China Net/China Development Portal News The prevention and control of urban solid waste pollution NZ Escorts is to improve the quality of water, atmosphere and soil environment, strengthen It is an inevitable requirement to prevent environmental risks and an important guarantee for maintaining human health. my country’s urban solid waste pollution prevention and control work started late, has a weak foundation, and has many historical debts. There are still obvious deficiencies in the prevention and control of urban solid waste pollution, and the environmental risks we face are still severe. However, urban solid waste contains abundant recyclable materials and energy. If it can be used cleanly and efficiently, it will not only help solve the major pollution problem of urban solid waste in our country, but also be an important breakthrough to alleviate the bottleneck of resource and energy shortage in our country. In addition, realizing the effective recycling of urban solid waste resources can not only improve China’s resource recycling efficiency, but also reduce the impact of my country’s economic development on primary resources. It can ensure national resource security and alleviate the resource constraints that may be faced in achieving the goal of carbon neutrality. General Secretary Xi Jinping has made important instructions on developing a circular economy and promoting the disposal and utilization of urban solid waste on many occasions. The report of the 20th National Congress of the Communist Party of China proposed “accelerating the construction of a waste recycling system” and “actively and steadily promote carbon peak and carbon neutrality” and other important instructions. strategic deployment, and emphasizes the implementation of a comprehensive conservation strategy and promotes the conservation and intensive use of various resources. Therefore, the comprehensive utilization of waste resources is one of the important ways for my country to deeply implement the sustainable development strategy, establish and improve the green low-carbon circular development economic system, and achieve the goals of carbon peak and carbon neutrality (hereinafter referred to as “double carbon”).
At present, my country’s urban solid waste has wide sources, large quantities, and many types, and its comprehensive disposal models are mostly decentralized and single. Under this model, on the one hand, it is difficult for various urban solid waste disposal units to achieve optimal resource and energy efficiency through the coordination of material and energy metabolism. On the other hand, it is not conducive to the implementation of the entire life cycle of urban solid waste disposal by various management departments. Refined supervision. Developed countries and regions such as the United States, Japan, and the European Union have systematically deployed a new round of circular economy action plans, deeply integrated digital, biological, energy, material and other cutting-edge technologies, and reconstructed intellectual property and standards systems, forming a group of monopolistic enterprises. The core technology and equipment of circular economy. The overall technology and process research of my country’s circular economy has been close to the international advanced level as a whole, and some have reached the international advanced level. However, there is still a big gap in the whole process of source reduction and harm reduction, and high-quality recycling. Therefore, this article systematically sorts out the comprehensive disposal methods of urban solid waste in my country and its existing problems, especially the major challenges faced in the “double carbon” context, and relies on the strategic leading science and technology project (Category A) of the Chinese Academy of Sciences “Beautiful China”. With the support of the “Ecological Civilization Construction Science and Technology Project” (hereinafter referred to as the “Beautiful China Special Project”) and other projects, a circular economic disposal model of urban multi-source solid waste characterized by centralization, resource-based, green and intelligent was proposed and constructed;Taking the construction of Dongguan Haixinsha National Resource Recycling Demonstration Base (hereinafter referred to as “Haixinsha Base”), the only national resource recycling base located in the Guangdong-Hong Kong-Macao Greater Bay Area, as an example, it elaborates on the integration of existing domestic waste Based on incineration power generation, safe incineration of hazardous waste and other projects, how to break through the collaborative pyrolysis carbonization of incineration fly ash-dining kitchen residue-municipal sludge, electronic sludge-waste catalyst-waste activated carbon collaborative smelting metal enrichment, and full-process metabolism The development and integrated application of a series of key technologies, equipment, software and hardware systems for intensive co-processing of solid waste, such as simulated digital twins, can significantly improve the comprehensive resource and energy recovery efficiency of the demonstration base and reduce the comprehensive impact on the regional environment. In this way, it provides new models and paths for our country to fundamentally solve the complex problem of solid waste and promote the realization of waste-free cities and “double carbon” goals.
Current status, problems and challenges of urban multi-source solid waste disposal
Urban solid waste can be divided into broad and narrow senses. The academic community generally adopts the narrow sense concept. It specifically refers to the solid waste (municipal solid waste) generated in people’s daily activities, which mainly includes residential waste, commercial waste and cleaning waste, as well as feces and sewage plant sludge. In addition, various metals and plastics from domestic waste are classified and recycled. , paper scraps and other waste products also fall into this category. Urban solid waste in a broad sense refers to solid, semi-solid, and gaseous materials placed in containers that have lost their original use value or have been abandoned or abandoned although they have not lost their use value during production, life and other activities. , as well as items and substances that are included in waste management according to laws and regulations Zelanian Escort, generally including municipal domestic waste, urban construction waste, general industrial solid waste and Four categories of hazardous solid waste. The field of engineering technology generally adopts the concept of urban Zelanian Escort solid waste in a broad sense, especially for my country’s current “waste-free city” and “waste-free society” The construction goal requires the overall consideration of organic solid waste from urban domestic sources, urban mineral solid waste, general and hazardous waste from industrial sources for co-processing.
