. This is of great significance for the treatment and disposal of antibiotic production wastewater and bacterial residue, as well as for the health and sustainability of pharmaceutical companies.

[0006] Chinese patent application CN 115672951 B discloses a highly efficient and harmless treatment method for antibiotic bacterial residue. This method uses a mixed acid solution of nitric acid and sulfuric acid to hydrothermally degrade the residue, which can completely degrade antibiotics and facilitates the dissolution of the residue to generate a water-soluble small-molecule organic complex solution. However, the introduction of sulfate ions has an adverse effect on subsequent anaerobic digestion, and the method does not disclose the simultaneous treatment of high-ammonia nitrogen wastewater. Furthermore, for antibiotic bacterial residue with high solid content or after dehydration (10%-30% solid content), readjusting the moisture content for hydrothermal treatment not only wastes water resources but also fails to effectively utilize energy.

[0007] Patent CN 119430349 A discloses a method for treating high-concentration ammonia nitrogen wastewater. This method utilizes acid-coordinated sodium nitrite to regulate hydrothermal treatment of the wastewater, promoting ammonia nitrogen removal and nitrogen generation. However, this prior art does not disclose the synergistic treatment of high-ammonia nitrogen wastewater with antibiotic bacterial residue to achieve a synergistic effect of reducing the volume of the antibiotic bacterial residue. Summary of the Invention

[0008] The highly toxic bacterial residue generated during antibiotic production suffers from poor dehydration, difficulty in volume reduction, and low biodegradability, hindering its effective resource utilization. Furthermore, existing "solid-liquid separation + separate treatment" processes suffer from high costs, high energy consumption, and unstable treatment effects. This invention aims to provide a hydrothermal resource utilization method for co-treating chlorinated ammonia nitrogen-containing wastewater and antibiotic bacterial residue. This method involves co-treating antibiotic bacterial residue with chlorinated ammonia nitrogen-containing wastewater using hydrothermal methods. This utilizes the ammonia nitrogen wastewater to adjust the solid content while simultaneously supplementing the nitrogen source, and the ammonia nitrogen wastewater contains Cl... - This method can accelerate the dissolution of mycelial cell walls in antibiotic bacterial residue and promote the release of organic matter into the liquid phase, synergistically preparing a small-molecule carbon source through high-temperature hydrolysis. While reducing water waste and utilizing nitrogen resources, it also improves antibiotic removal and solids reduction rates. Furthermore, by utilizing the synergistic reaction of organic nitrogen in the organic matter of the antibiotic bacterial residue, it effectively promotes the conversion and removal of nitrate nitrogen in ammonia nitrogen wastewater, increasing the total nitrogen removal rate. This invention effectively reduces toxicity and ammonia nitrogen in mixed bacterial residue wastewater, while simultaneously achieving antibiotic bacterial residue reduction and antibiotic removal.

[0009] The objective of this invention is achieved through the following technical solution:

[0010] A method for the hydrothermal resource utilization of chlorine-containing ammonia nitrogen wastewater and antibiotic bacterial residue includes the following treatment steps:

[0011] (1) After thoroughly mixing the antibiotic bacterial residue and the chlorine-containing ammonia nitrogen wastewater, adjust the pH to 0.2-0.6 with an acidic solution;

[0012] (2) The mixed bacterial solution obtained after the pretreatment in step (1) is sent into a hydrothermal reactor and subjected to hydrothermal reaction at 150-200℃. The pressure is controlled at 0.5-1.0 MPa by a pressure stabilizing system. After the reaction is completed, the mixture is cooled, depressurized and discharged.

[0013] (3) The mixture obtained from the hydrothermal reaction in step (2) is separated into solid and liquid to obtain a small molecule composite liquid and solid residue after reduction and harmlessness.

[0014] Further, the antibiotic residue mentioned in step (1) is daptomycin residue with a moisture content of 65% to 90%, a COD concentration of 60,000 to 80,000 mg / L, an ammonia nitrogen concentration of 400 to 600 mg / L, a total phosphorus concentration of 300 to 500 mg / L, a total nitrogen concentration of 500 to 1,000 mg / L, and a daptomycin concentration of 30 to 1,000 mg / L.

