Preparation method of wastewater biochemical treatment accelerant taking sepiolite as carrier

Abstract

The invention provides a method for preparing a wastewater biochemical treatment accelerant by taking sepiolite as a carrier, which comprises the following steps of: preparing sepiolite powder, and selecting 150-200-mesh acidified and activated sepiolite powder to ensure that the sepiolite powder has a good pore structure and surface activity; manganese dioxide powder is added, the 200-mesh manganese dioxide powder is added into the sepiolite powder, and the manganese dioxide powder and the sepiolite powder are fully mixed, so that the microelement adsorption capacity of the sepiolite is enhanced, and formation of free ammonia is promoted; a metal salt solution is added, ferrous sulfate, zinc sulfate, copper sulfate, nickel sulfate, potassium iodide, sodium molybdate, cobaltous sulfate, sodium selenite and potassium fluoride are sequentially added for a reaction, and it is ensured that the proportion of each component is within a specified range. The product has excellent adsorption performance and long-acting slow release characteristic, can significantly improve the growth environment of microorganisms and enhance the impact resistance and stability of the system, and is especially suitable for wastewater treatment scenes containing trace heavy metal pollutants or trace toxic substances, such as livestock and poultry breeding wastewater.

Description

Technical Field

[0001] The invention relates to the technical field of water treatment, and in particular to a method for preparing a wastewater biochemical treatment accelerator using sepiolite as a carrier. Background Art

[0002] With the acceleration of industrial development and urbanization, water pollution is becoming increasingly serious, and higher requirements are placed on sewage treatment technology. Although traditional chemical precipitation methods, biological treatment methods, etc. can purify water quality to a certain extent, they have problems such as low removal efficiency, high operating costs, and secondary pollution. In the water treatment process, trace elements are crucial to the growth and metabolism of microorganisms in water. In the prior art, the provision of trace elements usually relies on chemical additives, but these methods have problems such as high cost of use, short-lasting effects, and secondary pollution to the environment. Therefore, it is of great significance to develop a water treatment promoter that has the ability to release trace elements over a long period of time and can improve the stability of the water treatment system.

[0003] In recent years, the research on using natural mineral materials as carriers to adsorb heavy metal ions and other harmful substances has gradually increased. Among them, sepiolite has become one of the research hotspots due to its unique physical and chemical properties, such as porous structure, large specific surface area and good cation exchange capacity. Sepiolite has good adsorption capacity due to its porous structure and large specific surface area. After acidification and activation treatment, sepiolite can enhance its adsorption capacity for trace elements, thereby playing its role in promoting microbial growth and system stability in water treatment. However, when sepiolite is used alone for water treatment, its efficiency still needs to be improved. Therefore, how to further optimize the application effect of sepiolite and develop an efficient composite water treatment promoter has become an urgent problem to be solved. Summary of the invention

[0004] The invention provides a method for preparing a wastewater biochemical treatment accelerator using sepiolite as a carrier, so as to solve the defects in the prior art.

[0005] The present invention provides a method for preparing a wastewater biochemical treatment accelerator using sepiolite as a carrier, comprising: preparing sepiolite powder, selecting acid-activated sepiolite powder with a mesh size of 150-200, and ensuring that the powder has good pore structure and surface activity;

[0006] Adding manganese dioxide powder, adding 200 mesh manganese dioxide powder to sepiolite powder, and mixing the two thoroughly to enhance the trace element adsorption capacity of sepiolite and promote the formation of free ammonia;

[0007] Add metal salt solution, and add ferrous sulfate, zinc sulfate, copper sulfate, nickel sulfate, potassium iodide, sodium molybdate, cobalt sulfate, sodium selenite, potassium fluoride and other metal salts in turn to react, ensuring that the proportion of each component is within the specified range to enhance the supply of trace elements.

