Bio-treatment photovoltaic cell driven near-infrared targeted drying method and device for printing and dyeing sludge

Abstract

The present application relates to a kind of printing and dyeing sludge biological treatment photovoltaic cell drive near-infrared targeted drying method and device, the present application is directed to the characteristics of active organic matter, inert organic matter, heavy metal etc. in sludge, the light initiator with strong near-infrared light absorption capacity, stable chemical properties, low price is introduced into the printing and dyeing sludge after biological pretreatment, the organic matter often on the surface of nano particle and macromolecular solid organic matter in sludge can be closely combined, when these nano particles are irradiated by near-infrared light, its surface will occur plasmonic resonance phenomenon, leading to strong electric field and heat generation, so that near-infrared energy is efficiently focused around target material, near-infrared targeted heating drying is realized, and sludge treatment rate is significantly improved. Metal nanoparticles interact with bacterial cells by charge, destroy their membranes and walls, destroy charge exchange, interfere with ribosome assembly and enzyme activity, achieve the effect of sterilization and disinfection.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of printing and dyeing sludge treatment, in particular to a printing and dyeing sludge biological treatment photovoltaic cell driven near-infrared targeted drying method and device. BACKGROUND

[0002] Printing and dyeing sludge refers to a special type of industrial sludge generated in the process of textile printing and dyeing, mainly derived from the wastewater treatment in the process of dyeing, printing and finishing of textile industry. Due to the complexity of printing and dyeing process, the wastewater contains various microfibers, dyes, auxiliaries and other organic substances, as well as some heavy metals and other chemical substances. Printing and dyeing sludge contains various organic matter, heavy metals and pathogenic microorganisms, etc. Various microorganisms are composed of water, protein, nucleic acid, carbohydrate, fat and inorganic matter, which is a condensed medium composed of complex compounds, and the content of water is 75%-85%. The sludge has the characteristics of large capacity and instability. Some sludge solid organic matter has a high content of up to 42%, and has a large molecular weight, high boiling point and difficult degradation, which is especially prone to spoilage and deterioration, and becomes foul-smelling, toxic and harmful to human body. If not properly treated or disposed, it will cause serious secondary pollution accidents such as pollution of water invasion into groundwater and odor gas erosion into the atmosphere. Therefore, proper treatment and disposal of printing and dyeing sludge is an important issue in environmental protection and sustainable development.

[0003] Biological enzyme is one of the most promising frontiers of biological technology, which has been widely used in biology, medicine, agriculture, food, chemical industry, energy development, environmental protection and other fields. As a new type of sludge dewatering method, the effectiveness of biological enzyme has been proved, and the use of lysozyme engineering bacteria can convert difficult-to-degrade high molecular organic matter into small molecules that are easy to degrade, which is expected to reduce the organic matter in printing and dyeing sludge.

[0004] China's core advantage industry photovoltaic technology has significant advantages in the global market, and the cost of photovoltaic cells is getting lower and lower. Solar energy utilization technology provides a new idea for printing and dyeing sludge drying, and the time is very mature to use inexhaustible solar energy as drying energy.

[0005] Near-infrared heating technology, as an efficient and environmentally friendly energy choice, has shown its significant advantages in various fields. This technology relies on the absorption of near-infrared light by substances, where molecules and atoms vibrate by absorbing photons of specific wavelengths, causing a temperature rise. The efficiency of this heating method lies in the rapid conversion and propagation of energy, achieving fast and uniform heating while allowing precise temperature control and reducing energy waste. Compared with traditional heating methods, near-infrared heating not only converts energy into heat more efficiently but also provides uniform heating, avoiding the problem of local overheating, making it suitable for applications with strict requirements for temperature uniformity. In addition, as non-ionizing radiation, infrared light is friendly to the human body and the environment, with high safety, suitable for various environments including medical, industrial production, and scientific research. Therefore, near-infrared heating technology plays an increasingly important role in modern science and technology and industrial applications due to its high efficiency, energy saving, precision, and safety. Near-infrared treatment of sludge and its organic matter has the advantages of energy saving and efficiency (energy saving rate of more than 95% compared with traditional heating), strong penetration (penetration rate reaching 200% of traditional microwaves), degradation of organic matter (organic matter loss rate of more than 60%, thus basically no foul odor is generated), high-temperature sterilization (cell wall rupture, protein destruction), etc.