Energy-based disposal of organic solid waste from domestic sources
Domestic organic solid waste mainly refers to kitchen waste, catering waste and urban sludge generated in human production and life. It has the characteristics of complex composition, high moisture content, and easy corruption; the traditional disposal method of organic solid waste is Landfilling and incineration are mainly used, and technologies for collaborative utilization of resources and energy such as anaerobic fermentation are developing rapidly. Developed countries are still at a disadvantage in terms of core technologies and equipment in this field.With a leading position, its research on organic solid waste treatment has developed from traditional reduction, resource utilization and harmlessness to in-depth resource utilization, intelligence and energy, and has gradually formed the energy utilization of organic solid waste biological resources and various A comprehensive treatment model for collaborative treatment of organic solid waste and high-parameter intelligent power generation.
my country has implemented a strategy to promote the recycling of organic solid waste resources from domestic sources to cope with the resource shortage problems caused by rapid industrialization and urbanization. However, compared with developed countries, its resource energy utilization is still lagging behind. There is a certain gap. Basic research on organic solid waste incineration in my country started late, with insufficient original innovation capabilities. Existing technologies mainly rely on introduction, digestion and re-innovation. After 30 years of development, although the overall operation level of the system has approached the international advanced level, there are still shortcomings in aspects such as power generation efficiency, intelligent control, and pollution emissions. In the field of resource utilization technology of domestic organic solid waste such as anaerobic fermentation, key issues such as low gas production rate, low gasification tar disposal rate, and low biogas power generation efficiency have not been completely solved in my country. For example, in the dry fermentation technology that is vigorously promoted internationally, my country still has obvious deficiencies in terms of stability, continuity, and gas production efficiency.
Resource Disposal of Urban Mineral Solid Waste
Urban Minerals “I understand, mom is not just doing a few boring things to pass the time, there is no need for you to say “It mainly refers to the recyclable resources such as steel, metal, plastic and rubber produced and contained in urban solid waste, which have significant economic and environmental value attributes. Developed countries have made breakthrough progress in the intelligent dismantling and high-end remanufacturing of urban mineral waste products, comprehensive recovery and recycling of new energy devices, and efficient and environmentally friendly pyrolysis and resource recovery of organic-inorganic composite materials. For example, Germany has formed a complete management system and technical guarantee in the fields of high-speed rail and aviation engine dismantling, recycling and remanufacturingZelanian Escort; The Belgian company Umicore uses a special shaft furnace to achieve efficient dissociation of waste ternary lithium batteries; the high-efficiency pyrolysis oil recovery device developed by Northeastern University in the United States can produce high-value fuel oil.
With the support of the National Development and Reform Commission and the Ministry of Finance, our country has established a number of urban mineral demonstration bases Zelanian Escort land, promoting the construction of my country’s urban mineral solid waste resource recycling system. However, my country still lacks effective ways to recycle waste products and parts with high quality, and the gap with the circular economy driven by foreign digital technology is still very obvious. Especially in the dismantling and utilization of scrapped new energy vehicles, repair of aircraft engine blades, recycling of valuable metals from retired power batteries, intelligent control, compatibility and stable operation of retired composite devices/material pyrolysis equipment, there is an urgent need for high-temperature and ultra-high temperature refining and extraction of secondary resources. Purified, high-purity materials with precise structure and efficiencyThe research and development of some key technologies such as control, as well as the improvement of system integration optimization and advanced process control capabilities.
Zelanian EscortSafe resource disposal of hazardous waste from industrial sources</p Zelanian EscortPoint. Hazardous waste from industrial sources is mainly disposed of in safe ways such as landfill, incineration and physical chemical treatment. For example, cement kiln co-processing, as a typical industrial hazardous waste recycling technology, can achieve harmless disposal of hazardous solid waste while producing cement clinker. In this field, developed countries have achieved a fundamental transformation from single resource utilization to multi-resource cross-industry quality-based collaboration and large-scale value-added utilization by building a multi-industry collaborative utilization model of complex and difficult-to-use industrial solid waste/hazardous waste. The molten pool collaborative smelting technology represented by the Belgian company Umicore can process dozens of types of electronic waste and recover 17 valuable metals at the same time; the American Rare Earth Company uses membrane-assisted extraction technology to recycle NdFeB and other waste materials to achieve comprehensive recycling of rare earths The rate is over 95%.