[0008] According to a method for preparing a wastewater biochemical treatment accelerator using sepiolite as a carrier provided by the present invention, the specific proportions of ferrous sulfate, zinc sulfate, copper sulfate, nickel sulfate, potassium iodide, sodium molybdate, cobalt sulfate, sodium selenite and potassium fluoride are:

[0009] Ferrous sulfate: 200-300 parts

[0010] Zinc sulfate: 150-250 parts

[0011] Copper sulfate: 100-150 parts

[0012] Nickel sulfate: 50-100 parts

[0013] Potassium iodide: 30-50 parts

[0014] Sodium molybdate: 20-30 parts

[0015] Cobalt sulfate: 10-20 parts

[0016] Sodium selenite: 3-5 parts

[0017] Potassium fluoride: 2-3 parts.

[0018] According to the preparation method of a wastewater biochemical treatment promoter using sepiolite as a carrier provided by the present invention, a metal salt solution is added and stirred and reacted, and the mixture is placed in a reactor and stirred and reacted for 4 hours to ensure that all components react fully.

[0019] According to a method for preparing a wastewater biochemical treatment promoter using sepiolite as a carrier provided by the present invention, after the reaction is completed, steam is used to perform a secondary activation treatment on the mixture to further increase the hydrophilicity of its surface and promote the stability of trace elements.

[0020] According to the preparation method of a wastewater biochemical treatment accelerator using sepiolite as a carrier provided by the present invention, a drying treatment is performed after activation treatment, and excess water is removed by a drying method to obtain a final water treatment accelerator product.

[0021] According to the present invention, a preparation method of a wastewater biochemical treatment promoter using sepiolite as a carrier is provided. The promoter is used in sewage treatment, especially in treating wastewater containing trace heavy metal pollutants or trace toxic substances. The powder is added to the water inlet pool and mixed with the sewage and then flows into the anaerobic pool / tank through a pump or gravity.

[0022] According to the method for preparing a wastewater biochemical treatment accelerator using sepiolite as a carrier provided by the present invention, the proportion of the acidified activated sepiolite component with a mesh size of 150-200 is 5000-10000 parts.

[0023] According to the method for preparing a wastewater biochemical treatment accelerator using sepiolite as a carrier provided by the present invention, the added manganese dioxide powder component ratio of 200 meshes is 500-1000 parts.

[0024] The present invention provides a method for preparing a water treatment promoter with sepiolite as a carrier, wherein the promoter is mainly composed of 150-200 mesh acid-activated sepiolite powder, supplemented with an appropriate amount of manganese dioxide powder and other trace elements (such as ferrous sulfate, zinc sulfate, copper sulfate, nickel sulfate, potassium iodide, sodium molybdate, cobalt sulfate, sodium selenite, potassium fluoride). Through reasonable formula design and process flow control, the finished product is made after being fully mixed in a reactor. This product has excellent adsorption performance and long-term sustained release characteristics, can significantly improve the microbial growth environment, enhance the impact resistance and stability of the system, and is particularly suitable for wastewater treatment scenarios containing trace heavy metal pollutants or trace toxic substances. The obtained promoter has the following beneficial effects:

[0025] Improve the living environment of microorganisms: The porous structure of sepiolite itself gives it a huge specific surface area, which is not only conducive to the adsorption of a large number of trace elements, but also allows these elements to be slowly released during subsequent applications, maintaining effective supply for a longer period of time, and providing ideal living conditions for microorganisms.

[0026] Enhanced ammonia nitrogen removal capacity: The presence of manganese dioxide helps promote the formation of free ammonia, which is essential for the activity of ammonia oxidizing bacteria in anaerobic environments, and can also indirectly support the adsorption function of sepiolite on trace nutrients.

[0027] Improve system stability: Even in the face of sudden heavy metal pollution incidents, sepiolite can quickly capture these harmful substances with its strong adsorption capacity, reducing their harm to the microbial community in the ecosystem, thereby improving the impact resistance of the entire treatment system and the possibility of long-term stable operation. DETAILED DESCRIPTION

[0028] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in combination with the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, but not all of the embodiments. The components of the embodiments of the present invention described and shown herein can be arranged and designed in various different configurations.