[0015] Further, the COD concentration of the chlorine-containing ammonia nitrogen wastewater in step (1) is 5000–8000 mg / L, and the Cl... -The concentrations are 25,000–35,000 mg / L, ammonia nitrogen concentrations are 10,000–15,000 mg / L, total phosphorus concentrations are 10–20 mg / L, and total nitrogen concentrations are 12,000–18,000 mg / L.

[0016] Furthermore, the volume ratio of the antibiotic bacterial residue to the chlorine-containing ammonia nitrogen wastewater is 1:2 to 1:5.

[0017] Preferably, the solid content of the mixture of antibiotic bacterial residue and chlorine-containing ammonia nitrogen wastewater is 3% to 8% (wt.%).

[0018] Further, the acidic solution in step (1) is a nitric acid solution with a mass concentration of 60% to 70%.

[0019] Furthermore, the pressure stabilizing system in step (2) is an adjustable venting pressure stabilizing valve, and the discharged gas is collected and then fed into the alkaline washing tower for treatment.

[0020] Furthermore, the hydrothermal reaction time in step (2) is 2 to 4 hours.

[0021] Furthermore, the cooling method described in step (2) is a water cooling system.

[0022] Furthermore, after the reaction in step (2) is completed, the COD removal rate of the material is 51.61% to 55.75%, the ammonia nitrogen removal rate is 75.07% to 89.45%, the total nitrogen removal rate is 55.43% to 72.84%, the antibiotic removal rate is 96.59% to 100%, and the solids reduction rate is 87.78% to 93.35%.

[0023] Furthermore, the small molecule composite liquid obtained in step (3) is further adjusted in pH value and element ratio to obtain a small molecule carbon source for anaerobic digestion or composting.

[0024] Preferably, the method for adjusting the pH value is to adjust the pH value of the small molecule composite solution to 6.8-7.5 using sodium hydroxide or calcium hydroxide; the method for adjusting the element ratio is to adjust the carbon, nitrogen, and phosphorus ratio in the small molecule composite solution to 100:5:1 using sodium acetate and potassium dihydrogen phosphate.

[0025] The process flow diagram of the processing method of the present invention is as follows: Figure 1 As shown.

[0026] The principle of this invention lies in the fact that it achieves simultaneous water-slag treatment by co-thermally treating high-concentration ammonia nitrogen wastewater and antibiotic bacterial residue. Hydrothermal technology is used to create high-temperature, low-pressure hydrothermal conditions. Under high-temperature, acidic conditions, the Cl in the mixed solution... -This process promotes the rupture of flocculent structures and cell walls in the bacterial residue, thereby releasing large organic molecules such as lipids, polysaccharides, and proteins from the cells. These molecules then undergo hydrolysis and redox reactions to produce amino acids, CO2, H2O, and NO. x Small molecule intermediates. The ester and amide bonds of daptomycin also undergo hydrolysis and ring-opening under high-temperature acidic conditions, generating small molecule carboxylic acids, CO2, and nitrogen-containing fragments. Simultaneously, NH4 in the mixture... + Reducing organic nitrogen reacts with nitric acid at high temperatures to produce N2 and NO. x The method involves mixing water to achieve the simultaneous treatment of antibiotic bacterial residue with high solid content and wastewater with high concentration of ammonia nitrogen.

[0027] Compared with the prior art, the beneficial effects of the present invention are:

[0028] (1) The method of the present invention solves the problems of high cost, high energy consumption and resource waste caused by the separate treatment of antibiotic bacterial residue and wastewater. It simultaneously achieves the purpose of harmlessness, resource utilization and volume reduction of high-concentration ammonia nitrogen wastewater (ammonia nitrogen concentration of 10000-15000 mg / L) and high-solid-content antibiotic bacterial residue (solid content of 10%-35%).

[0029] (2) The present invention uses a pressure stabilization and exhaust method to stabilize the pressure in the reactor at 0.5-1.0 MPa, which can promote the forward reaction and reduce the safety risks caused by excessive pressure. The exothermic reaction occurring in the reactor can maintain the temperature required for the reaction process, which only needs to be maintained by appropriate heating. At the same time, the lower pressure requirement also greatly reduces the equipment cost and enables large-scale industrial production.