[0006] Near-infrared light initiators often use nanoparticles in the near-infrared drying process. The organic matter on the surface of nanoparticles and the macromolecular solid organic matter in sludge can tightly bind to form targeted substances. In addition, nanoparticles themselves have strong near-infrared absorption capacity. During the near-infrared treatment process, the temperature around the targeted substances rises quickly, significantly accelerating the sludge treatment rate and greatly enhancing the effect of near-infrared drying.

[0007] According to the strategic needs of the country for sludge stabilization, harmlessness, reduction, and resource development, it is necessary to fully utilize the useful components in sludge, turn waste into treasure, and treat waste with waste, and take the road of sludge resourceization. The development direction of sludge treatment and disposal technology in the world today is to turn waste into treasure and treat waste with waste, and to take the road of sludge resourceization. The ecological safety disposal technology of sludge is an important guarantee prerequisite for promoting sludge disposal and resourceization. Therefore, through the implementation of key technologies for urban sewage sludge disposal and high-value utilization, a set of key technologies and equipment suitable for current urban sludge treatment technology research and development, equipment development, and engineering application is formed, which is an important measure to promote sludge treatment and resourceization and harmlessness in China, and one of the important measures to realize national energy saving and emission reduction.

[0008] Dyeing and printing sludge and its organic matter, characterized by their large quantity, complex composition, and severe pollution, have become a hot and focal issue in the current ecological environment. This involves scientific problems such as porous media transport processes, interfacial phenomena, phase transitions, and biochemical reactions. Solving this problem requires interdisciplinary collaboration and comprehensive research involving environmental engineering, chemical engineering, bioengineering, and environmental geochemistry to address this increasingly serious global issue of sludge treatment. Therefore, this patent addresses the urgent needs and technological bottlenecks in the national strategy for sludge treatment and disposal by designing a photovoltaic-driven near-infrared targeted drying method and device for the biological treatment of dyeing and printing sludge. This method achieves rapid and harmless sludge treatment while balancing treatment costs and environmental benefits, realizing high-value utilization of sludge. Developing high-value utilization of sludge is a powerful guarantee for achieving coordinated economic, social, and environmental development and an inevitable choice for pursuing a sustainable development path. Summary of the Invention

[0009] The technical problem to be solved by the present invention is to provide a method and apparatus for near-infrared targeted drying of dyeing and printing sludge driven by photovoltaic cells, in response to the above problems and requirements.

[0010] To solve the above technical problems, the present invention adopts the following technical solution:

[0011] A photovoltaic-driven near-infrared targeted drying method for the biological treatment of dyeing and printing sludge includes the following steps:

[0012] Step 1: Add 0.1-2 parts by weight of lysozyme engineered bacteria to 100 parts by weight of dyeing and printing sludge, and pretreat the sludge at room temperature for one week to obtain pretreated dyeing and printing sludge.

[0013] Step 2: Place the solar power generation device of the preparation apparatus in an outdoor environment with sufficient sunlight;

[0014] Step 3: Add 0.01-2 parts by weight of near-infrared photoinitiator, 0.1-2 parts by weight of oxidant and 1-3 parts by weight of heavy metal curing agent to 100 parts by weight of the dyeing sludge treated in Step 1, mix and stir evenly, and then place it on the conveyor belt of the preparation device.

[0015] Step 4: Start the iron-chromium-aluminum alloy near-infrared resistance wire and exhaust fan of the preparation device to heat and dry the sludge on the conveyor belt;

[0016] Step 5: After drying is complete, the conveyor belt is started to transport the dried sludge to the sludge collection bin.