[0029] Therefore, the detailed description of the embodiments of the present invention is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0030] It should be noted that the terms “first”, “second”, etc. are only used for distinguishing descriptions and should not be understood as indicating or implying relative importance.

[0031] In the description of the embodiments of the present invention, it should be noted that the terms "inside", "outside", "upper", etc. indicate the orientation or position relationship, or the orientation or position relationship in which the product of the invention is usually placed when used, only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0032] A novel water treatment accelerator and a preparation method thereof are provided in the embodiment of the present application. The accelerator is mainly composed of 150-200 mesh acidified activated sepiolite powder, and is supplemented with an appropriate amount of manganese dioxide powder and other trace elements (such as ferrous sulfate, zinc sulfate, copper sulfate, nickel sulfate, potassium iodide, sodium molybdate, cobalt sulfate, sodium selenite, potassium fluoride). Through reasonable formula design and process flow control, the finished product is made after being fully mixed in a reactor. This product has excellent adsorption performance and long-term sustained release characteristics, can significantly improve the microbial growth environment, enhance the impact resistance and stability of the system, and is particularly suitable for wastewater treatment scenarios containing heavy metal pollution.

[0033] Components and proportions: The water treatment accelerator comprises the following components in parts by mass:

[0034] 150-200 mesh acid-activated sepiolite powder: 5000-10000 parts

[0035] 200 mesh manganese dioxide powder: 500-1000 parts

[0036] Ferrous sulfate: 200-300 parts

[0037] Zinc sulfate: 150-250 parts

[0038] Copper sulfate: 100-150 parts

[0039] Nickel sulfate: 50-100 parts

[0040] Potassium iodide: 30-50 parts

[0041] Sodium molybdate: 20-30 parts

[0042] Cobalt sulfate: 10-20 parts

[0043] Sodium selenite: 3-5 parts

[0044] Potassium fluoride: 2-3 parts

[0045] Preparation method: The preparation method provided by the present invention comprises the following steps:

[0046] Step 1: Prepare the ingredients

[0047] Select various raw materials that meet the above specifications and ensure that their purity meets the corresponding standards. Especially for sepiolite powder, it should be acidified first to improve its surface activity so as to better play the adsorption role.

[0048] Step 2: Preliminary mixing

[0049] Add a certain amount of sepiolite powder into the mixing container, and then add an appropriate amount of manganese dioxide powder in sequence to ensure that the two materials can be evenly dispersed. During this process, the speed and time can be appropriately adjusted to ensure full contact between the materials.

[0050] Step 3: Prepare the solution

[0051] Prepare aqueous solutions of all other trace elements in the specified proportions and slowly pour them into the premixed solid matrix. Pay attention to controlling the speed of adding liquid to avoid excessive local concentration that affects the quality of the final product.

[0052] Step 4: Reaction process

[0053] The mixture is transferred to a sealed reactor and stirred continuously for about 4 hours at a certain temperature (e.g., about 60°C). During this period, the reaction progress can be evaluated by monitoring the pH value change, and the conditions can be fine-tuned to achieve the best effect if necessary.

[0054] Step 5: Secondary activation and drying

[0055] After completing the above reaction, the steam heating system is turned on to perform a second activation treatment on the product, and then the excess moisture is removed by natural air drying or low-temperature drying until the moisture content is lower than a certain set threshold.

[0056] Example 1

[0057] Preparation of water treatment accelerator under standard formula

[0058] Raw material preparation

[0059] Select sepiolite powder that meets the specifications of 150-200 mesh and ensure that it has been acidified and activated. Take 7500 parts by mass.

[0060] A 200-mesh manganese dioxide powder was prepared, and 750 parts by mass was used.

[0061] 250 parts by mass of ferrous sulfate, 200 parts by mass of zinc sulfate, 125 parts by mass of copper sulfate, 75 parts by mass of nickel sulfate, 40 parts by mass of potassium iodide, 25 parts by mass of sodium molybdate, 15 parts by mass of cobalt sulfate, 4 parts by mass of sodium selenite, and 2.5 parts by mass of potassium fluoride were weighed respectively.