[0030] (3) The harmless and reduced-volume small molecule composite liquid obtained by the present invention can be used for anaerobic digestion or composting after adjusting the pH to 6.8-7.5 and adjusting the carbon, nitrogen and phosphorus ratio to close to 100:5:1. It has broad application prospects and important environmental significance. Attached Figure Description

[0031] Figure 1 This is a process flow diagram of the hydrothermal resource utilization method for ammonia nitrogen wastewater and antibiotic bacterial residue of the present invention.

[0032] Figure 2 This is a photograph of the actual morphology of the slurry-like antibiotic bacterial residue to be treated in the embodiment.

[0033] Figure 3 The image shows the physical morphology of the mixture of high-concentration ammonia nitrogen wastewater and antibiotic bacterial residue in the example.

[0034] Figure 4 The images show the physical forms of the harmless and reduced-volume solid residue and small-molecule composite liquid in the embodiments. Detailed Implementation

[0035] The present invention will be further described in detail below with reference to the embodiments and accompanying drawings, but the embodiments of the present invention are not limited thereto.

[0036] Example 1

[0037] A method for the hydrothermal resource utilization of chlorine-containing ammonia nitrogen wastewater and antibiotic bacterial residue includes the following treatment steps:

[0038] (1) Antibiotic bacterial residue (daptomycin bacterial residue from an antibiotic pharmaceutical factory, physical form as shown in the attached figure) Figure 2 As shown, COD: 72500 mg / L, ammonia nitrogen: 400 mg / L, total nitrogen: 856 mg / L, total phosphorus: 360 mg / L, daptomycin concentration: 256 mg / L, solid content: 21.83%) and high-concentration ammonium chloride wastewater (COD: 5578 mg / L, Cl) - (Contains: 31579 mg / L ammonia nitrogen, 13100 mg / L total nitrogen, 15060 mg / L total phosphorus, 16 mg / L) Mix at a volume ratio of 1:2 to form a mixed bacterial solution (actual form as shown in the attached image). Figure 3 As shown, COD: 27460 mg / L, ammonia nitrogen: 8710 mg / L, total nitrogen: 9948 mg / L, total phosphorus: 125 mg / L, daptomycin: 88 mg / L, solid content: 7.55%. The pH of the mixed bacterial culture was then adjusted to 0.6 using 68 wt% nitric acid.

[0039] (2) The pretreated mixed bacterial solution obtained in step (1) is sent to a hydrothermal reactor equipped with an adjustable venting and pressure-stabilizing valve. It is heated to 160°C by an oil bath and the pressure is maintained at 0.6 MPa for 2 hours by venting and stabilizing the gas through the venting and pressure-stabilizing valve. After the reaction is completed, the water cooling system is turned on to reduce the temperature inside the reactor to 80°C. Then, the venting and pressure-stabilizing valve is opened to release the gas and pressure. The gas is collected through the exhaust pipe and then sent to the alkaline washing tower for treatment. The discharge is started when the pressure inside the reactor drops to zero.

[0040] (3) The mixture after step (2) is discharged into the discharge tank. After static solid-liquid separation, the reduced-volume harmless small molecule composite liquid and solid residue are obtained (physical form as shown in the attached figure). Figure 4 (As shown). A small amount of solid residue was collected and transported off-site for disposal. The carbon, nitrogen, and phosphorus ratio of the liquid phase small molecule organic composite liquid was approximately 121:44:1. The pH of the liquid phase was adjusted to 6.8 using sodium hydroxide, and the carbon, nitrogen, and phosphorus ratio was adjusted to approximately 100:5:1 using sodium acetate and potassium dihydrogen phosphate to obtain a small molecule carbon source for anaerobic digestion or composting.