[0017] Compared with the prior art, the present invention, by adopting the above technical solution, has the following advantages:

[0018] The energy for the mechanism's power and near-infrared drying processes in this invention is entirely derived from sunlight, converting unstable solar energy into stable near-infrared energy. The near-infrared optical initiator fully integrates with the organic matter in the sludge system, and the upper and lower layers of near-infrared resistance wires target and dry the sludge system, accelerating the drying process. Lysozyme-engineered bacteria promote the dissolution of extracellular polymers in the sludge to reduce the carbon content of the dyeing sludge, initially reducing the organic matter content. The oxidant destroys the cell structure of microorganisms, resulting in the significant degradation and catalytic oxidation of sludge organic matter. The heavy metal solidifying agent solidifies heavy metals in the sludge. Ultimately, the moisture content in the sludge is reduced by more than 95%, and the organic matter by more than 60% (with virtually no residual active organic matter, and the residue is non-combustible). The entire process offers advantages such as energy efficiency, strong penetration, degradation of organic matter, and high-temperature sterilization. This invention includes an exhaust fan to extract the continuous moisture during the drying process. It also includes an industrial interface and a main / backup power conversion switch for switching between the solar battery pack and industrial power supply modes during prolonged periods of cloudy or rainy weather, ensuring the drying process is not affected by extreme weather. A temperature display is also provided to monitor the real-time temperature of the drying mechanism, making it easy to adjust the heating temperature and time.

[0019] Furthermore, the stirring time in step 1 is 15 minutes, the amount of lysozyme engineered bacteria added is 0.1-2 parts by weight, and the sludge is pretreated biologically at room temperature for one week.

[0020] The beneficial effects of adopting the above-mentioned further scheme are as follows: biological enzymes, as a new and effective method for sludge dewatering, have proven their effectiveness. The use of engineered lysozyme bacteria can transform recalcitrant high-molecular organic matter into small, easily degradable molecules, promote the dissolution of extracellular polymers in sludge, and reduce the carbon content of dyeing and printing sludge. The organic matter content of dyeing and printing sludge after biological pretreatment is reduced by about 20%.

[0021] Furthermore, the near-infrared photoinitiator in step 3 is any one or both of silicon nanoparticles and metal nanoparticles.

[0022] The beneficial effects of adopting the above-mentioned further scheme are as follows: This invention targets the characteristics of active organic matter, inert organic matter, and heavy metals in sludge. It introduces a photoinitiator with strong near-infrared light absorption, stable chemical properties, and low cost into the biologically pretreated dyeing and printing sludge. The organic matter commonly found on the surface of nanoparticles and the large molecular solid organic matter in the sludge can tightly bind together to form a targeted substance. When these nanoparticles are irradiated with near-infrared light, a plasmonic resonance phenomenon occurs on their surface, resulting in a strong electric field and heat generation. This allows near-infrared energy to be efficiently focused around the targeted substance, achieving near-infrared targeted heating and drying, significantly improving the sludge treatment rate. Furthermore, the metal nanoparticles also possess the ability to inhibit bacterial activity, mainly through charge interaction with bacterial cells, disrupting their membranes and walls, interfering with charge exchange, leading to DNA chain breaks, and interfering with ribosome assembly and enzyme activity. Simultaneously, the metal nanoparticles can increase the oxidative stress activation of bacteria, damaging their protein, lipid, and DNA structures, achieving sterilization and disinfection effects.

[0023] Furthermore, the oxidant in step 3 is sodium hypochlorite.

[0024] The beneficial effect of adopting the above-mentioned further approach is that the use of sodium hypochlorite oxidant can induce the breaking of carbon-carbon bonds in organic molecules, decomposing the organic molecules into smaller fragments. These fragments are usually further oxidized to form inorganic products such as salts or carbon dioxide, further reducing the organic matter content of the sludge.

[0025] Furthermore, the heavy metal curing agent in step 3 is any one or both of calcium hydroxide and calcium sulfide.

[0026] The beneficial effects of adopting the above-mentioned further scheme are as follows: The main heavy metals contained in the sludge system are lead (26.52 mg / Kg), nickel (37.29 mg / Kg), chromium (1325.12 mg / Kg), zinc (614.89 mg / Kg), copper (129.13 mg / Kg), manganese (10.65 mg / Kg), and cadmium (4.01 mg / Kg), among which chromium, zinc, and copper have the highest content. Using calcium hydroxide and calcium sulfide, through a series of chemical reactions, the heavy metal ions are combined with the active substances in these compounds, converting the heavy metal ions into stable solid precipitates that are insoluble in water. This fixes the heavy metal ions from the aqueous solution, reducing their toxicity and environmental pollution. It not only further solidifies the heavy metals in the sludge but also reduces organic matter.

[0027] Furthermore, the thickness of the dyeing sludge mixture on the conveyor belt is 5-10 mm.