[0062] After preliminary mixing, add the sepiolite powder to the mixing container, turn on the agitator and gradually add the manganese dioxide powder, adjust the speed to 30 rpm, and continue stirring for 30 minutes to ensure uniform dispersion.

[0063] Prepare the solution and prepare the aqueous solution of trace elements according to the established ratio. For example, dissolve all the trace elements mentioned above in an appropriate amount of distilled water (the specific amount of water is determined according to the solubility), and then slowly pour it into the premixed solid matrix, control the liquid addition speed to 50 ml per minute, and keep stirring to prevent excessive local concentration.

[0064] During the reaction, the mixture was transferred to a closed reactor and stirred continuously for 4 hours at 60°C. During this period, the pH value was monitored and the initial pH was set at about 6.0. If necessary, the pH value could be fine-tuned with diluted acid or base to maintain a stable state.

[0065] Secondary activation and drying: After the above reaction is completed, the product is subjected to secondary activation treatment using a steam heating system, the time is set to 1 hour, and the temperature is controlled at 80° C. Subsequently, the excess water is removed by low-temperature drying until the water content is less than 5%.

[0066] Example 2

[0067] Preparation of water treatment accelerator under optimized formula

[0068] This embodiment is similar to Embodiment 1, but the proportions of some components are adjusted to explore better performance.

[0069] 9000 parts by mass of sepiolite powder were used.

[0070] 800 parts by mass of manganese dioxide powder were used.

[0071] The mass parts of other trace elements are: 280 parts of ferrous sulfate, 230 parts of zinc sulfate, 130 parts of copper sulfate, 80 parts of nickel sulfate, 45 parts of potassium iodide, 28 parts of sodium molybdate, 18 parts of cobalt sulfate, 4 parts of sodium selenite, and 3 parts of potassium fluoride.

[0072] The raw material preparation, preliminary mixing, solution preparation, reaction process, secondary activation and drying operations were carried out according to the same steps as in Example 1. The only difference is that due to the increase in the proportion of certain ingredients, it may be necessary to appropriately extend the reaction time and adjust the pH monitoring strategy to ensure the best effect.

[0073] For each step in each of the above embodiments, environmental conditions (such as temperature, humidity, etc.) and process parameters (such as stirring rate, liquid addition speed, etc.) should be strictly controlled to ensure the quality and performance of the final product. In addition, detailed experimental data should be recorded after each experiment, including but not limited to the time, temperature, pH value changes at each stage, etc., to facilitate subsequent analysis and optimization of formulation design.

[0074] Performance Test:

[0075] Adsorption performance test: Through experimental tests, the adsorption capacity of the water treatment accelerator on wastewater containing heavy metals (such as lead, cadmium, chromium, etc.) was measured. The test results show that the accelerator has a significant adsorption effect on heavy metal ions, and the adsorption efficiency remains stable during use.

[0076] Sustained-release performance test: The dissolution test was used to test the ability of the promoter to slowly release trace elements in water. The experiment showed that the promoter can slowly release trace elements, continuously improve the growth environment of microorganisms, and enhance the stability and impact resistance of the wastewater treatment system.

[0077] Treatment of wastewater containing trace heavy metals: The prepared water treatment accelerator is applied to livestock and poultry wastewater treatment plants to treat wastewater containing zinc, arsenic and copper. After treatment, the concentration of heavy metals in the wastewater is greatly reduced, the removal rate of anaerobic and aerobic pollutants is significantly improved, and the impact resistance and stability of the system are significantly improved.

[0078] Implementation effect:

[0079] This water treatment accelerator can not only effectively remove heavy metal pollution in wastewater, but also improve the biodegradation efficiency of the system, adapt to complex and changeable water quality conditions, and has long-term slow-release characteristics, which can significantly improve the growth environment of microorganisms and improve treatment efficiency. The preparation process of this product is simple and economical, and is suitable for large-scale application.