[0041] After hydrothermal treatment in step (2) of this embodiment, the COD in the mixed solution decreased to 12151 mg / L, ammonia nitrogen decreased to 2171 mg / L, total nitrogen decreased to 4433 mg / L, and daptomycin decreased to 3 mg / L, with corresponding removal rates of 55.75%, 75.07%, 55.43%, and 96.59%, respectively. (The determination methods for COD, ammonia nitrogen, total nitrogen, and daptomycin were rapid digestion spectrophotometry (HJT399-2007), Nessler's reagent spectrophotometry (HJ 535-2009), alkaline potassium persulfate digestion ultraviolet spectrophotometry (HJ 636-2012), and high performance liquid chromatography (USP). 43-NF38); Total phosphorus content was 109 mg / L, and the solids reduction rate was 87.78% (the solids reduction rate was calculated by differential gravimetric method: 50 mL of the mixed post-treatment sample was taken and filtered through a 0.22 μm organic filter membrane to obtain filter residue. The filter residue was vacuum dried for 8 h, and the mass of the dried sludge was weighed using a balance. The conversion unit is g / L. The sample before treatment was recorded as m1, and the sample after treatment was recorded as m2). ).

[0042] Example 2

[0043] A method for the hydrothermal resource utilization of chlorine-containing ammonia nitrogen wastewater and antibiotic bacterial residue includes the following treatment steps:

[0044] (1) Antibiotic bacterial residue (same as in Example 1) and high-concentration ammonium chloride wastewater (same as in Example 1) were mixed at a volume ratio of 1:3 to form a mixed bacterial solution (COD: 21654 mg / L, ammonia nitrogen: 9948 mg / L, total nitrogen: 12974 mg / L, total phosphorus: 98 mg / L, daptomycin: 71 mg / L, solid content: 5.42%). Then, the pH of the mixed bacterial solution was adjusted to 0.3 using 68 wt% nitric acid.

[0045] (2) The pretreated mixed bacterial solution obtained in step (1) is sent into a hydrothermal reactor equipped with an adjustable venting and pressure-stabilizing valve. It is heated to 200°C by an oil bath and the pressure is maintained at 1.0 MPa for 4 hours by venting and stabilizing the gas through the venting and pressure-stabilizing valve. After the reaction is completed, the water cooling system is turned on to reduce the temperature inside the reactor to 80°C. Then, the venting and pressure-stabilizing valve is opened to release the gas and pressure. The gas is collected through the exhaust pipe and then sent to the alkaline washing tower for treatment. When the pressure inside the reactor drops to zero, the discharge is started.

[0046] (3) The mixture after step (2) is discharged into the discharge tank. After static solid-liquid separation, the reduced-volume harmless small molecule composite liquid and solid residue are obtained. A small amount of solid residue is collected and transported for disposal. The carbon, nitrogen and phosphorus ratio of the liquid phase small molecule organic composite liquid is about 99:43:0.8. The pH of the liquid phase is adjusted to 7.2 using sodium hydroxide and the carbon, nitrogen and phosphorus ratio is adjusted to about 100:5:1 using sodium acetate and potassium dihydrogen phosphate to obtain a small molecule carbon source for anaerobic digestion or composting.

[0047] After hydrothermal treatment in step (2) of this embodiment, the COD in the mixed solution decreased to 9942 mg / L, ammonia nitrogen decreased to 1838 mg / L, total nitrogen decreased to 4285 mg / L, and daptomycin decreased below the detection line, with corresponding removal rates of 54.09%, 81.52%, 66.97%, and 100%, respectively; the total phosphorus content was 84 mg / L, and the solids reduction rate was 91.64%.

[0048] Example 3

[0049] A method for the hydrothermal resource utilization of chlorine-containing ammonia nitrogen wastewater and antibiotic bacterial residue includes the following treatment steps:

[0050] (1) Antibiotic bacterial residue (same as in Example 1) and high-concentration ammonium chloride wastewater (same as in Example 1) were mixed at a volume ratio of 1:5 to form a mixed bacterial solution (COD: 17612 mg / L, ammonia nitrogen: 11654 mg / L, total nitrogen: 13183 mg / L, total phosphorus: 75 mg / L, daptomycin concentration: 48 mg / L, solid content: 3.46%). Then, the pH of the mixed bacterial solution was adjusted to 0.4 using 68 wt% nitric acid.