[0028] Furthermore, in step 4, the heating temperature of the iron-chromium-aluminum alloy near-infrared resistance wire is 1000 degrees Celsius, and the heating time is 300-600 seconds.

[0029] Furthermore, each layer of the refractory microporous perforated conveyor belt is provided with iron-chromium-aluminum alloy near-infrared resistance wires on its upper and lower surfaces.

[0030] The advantages of adopting the above-mentioned further solution are: the near-infrared heating power and time can be determined according to the total amount of sludge to be treated and the required amount. The refractory microporous perforated conveyor belt can withstand the high temperature of approximately 1000 degrees Celsius during near-infrared heating and drying, and the microporous perforated design ensures that both the upper and lower surfaces of the sludge are subjected to the near-infrared high-temperature drying effect. The number of near-infrared resistance wires to be activated can be determined according to the total amount of sludge to be treated and the required amount.

[0031] A photovoltaic-driven near-infrared targeted drying device for the biological treatment of dyeing and printing sludge includes a heating furnace outer casing, iron-chromium-aluminum alloy near-infrared resistance wires, refractory microporous perforated conveyor belts, a solar power generation device, an exhaust fan, a storage battery, and a sludge collection bin. The heating furnace outer casing contains multiple layers of refractory microporous perforated conveyor belts arranged horizontally and evenly from top to bottom. These conveyor belts transport sludge from the inlet to the sludge collection bin at the outlet. Above each layer of the conveyor belt is an iron-chromium-aluminum alloy near-infrared resistance wire, which heats the sludge on the conveyor belts. An exhaust fan is also installed inside the heating furnace outer casing to ventilate the area during the heating process. The solar power generation device generates solar power and stores electrical energy in the storage battery, which supplies power to the iron-chromium-aluminum alloy near-infrared resistance wires, the refractory microporous perforated conveyor belts, and the exhaust fan.

[0032] Furthermore, the distance between the iron-chromium-aluminum alloy near-infrared resistance wire and the surface of the fire-resistant microporous perforated conveyor belt is 50-70mm. Attached Figure Description

[0033] Fig. 1 This is a schematic diagram of the method flow of the present invention.

[0034] Fig. 2 This is a schematic diagram of the overall structure of the device of the present invention;

[0035] Fig. 3 This is a front view of the heating furnace.

[0036] The components represented by each number in the diagram are listed below:

[0037] 1. Iron-chromium-aluminum alloy near-infrared resistance wire; 2. Ventilation base plate; 3. Heating furnace outer casing; 4. Industrial socket; 5. Exhaust fan; 6. Fire-resistant microporous perforated conveyor belt; 7. Temperature measuring instrument; 8. Stepper motor; 9. Storage compartment; 10. Photovoltaic panel; 11. Photovoltaic bracket; 12. Voltage detector; 13. Photovoltaic controller; 14. Lead-acid battery; 15. Inverter; 16. Main and auxiliary power supply switching switch; 17. Distribution box. Detailed Implementation

[0038] The principles and features of the present invention are described below with reference to the accompanying drawings. The examples given are only for explaining the present invention and are not intended to limit the scope of the present invention.

[0039] Near-infrared heating is the process of heating objects using electromagnetic radiation within the near-infrared spectrum. Near-infrared light has a specific wavelength range (approximately 700 nanometers to 2500 nanometers), within which photons have sufficiently high energy to excite vibrations, rotations, and electron transitions in molecules and atoms, thereby generating heat in the object. The characteristics of near-infrared heating are as follows:

[0040] a. High efficiency and rapid heating. Near-infrared light has a high energy transfer efficiency, which can quickly transfer energy to objects, achieving rapid heating. This is highly advantageous for processes requiring high efficiency, such as processing and drying.

[0041] b. Deep Penetration. Near-infrared light can penetrate deeply into dyeing sludge, allowing it to heat the interior of the object rather than just the surface. Regardless of the shape of the object, near-infrared light can generally penetrate evenly to generate heat. Therefore, uniformity is greatly improved. This avoids the phenomena of the outside being burnt while the inside is still raw, or the outside being dry while the inside is wet.