[0080] Optimization of large-scale production

[0081] In order to improve production efficiency and reduce costs, the following aspects can be further optimized in large-scale production:

[0082] Reactor selection and optimization

[0083] Reactor selection: Choose a reactor with appropriate capacity, corrosion resistance and high temperature resistance to ensure that it can handle large quantities of raw materials and meet the needs of long-term, high-temperature reactions. It is recommended to use stainless steel or other corrosion-resistant materials, and the lining should have good acid and alkali resistance.

[0084] Temperature control and stirring system optimization: Equipped with an efficient temperature control system, the reaction temperature can be automatically adjusted to ensure that the reaction is within the appropriate temperature range (such as 60°C). The stirring system should use an adjustable speed, high-efficiency stirring device to ensure that the materials are mixed evenly and avoid precipitation or local excessive concentration. It is recommended to use a spiral stirrer on the inner wall of the reactor to effectively promote the mixing of materials.

[0085] Pressure and atmosphere control: If necessary, the reaction environment can be controlled by applying a slightly inert gas (such as nitrogen) to avoid oxidation or decomposition of certain components.

[0086] Optimization of secondary activation treatment

[0087] Multi-stage hot air circulation system: During the second activation process, it is recommended to use a multi-stage hot air circulation drying system to use circulating hot air to improve drying efficiency and ensure that the material is heated evenly. This system can accelerate water evaporation and make the drying process more uniform.

[0088] Low-temperature drying technology: In order to avoid the loss or decomposition of certain trace elements caused by high temperature, low-temperature drying (temperature controlled between 40°C and 50°C) can be used to gradually remove moisture and ensure the stability of the ingredients of the final product.

[0089] Humidity control: During the drying process, special attention should be paid to humidity monitoring. You can consider introducing a humidity sensor to monitor and adjust the air volume in real time to ensure that the material does not absorb moisture or over-dry during the drying process.

[0090] Quality control and production process monitoring

[0091] Raw material quality control: The source of all raw materials should be strictly verified to ensure that their purity and composition meet the standards. In particular, for sepiolite powder, it is necessary to confirm whether its acidification treatment has achieved the expected effect. Random sampling inspection of raw materials can be carried out before production to ensure its performance consistency.

[0092] Optimization of ingredients and mixing process: When adding various components (such as manganese dioxide powder, ferrous sulfate, etc.), ensure accurate quantitative addition. In order to avoid uneven dispersion or agglomeration of manganese dioxide powder, consider using ultrasonic assisted dispersion technology to make the powder more evenly distributed in the sepiolite powder and improve the overall activity of the product.

[0093] Real-time reaction monitoring and data recording: During the reaction process, temperature sensors, pH meters and other equipment can be used for real-time monitoring to ensure that the reaction process is in an ideal state and that parameters can be adjusted in a timely manner. In addition, it is recommended to record the data of each production batch for subsequent traceability and quality management.

[0094] Improve reaction conditions

[0095] Solution addition method: In the process of preparing the solution, it is recommended to add materials gradually and stir slowly to avoid excessive concentration or local precipitation of the solution. At the same time, the pH value of the solution can be adjusted to ensure the effectiveness of each substance in the reaction and avoid too fast or incomplete reaction.

[0096] Environmental impact and production efficiency

[0097] Green production concept: In the production process, we can consider reducing the use of environmentally harmful chemicals, using more environmentally friendly solvents and detergents, reducing waste emissions, and meeting the requirements of modern sustainable production. Environmental pollution in production can be reduced through circulating water systems and waste gas treatment devices.

[0098] Energy saving and consumption reduction: Optimize energy consumption in the production process and use energy-saving equipment as much as possible. In addition to optimizing the hot air circulation system, you can also optimize the steam heating system and choose an efficient steam generator to reduce energy waste.

[0099] Product packaging and storage

[0100] Packaging design: The finished product should be packaged in moisture-proof and anti-oxidation materials to avoid the failure of ingredients due to moisture or oxidation. It is recommended to use aluminum foil bags, plastic barrels or vacuum packaging to ensure the stability of the product.

[0101] Storage conditions: The product should be stored in a cool, dry environment to avoid high temperature and humidity that may affect its quality. It is best to provide a suitable temperature and humidity control system to ensure the effectiveness of the product after long-term storage.