[0051] (2) The pretreated mixed bacterial solution obtained in step (1) is sent into a hydrothermal reactor equipped with an adjustable venting and pressure-stabilizing valve. It is heated to 180°C by an oil bath and the pressure is maintained at 0.8 MPa for 3 hours by venting and stabilizing the gas through the venting and pressure-stabilizing valve. After the reaction is completed, the water cooling system is turned on to reduce the temperature inside the reactor to 80°C. Then, the venting and pressure-stabilizing valve is opened to release the gas and pressure. The gas is collected through the exhaust pipe and then sent to the alkaline washing tower for treatment. The discharge is started when the pressure inside the reactor drops to zero.

[0052] (3) The mixture after treatment in step (2) is discharged into the discharge tank. After static solid-liquid separation, a small molecule composite liquid and a solid residue after reduction and harmlessness are obtained. A small amount of solid residue is collected and transported for disposal. The carbon, nitrogen and phosphorus ratio of the liquid phase small molecule organic composite liquid is about 85:12:0.7. The pH of the liquid phase is adjusted to 7.4 using sodium hydroxide and the carbon, nitrogen and phosphorus ratio is adjusted to about 100:5:1 using sodium acetate and potassium dihydrogen phosphate to obtain a small molecule carbon source for anaerobic digestion or composting.

[0053] After hydrothermal treatment in step (2) of this embodiment, the COD in the mixed solution decreased to 8522 mg / L, ammonia nitrogen decreased to 1229 mg / L, total nitrogen decreased to 3581 mg / L, and daptomycin decreased to the detection line, with corresponding removal rates of 51.61%, 89.45%, 72.84%, and 100%, respectively; the total phosphorus content was 71 mg / L, and the solids reduction rate was 93.35%.

[0054] Comparative Example 1

[0055] Compared with Example 1, this comparative example only treated high-concentration ammonium chloride wastewater, with all other conditions remaining the same.

[0056] After treatment in this comparative example, the COD in the solution decreased to 3153 mg / L, ammonia nitrogen decreased to 6491 mg / L, total nitrogen decreased to 12782 mg / L, and total phosphorus decreased to 14 mg / L, with corresponding removal rates of 43.47%, 50.45%, 15.13%, and 12.5%, respectively.

[0057] While this comparative example showed some removal effect on COD and ammonia nitrogen when treating only high-ammonia-nitrogen wastewater, the removal rate of total nitrogen was only 15.12%. The lack of synergistic reaction of organic nitrogen from the antibiotic residue during the reaction process meant that some nitrogen remained in the wastewater as nitrate nitrogen, unable to be directly converted into N2 and NO. x The nitrogen content is still high because it is removed.

[0058] Comparative Example 2

[0059] Compared with Example 1, this comparative example only changed the high-concentration ammonium chloride wastewater to ordinary tap water, which was then mixed with antibiotic bacterial residue at a volume ratio of 2:1 (the mixed solution was measured to have a COD of 24651 mg / L, ammonia nitrogen of 142 mg / L, total nitrogen of 268 mg / L, total phosphorus of 126 mg / L, daptomycin of 82 mg / L, and solid content of 7.24%). All other conditions remained the same.

[0060] After treatment in this comparative example, the COD in the mixed liquor decreased to 15947 mg / L, ammonia nitrogen decreased to 85 mg / L, total nitrogen decreased to 134 mg / L, and daptomycin decreased to 8 mg / L, with corresponding removal rates of 35.31%, 40.14%, 50.00%, and 90.24%, respectively; the total phosphorus content was 122 mg / L, and the solids reduction rate was 74.79%.

[0061] In this comparative example, when antibiotic bacterial residue was treated alone, the removal efficiency of various indicators was generally reduced, especially the removal rate of solids content, which was only 74.79%, while a high level of daptomycin residue remained. This may be due to the lack of Cl- from the high-ammonium chloride wastewater. - Ions damage the biofilm and cell walls in antibiotic residue, preventing the organic matter from being fully degraded. The daptomycin contained therein is not completely released into the liquid phase for full oxidation and decomposition, resulting in low removal efficiency of solid content and daptomycin.