After years of development, our country has basically formed a pattern in which multiple methods coexist with “common disposal technology as the mainstay, vigorously developing multi-source solid waste recycling and collaborative disposal technology”, and has basically realized the coexistence of hazardous waste Standardized and harmless management. However, resource recovery technology for hazardous waste from emerging industries, especially hazardous waste containing strategic metals, is relatively lacking. In terms of urban multi-source metal-containing solid/hazardous waste collaborative smelting technology, materials, core components, and high-end equipment, there is a clear gap between my country and the international advanced level. Different types of strategic emerging industry waste short-process in-depth separation – refining and smelting – product value-added purification Utilization is the main direction in the future.
Problems and challenges under the green low-carbon cycle system
Under the guidance of a series of national policies related to solid waste resources and environment, my country has basically achieved the general The energy and resource utilization of solid waste and the harmless disposal of hazardous waste reduce the environmental impact and health risks caused by the solid waste treatment and disposal process. However, in the process of accelerating urbanization and rapid industrial transformation and upgrading, especially under the requirements of my country’s new policies on green recycling, pollution reduction and carbon reduction, it is far from achieving the goals of comprehensive collaborative management of multi-source solid waste and efficient resource conservation and recycling. Waste recycling “Okay, I will ask my mother to come find you later, and I will let you go free.” Lan Yuhua nodded firmly. There are still some challenges in utilizing the system.
There is no consensus on collaborative disposal. Management of different types of solid waste in my countryIt is under the jurisdiction of different departments and cannot be unified and coordinated, so it is difficult to implement coordinated disposal of urban multi-source solid waste. In addition, because government departments have certain differences in macro-control and market competition balance regarding the solid waste disposal industry, it is difficult to reach a consensus on collaborative disposal of multi-source solid waste.
The management policy system needs to be improved. Our country has issued many policy documents related to solid waste management and pollution prevention, and has initially formed a relatively complete solid waste management system at the national level. However, most regions have yet to combine their own industrial characteristics and environmental management status to formulate comprehensive solid waste utilization and treatment solutions that are regionally applicable and operable, especially digital management systems such as “Internet +” and intensive collaborative links. There are still certain deficiencies in the construction of technical systems.
The disposal and utilization capacity is unbalanced. In recent years, comprehensive disposal NZ Escorts projects of urban hazardous waste incineration, landfilling, and cement kiln coordination have been built in various parts of the country. From a national perspective, treatment capacity has basically reached saturation, but the imbalance of regional development has led to large gaps in hazardous waste treatment capacity in some areas. In some areas, especially in cities with a high level of urbanization and industrialization on the eastern coast, the completed Newzealand Sugar hazardous waste comprehensive utilization project has been affected by unreasonable competition in the market. , as well as issues such as policy barriers to inter-provincial transfers, making it impossible to achieve profitable and healthy development.
The level of high-value intelligent utilization is low. At present, my country’s bulk industrial solid waste is mainly used to produce mid- to low-end building materials products, and there is a lack of high-value utilization product conversion technology supported by advanced technology and equipment, especially metal-containing industrial solid waste; while urban mineral solid waste Zelanian sugar waste also faces the same dilemma, which will become an important issue restricting the secondary development, utilization and safe reserve of my country’s strategic metal resources in the future.
The “Beautiful China Special Project” supports the construction of Haixinsha Base
The Guangdong-Hong Kong-Macao Greater Bay Area is a world-class project planned and built during the country’s “13th Five-Year Plan” urban agglomeration. Systematically carrying out efficient recycling of multi-source urban solid waste and collaborative intelligent control of pollution in the Guangdong-Hong Kong-Macao Greater Bay Area is not only a practical need for industrial transformation and upgrading of solid waste pollution control in key areas, but also a strategy to serve and support the establishment of my country’s resource recycling system need. Based on this, the “Guangdong-Hong Kong-MacaoNewzealand Sugar Greater Bay Area Urban Agglomeration Ecological Construction Project and Ecosystem Intelligent Management Demonstration” in the “Beautiful China Special Project”The project has specially set up the topic “Integration and Demonstration of Resource Recycling and Green Development Technology and Equipment in Guangdong-Hong Kong-Macao Greater Bay Area Urban Agglomeration”, with a view to building a world-class solid waste harmless in urban agglomeration based on the environmental attributes and characteristics of urban solid waste resources in the Greater Bay Area. Based on the treatment and disposal needs, we will carry out research and development on key common technologies and equipment such as efficient and high-value conversion of domestic waste and other urban organic solid waste and hazardous waste and collaborative pollution control, as well as the design and research of overall solutions for regional resource recycling and intelligent pollution management and control. The integration of the above key common technologies and equipment and the successful application of overall solutions will provide technical support for cracking the “NIMBY effect” of waste disposal, significantly improving the efficiency of urban resource utilization in the Guangdong-Hong Kong-Macao Greater Bay Area, and ensuring the country’s rapid implementation of waste incineration. Strict implementation of safe disposal of ash and efficient, clean and resource utilization of emerging metal-based hazardous wastes.