[0102] The accelerator obtained according to the method of the embodiment of the present application has the following beneficial effects:

[0103] Improve the living environment of microorganisms: The porous structure of sepiolite itself gives it a huge specific surface area, which is not only conducive to the adsorption of a large number of trace elements, but also allows these elements to be slowly released during subsequent applications, maintaining effective supply for a longer period of time, and providing ideal living conditions for microorganisms.

[0104] Enhanced ammonia nitrogen removal capacity: The presence of manganese dioxide helps promote the formation of free ammonia, which is essential for the activity of ammonia oxidizing bacteria in anaerobic environments, and can also indirectly support the adsorption function of sepiolite on trace nutrients.

[0105] Improve system stability: Even in the face of sudden heavy metal pollution incidents, sepiolite can quickly capture these harmful substances with its strong adsorption capacity, reducing their harm to the microbial community in the ecosystem, thereby improving the impact resistance of the entire treatment system and the possibility of long-term stable operation.

[0106] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A method for preparing a wastewater biochemical treatment accelerator using sepiolite as a carrier, characterized in that: include: Prepare sepiolite powder, select 150-200 mesh acid-activated sepiolite powder to ensure it has good pore structure and surface activity; Adding manganese dioxide powder, adding 200 mesh manganese dioxide powder to sepiolite powder, and mixing the two thoroughly to enhance the trace element adsorption capacity of sepiolite and promote the formation of free ammonia; Add metal salt solution, and add ferrous sulfate, zinc sulfate, copper sulfate, nickel sulfate, potassium iodide, sodium molybdate, cobalt sulfate, sodium selenite, potassium fluoride and other metal salts in turn to react, ensuring that the proportion of each component is within the specified range to enhance the supply of trace elements.

2. The method for preparing a wastewater biochemical treatment accelerator using sepiolite as a carrier according to claim 1, characterized in that: The specific proportions of ferrous sulfate, zinc sulfate, copper sulfate, nickel sulfate, potassium iodide, sodium molybdate, cobalt sulfate, sodium selenite and potassium fluoride are as follows: Ferrous sulfate: 200-300 parts Zinc sulfate: 150-250 parts Copper sulfate: 100-150 parts Nickel sulfate: 50-100 parts Potassium iodide: 30-50 parts Sodium molybdate: 20-30 parts Cobalt sulfate: 10-20 parts Sodium selenite: 3-5 parts Potassium fluoride: 2-3 parts.

3. The method for preparing a wastewater biochemical treatment accelerator using sepiolite as a carrier according to claim 1, characterized in that: After adding the metal salt solution, stirring and reacting were performed, and the mixture was placed in a reactor and stirred for 4 hours to ensure that all components reacted fully.

4. The method for preparing a wastewater biochemical treatment accelerator using sepiolite as a carrier according to claim 3, characterized in that: After the reaction is completed, the mixture is subjected to a secondary activation treatment using steam to further increase the hydrophilicity of its surface and promote the stability of trace elements.

5. The method for preparing a wastewater biochemical treatment accelerator using sepiolite as a carrier according to claim 4, characterized in that: After the activation treatment, a drying treatment is performed to remove excess water to obtain the final water treatment accelerator product.

6. The method for preparing a wastewater biochemical treatment accelerator using sepiolite as a carrier according to claim 5, characterized in that: The accelerator is used in sewage treatment, especially in the treatment of wastewater containing trace heavy metal pollutants or trace toxic substances. The powder is added to the water inlet pool and mixed with the sewage and then flows into the anaerobic pool / tank through a pump or gravity flow.

7. The method for preparing a wastewater biochemical treatment accelerator using sepiolite as a carrier according to claim 1, characterized in that: The added 150-200 mesh acid-activated sepiolite component has a proportion of 5000-10000 parts.

8. The method for preparing a wastewater biochemical treatment accelerator using sepiolite as a carrier according to claim 1, characterized in that: The added 200-mesh manganese dioxide powder component ratio is 500-1000 parts.