[0042] c. Controllable Selectivity. The absorption characteristics of near-infrared light can be adjusted through material selection and processing to achieve selective heating of specific components. Near-infrared radiation has different effects on materials with different properties. Because water molecules absorb near-infrared radiation best, areas with high water content absorb more near-infrared power than areas with low water content. Water in a material absorbs near-infrared radiation more strongly than dry matter, so water heats up more than dry matter. This promotes the rise in water temperature and facilitates water evaporation, while also promoting overheating of dry matter. This is extremely beneficial for minimizing the destruction of nutrients and flavor. The characteristics of selective heating include: automatic equilibrium absorption of near-infrared radiation, preventing charring during material heating and drying.

[0043] d. Energy-efficient and high-performance. Near-infrared light is highly efficient in energy transfer. The energy of photons can be directly absorbed and converted into heat energy, reducing energy waste. During near-infrared heating, the object being heated is generally placed in a specific heating chamber. The heating chamber is a closed cavity for near-infrared light, so it does not easily leak out, resulting in minimal external heat loss. The heat is absorbed only by the heated object, leading to extremely high thermal efficiency. Simultaneously, the introduction of photovoltaic power generation mechanisms, such as solar cell arrays and solar battery packs, significantly reduces electricity consumption. Therefore, it is energy-saving and power-efficient, typically saving 80%–99% in areas with ample sunlight.

[0044] e. Easy to control. Temperature sensors, infrared temperature displays, and other monitoring devices are used to monitor temperature changes in the heating zone in real time. Based on real-time data, microcomputer control can be applied to automatically monitor product quality, making it particularly suitable for automated control of the heating process and heating specifications to maintain the target temperature. Combined with modern data acquisition and remote monitoring technologies, the heating process can be monitored in real time, and control parameters can be remotely adjusted as needed to ensure heating stability and effectiveness.

[0045] f. Improved working conditions and reduced floor space. Photovoltaic cell systems can be distributed in various locations, including buildings, factories, and farmland, generating electricity near energy demand points and reducing energy transmission losses. Near-infrared heating systems typically do not require large heat transfer surfaces, which reduces the size and floor space required for heating equipment. Therefore, working conditions are greatly improved, and the compact equipment structure saves factory space.

[0046] g. Low maintenance costs. Photovoltaic systems typically have low maintenance costs. Once installed, there are few other significant maintenance requirements besides regular cleaning and inspection.

[0047] Near-infrared sludge and organic matter treatment offers advantages such as energy efficiency (energy saving rate exceeding 95% compared to traditional heating), strong penetration (penetration rate reaching 200% of traditional microwaves), organic matter degradation (organic matter loss rate exceeding 60%, resulting in virtually no foul odor), and high-temperature sterilization (cell wall disruption and protein destruction). Near-infrared photoinitiators are often nanoparticles. The organic matter commonly found on the surface of nanoparticles can tightly bind with the large molecular solid organic matter in the sludge, forming a targeted substance. Furthermore, nanoparticles themselves possess extremely strong near-infrared absorption capabilities. During near-infrared treatment, the area around the targeted substance heats up rapidly, significantly accelerating the sludge treatment rate and greatly enhancing the near-infrared drying effect. Simultaneously, during near-infrared treatment, the exhaust gas mainly consists of easily collectable and reusable low-molecular-weight harmless substances, with no radiation residue, making it a very safe and harmless high-tech process.

[0048] Bioenzymes are among the most promising cutting-edge biotechnologies, with wide applications in biology, medicine, agriculture, food, chemical engineering, energy development, and environmental protection. As a novel and effective method for sludge dewatering, the effectiveness of bioenzymes has been proven. Using engineered lysozyme bacteria can transform recalcitrant high-molecular-weight organic matter into smaller, more easily degradable molecules, promoting the dissolution of extracellular polymers in sludge and reducing the carbon content of dyeing and printing sludge. After biological pretreatment, the organic matter content of dyeing and printing sludge is reduced by approximately 20%.

[0049] like Figs. 1-3 As shown, this invention relates to a photovoltaic cell-driven near-infrared targeted drying method and apparatus for biological treatment of dyeing and printing sludge. The apparatus mainly includes an iron-chromium-aluminum alloy near-infrared resistance wire 1, a hollowed-out base plate 2, a drying furnace outer box 3, an industrial interface 4, an exhaust fan 5, a refractory microporous hollowed-out conveyor belt 6, a temperature display 7, a motor 8, a sludge collection bin 9, a solar cell array 10, a support frame 11, a voltage detector 12, a photovoltaic controller 13, a solar battery pack 14, an inverter 15, a main / backup power conversion switch 16, and a distribution box 17.