The Haixinsha base covers an area of 716 acres, with a total investment of approximately 5 billion yuan. It comprehensively processes domestic waste, kitchen waste, and 26 categories of hazardous waste, totaling 1 million tons per year (Figure 1). Since the launch of the “Beautiful China Project” in 2019, the leading unit of the “Guangdong-Hong Kong-Macao Greater Bay Area Urban Agglomeration Resource Recycling and Green Development Technology and Equipment Integration and Demonstration” project, the Institute of Process Engineering of the Chinese Academy of Sciences, has teamed up with the Institute of Urban Environment of the Chinese Academy of Sciences to focus on the base. According to the actual needs of project construction, the recycling of organic solid waste represented by municipal sludge, kitchen digestate, garbage incineration fly ash, etc., the recycling of urban minerals represented by electronic sludge, waste mineral oil, etc., and The research and development of key technologies and equipment such as intelligent monitoring of the entire process of urban multi-source solid waste recycling supports the construction of a base with a capacity of 130,000 tons/year for electronic sludge fire smelting metal regeneration, 50,000 tons/year waste mineral oil resource recycling, and 1 Four demonstration projects include coordinated resource treatment of 10,000 tons/year fly ash-digest residue-sludge and integrated intelligent management and control of 1 million tons/year urban multi-source solid waste conversion. This will comprehensively support the Haixinsha base’s 1 million-ton urban multi-source solid waste resource recycling integrated demonstration construction, and ultimately form a multi-source solid waste centralized recycling that is suitable for the Guangdong-Hong Kong-Macao Greater Bay Area urban agglomeration and can be promoted nationwide. Utilize and green development system solutions.
Green and efficient conversion of solid waste resources into energy
Key technologies for collaborative utilization of sludge-digest residue-fly ash. The treatment and disposal of urban sludge is the focus of national environmental protection inspections. The anaerobic process of food waste is prone to acidification and produces a large amount of digestate residue that requires secondary treatment. The continuous increase in the amount of waste incineration has led to a rapid increase in fly ash production. In view of the above problems arising from the disposal process of urban domestic solid waste, this study focused on the sludge-The low-carbon collaborative resource utilization of biogas residue and fly ash has broken through relevant technical bottlenecks and achieved a series of technical achievements: the one-time dehydration of sludge or biogas residue with a moisture content of 80% has been reduced to less than 40%; food waste waste grease The conversion rate of bioplastics (PHA) reaches more than 60%; the chemical oxygen demand (COD) removal rate of electrochemically enhanced sludge/food waste hydrothermal microbial anaerobic fermentation reaches more than 85%, and the methane content in biogas reaches the highest level. 90%; sludge and digestate are thermally decomposed at a temperature of about 600°C to obtain biochar solid matter, in which antibiotics are 100% removed, heavy metals are stably solidified by more than 85%, and nitrogen, phosphorus, and potassium in nutrients are about 80%. % is held in biochar; the sludge reduction reaches more than 90%. The chlorine content in the solid-phase pyrolytic carbon after hydrothermal treatment of incineration fly ash and sludge/digest residue is less than 2.0%, and the leaching of heavy metals is reduced. Lan’s mother held her daughter’s confused face and comforted her softly. 85%, dioxin removal rate >99.9%, and the ceramsite prepared by high-temperature sintering meets the requirements of GB/T 17431.2-2010 “Lightweight Aggregates and Test Methods” and achieves the goal of full resource utilization of fly ash (Figure 2a). This technology has completed 10,000-ton industrial demonstration application at Haixinsha Base.