[0062] The above embodiments are preferred embodiments of the present invention, but the embodiments of the present invention are not limited to the above embodiments. Any changes, modifications, substitutions, combinations, or simplifications made without departing from the spirit and principle of the present invention shall be considered equivalent substitutions and shall be included within the protection scope of the present invention.

Claims

1. A method for the hydrothermal resource utilization of chlorine-containing ammonia nitrogen wastewater and antibiotic bacterial residue, characterized in that, The processing steps include the following: (1) After thoroughly mixing the antibiotic bacterial residue and the chlorine-containing ammonia nitrogen wastewater, adjust the pH to 0.2~0.6 with an acidic solution; (2) The mixed bacterial solution obtained after pretreatment in step (1) is sent into a hydrothermal reactor and subjected to hydrothermal reaction at 150~200℃. The pressure is controlled at 0.5~1.0 MPa by a pressure stabilizing system. After the reaction is completed, the mixture is cooled, depressurized and discharged. (3) The mixture obtained from the hydrothermal reaction in step (2) is subjected to solid-liquid separation to obtain a small molecule composite liquid and solid residue after reduction and harmlessness; The antibiotic residue mentioned in step (1) is daptomycin residue, with a water content of 65%~90%, a COD concentration of 60000~80000 mg / L, an ammonia nitrogen concentration of 400~600 mg / L, a total phosphorus concentration of 300~500 mg / L, a total nitrogen concentration of 500~1000 mg / L, and a daptomycin concentration of 30~1000 mg / L; The COD concentration of the chlorine-containing ammonia nitrogen wastewater in step (1) is 5000~8000 mg / L, Cl - The concentrations are 25,000–35,000 mg / L, ammonia nitrogen concentrations are 10,000–15,000 mg / L, total phosphorus concentrations are 10–20 mg / L, and total nitrogen concentrations are 12,000–18,000 mg / L. The volume ratio of the antibiotic bacterial residue to the chlorine-containing ammonia nitrogen wastewater is 1:2 to 1:

5.

2. The method for hydrothermal resource utilization of chlorine-containing ammonia nitrogen wastewater and antibiotic bacterial residue according to claim 1, characterized in that, The solid content of the mixture of antibiotic bacterial residue and chlorine-containing ammonia nitrogen wastewater is 3% to 8%.

3. The method for the co-hydrothermal resource utilization of chlorine-containing ammonia nitrogen wastewater and antibiotic bacterial residue according to claim 1, characterized in that, The acidic solution in step (1) is a nitric acid solution with a mass concentration of 60%~70%.

4. The method for hydrothermal resource utilization of chlorine-containing ammonia nitrogen wastewater and antibiotic bacterial residue according to claim 1, characterized in that, The pressure stabilizing system in step (2) is an adjustable venting pressure stabilizing valve. The discharged gas is collected and then fed into the alkaline washing tower for treatment. The hydrothermal reaction time is 2-4 hours. The cooling method is a water cooling system.

5. The method for hydrothermal resource utilization of chlorine-containing ammonia nitrogen wastewater and antibiotic bacterial residue according to claim 1, characterized in that, After the reaction in step (2) is completed, the COD removal rate of the material is 51.61%~55.75%, the ammonia nitrogen removal rate is 75.07%~89.45%, the total nitrogen removal rate is 55.43%~72.84%, the antibiotic removal rate is 96.59%~100%, and the solids reduction rate is 87.78%~93.35%.

6. The method for co-hydrothermal resource utilization of chlorine-containing ammonia nitrogen wastewater and antibiotic bacterial residue according to claim 1, characterized in that, The small molecule composite liquid obtained in step (3) is further adjusted in pH value and element ratio to obtain a small molecule carbon source for anaerobic digestion or composting.

7. The method for hydrothermal resource utilization of chlorine-containing ammonia nitrogen wastewater and antibiotic bacterial residue according to claim 6, characterized in that, The method for adjusting the pH value is to use sodium hydroxide or calcium hydroxide to adjust the pH value of the small molecule composite solution to 6.8~7.5; the method for adjusting the element ratio is to use sodium acetate and potassium dihydrogen phosphate to adjust the carbon, nitrogen and phosphorus ratio in the small molecule composite solution to 100:5:1.

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