[0050] The near-infrared resistance wires of the iron-chromium-aluminum alloy consist of 5 layers, with 8 wires in each layer. Each wire is 1.5m long, 0.2mm in diameter, and has a power of 100W, and is located on the upper and lower sides of the conveyor belt. The perforated base plate is located at the bottom of the heating furnace. The outer casing of the drying furnace is 2.5m long, 1.5m wide, and 1.5m high, and is made of high-temperature resistant ceramic. The industrial interface and exhaust fan are located on the right side of the outer casing of the drying furnace. The refractory microporous perforated conveyor belt consists of 4 layers, with 1 belt in each layer. Each belt is 3m long and 1.3m wide and is located inside the heating furnace. The temperature display is located on the top of the outer casing of the drying furnace. There are 4 motors, located at one end of each conveyor belt. The sludge collection bin is located on the left side of the outer casing of the drying furnace. The solar cell array and support are placed in an outdoor environment with sufficient sunlight. The voltage detector, photovoltaic controller, solar battery bank, inverter, main / backup power conversion switch, and distribution box are connected to the solar cell array in sequence and are placed in an indoor environment.

[0051] The iron-chromium-aluminum alloy near-infrared resistance wire is used to heat and dry the dyeing and printing sludge; the perforated base plate is used for ventilation and drainage; the exhaust fan is used to extract moisture during the heating and drying of the sludge; the refractory microporous perforated conveyor belt is used for rolling and conveying the dyeing and printing sludge; the temperature display is used to monitor the temperature of the heating furnace; the motor is used to drive the conveyor belt to roll; the sludge collection bin is used to collect the processed dried sludge; the solar cell array is used to collect solar energy and convert it into electrical energy for storage in a solar battery pack; the bracket is used to support the solar cell array; the voltage detector is used to detect the solar energy received by the solar cell array. The power, current, voltage, and discharge voltage of the solar battery pack are specified; the photovoltaic controller is used to step down the voltage to charge the solar battery pack; the solar battery pack is used to store the electrical energy converted from solar energy collected by the solar cell array, and to provide energy for the movement of the refractory microporous perforated conveyor belt and the heating of the iron-chromium-aluminum alloy near-infrared resistance wire; the inverter is used to increase the voltage released by the solar battery pack to 220V; the main and backup power conversion switch is used for free switching between solar power supply and industrial power supply; the distribution box is used to distribute a portion of the electrical energy to drive the motor and drive the conveyor belt, and a portion to drive the heating of the near-infrared resistance wire.

[0052] This invention provides a photovoltaic cell-driven near-infrared drying method for the biological treatment of dyeing and printing sludge, comprising the following steps:

[0053] Step 1: Add 0.1-2 parts by weight of lysozyme engineered bacteria to 100 parts by weight of dyeing and printing sludge, and pretreat the sludge at room temperature for one week to obtain pretreated dyeing and printing sludge.

[0054] Step 2: Place the solar cell array in a sunny outdoor environment;

[0055] Step 3: Add 0.01-2 parts by weight of near-infrared photoinitiator, 0.1-2 parts by weight of oxidant, and 1-3 parts by weight of heavy metal curing agent to 100 parts by weight of the dyeing sludge treated in Step 1.

[0056] Step 4: Mix the dyeing and printing sludge with the near-infrared photoinitiator, oxidant, and heavy metal curing agent added in Step 2.

[0057] Step 5: Turn on the power supply of the solar battery pack and the power supply of the exhaust fan to drive the near-infrared light drying mechanism, heat the near-infrared resistance wire to about 1000 degrees, and put the sludge with a thickness of 1-5mm into the surface of the near-infrared light drying mechanism conveyor belt and heat it for 300-600 seconds.

[0058] Step 6: The conveyor belt rolls, transporting the dried sludge to the sludge collection bin. All power is turned off, and the sludge drying process is complete.

[0059] Existing sludge treatment methods generally involve analytical experiments, with a sludge volume of about 30 ml, mainly used to determine the content of heavy metals and organic matter in the sludge. The heating furnace used for analysis has an inner cavity of only 2-3 L and a heating power of about 700 W.

[0060] The drying process of this invention is entirely powered by sunlight, making it more efficient, cheaper, non-toxic, and environmentally friendly compared to traditional sludge drying methods. By adding engineered lysozyme bacteria and a near-infrared optical initiator, and through biological pretreatment and near-infrared targeted drying, the organic matter in the sludge is reduced by more than 60% (with virtually no residual active organic matter, and the residue is non-combustible), and the moisture content is reduced by more than 95%, achieving sterilization and disinfection. The entire process boasts advantages such as energy efficiency, strong penetration, degradation of organic matter, and high-temperature sterilization.

[0061] This invention uses a near-infrared heating furnace with an inner cavity of 750L-3000L. The amount of sludge used each time is about 2000L, and the heating time is 5-10 minutes with a power of up to 4000W.

[0062] The above description provides examples of the preferred embodiments of the present invention. Parts not detailed herein are common knowledge to those skilled in the art. The scope of protection of the present invention is determined by the claims. Any equivalent modifications based on the technical teachings of the present invention are also within the scope of protection of the present invention.

Claims

1. A method for the bio-treatment of printing and dyeing sludge by photovoltaic cell driven near-infrared targeted drying, characterized in that, It comprises the following steps: Step 1, 0.1-2 parts by weight of lysozyme engineering bacteria are added to 100 parts by weight of printing and dyeing sludge, and the sludge is biologically pretreated at room temperature for one week to obtain pretreated printing and dyeing sludge; Step 2, the solar power generation device of the preparation device is placed in an outdoor environment with sufficient sunlight; the preparation device comprises a heating furnace outer box, an iron-chromium-aluminum alloy near-infrared resistance wire, a refractory microporous hollow conveying belt, a solar power generation device, an exhaust fan, a storage battery and a sludge collection bin; a plurality of layers of refractory microporous hollow conveying belts are uniformly arranged in the heating furnace outer box from top to bottom; the refractory microporous hollow conveying belt is used to convey the sludge from the inlet end of the heating furnace outer box to the sludge collection bin at the outlet end; an iron-chromium-aluminum alloy near-infrared resistance wire is arranged above each layer of the refractory microporous hollow conveying belt, which is used to heat the sludge on the refractory microporous hollow conveying belt; an exhaust fan is further arranged in the heating furnace outer box, which is used to exhaust air when the iron-chromium-aluminum alloy near-infrared resistance wire is heated; the solar power generation device is used for solar power generation and stores electrical energy by using a storage battery; the storage battery is used to supply power to the iron-chromium-aluminum alloy near-infrared resistance wire, the refractory microporous hollow conveying belt and the exhaust fan; Step 3, 0.01-2 parts by weight of near-infrared light initiator, 0.1-2 parts by weight of oxidizing agent and 3-6 parts by weight of heavy metal curing agent are added to 100 parts by weight of the printing and dyeing sludge treated in step 1, and then stirred uniformly and placed on the conveying belt of the preparation device; the near-infrared light initiator of step 3 is any one or both of silicon nanoparticles and metal nanoparticles; Step 4, start the iron-chromium-aluminum alloy near-infrared resistance wire and the exhaust fan of the preparation device to heat and dry the sludge on the conveying belt; Step 5, after drying, the conveying belt is started to convey the dried sludge to the sludge collection bin.

2. The bio-remediation of dyeing sludge by photovoltaic cell driven near infrared targeted drying method according to claim 1, characterized in that, The oxidizing agent of step 3 is sodium hypochlorite.

3. The dyeing sludge biotreatment photovoltaic cell driven near infrared targeted drying method according to claim 1, characterized in that, The heavy metal curing agent of step 3 is any one or both of calcium hydroxide and calcium sulfide.

4. The dyeing effluent sludge biotreatment photovoltaic cell driven near infrared targeted drying method according to claim 1, characterized in that, The thickness of the printing and dyeing sludge mixture on the conveying belt is 5-10 mm.

5. The dyeing sludge biotreatment photovoltaic cell driven near infrared targeted drying method according to claim 1, characterized in that, The heating temperature of the iron-chromium-aluminum alloy near-infrared resistance wire in step 4 is 1000 degrees, and the heating time is 300-600 seconds.

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