Key technology for fire smelting of copper-containing sludge. The Guangdong-Hong Kong-Macao Greater Bay Area is an important agglomeration area for the development of my country’s electronic information industry. A large amount of copper- and nickel-containing sludge is generated during the wastewater treatment process of metal surface treatment, electroplating, printed circuit boards, and wire and cable production. Through extensive research on small-scale and expanded testing processes in the copper-containing electronic sludge oxygen-enriched smelting laboratory, this study has explored the impact mechanism of key process parameters such as oxygen-enriched concentration and smelting temperature on matte grade and slag phase control, and achieved Under the conditions of oxygen-enriched side-blown smelting temperature of copper-containing sludge of 1200℃-1350℃ and oxygen-enriched concentration of 26%-28%, the copper recovery rate is increased by more than 2% compared with the existing ordinary air blast blowing process, and the bed capacity is increased by 28%. levels above (Fig. 2b). This technology and pilot equipment have been applied in the fire-method smelting workshop of Haixinsha Base, supporting the process optimization and verification of the 100,000-ton copper-containing sludge oxygen-enriched smelting project.
Key technologies for recycling waste lubricating oil/mineral oil. In order to solve the problems of immature full molecular distillation process route and large equipment investment for waste mineral oil recovery in the Guangdong-Hong Kong-Macao Greater Bay Area, this study developed the core technology for recycling waste lubricating oil/mineral oil (IPE-Reyoil-Tech) to achieve effective The recovery rate of valuable components is >85%, and the normal operation time of the device is increased by 50% compared with the traditional process (Figure 2c). This technology has been applied in the 50,000-ton demonstration project at Haixinsha Base.
Collaborative pollution control in the solid waste conversion process
The solid waste resource energy conversion process will also cause serious water and gas secondary pollution problems, which is different from traditional pollution control technology , the collaborative pollution control in the solid waste conversion process generally has the typical characteristics of using waste to treat waste.
Photothermal catalytic dispersion is a key technology for efficient purification of volatile organic compounds (VOCS). In view of the efficient treatment of VOCS generated during the entire centralized disposal process of urban multi-source solid waste, especially hazardous waste containing volatile organic compounds, this study uses MnOX, CoOX, CoAl2O4 and precious metals platinum (Pt), palladium (Pd), and ruthenium (Ru). Substances with catalytic oxidation functions are the active components of photothermal catalytic materials. Sugar Daddy selects those with good VOCS catalytic degradation performance. substance, a monolithic photothermal catalyst was prepared (Figure 3a). At the same time, a 3,000 cubic meter/hour adsorption-catalytic coupling intermittent purification and heating equipment was developed. This technical equipment integrates the advantages of rapid heating of electric metal, low resistance of metal honeycomb catalyst, high thermal conductivity and large specific surface area per unit volume. This technical equipment has been applied in the hazardous waste Class C warehouse of Haixinsha Base and has achieved stable operation, with the total volatile organic component purification efficiency reaching ≥90%.
Key technology for deep purification of biochar wastewater. The sludge generated during the solid waste conversion process is pyrolyzed to generate biochar adsorbent, and then the research and development of adsorption treatment technology for high-salt industrial wastewater is carried out. This study independently designed and constructed a set of 5 cubic meters/day biochar deep purification wastewater on-site verification and evaluation device, equipped with 3 activated carbon adsorption filter tanks of the same specifications with a total filling capacity of 300 kg. Taking the high-salt sewage produced by the physical and chemical unit of Haixinsha Base and the low-salt sewage mixture produced by other units as the target wastewater, a comparative evaluation and verification of adsorption of sludge-based biochar and commercial activated carbon was carried out (Figure 3b). This technology and equipment have been applied in the wastewater treatment workshop of Haixinsha Base, reducing the COD in the water from 554 mg/L to 356 mg/L. The COD removal capacity has reached 75% of that of commercial activated carbon, showing excellent synergy with multiple pollutants. Remove effect.
Intelligent management and control of resources, energy and environment throughout the process
X-ray fluorescence spectrometry online detection (online XRF) technology of highly toxic components in solid waste . The annual production of polymetallic slag, dust and mud solid waste in the Guangdong-Hong Kong-Macao Greater Bay Area is nearly 3 million tons., the comprehensive utilization rate is less than 40%, and the potential for resource recycling is great. Breakthroughs in online monitoring and digital management and control technology of key components in the resource conversion process are the key to achieving clean and efficient recycling. Based on this, this research has made breakthroughs in key technologies such as in-situ highly uniform automatic preparation of solid waste standard samples, automatic filtering and calibration of key element spectra, and accurate quantification of radial basis functions (RBF) adaptive neural networks, and developed a system suitable for multiple industrial scenarios. “Sample sampling – pretreatment – detection analysis – precise quantification” fully automatic integrated high-precision online rapid detection and analysis equipment for solid materials has realized the first set of new online XRF detection devices for complex phase materials at the Haixinsha base site. , the detection accuracy compared with the national environmental protection standard HJ 781-2016 “Determination of 22 Metal Elements in Solid Waste by Inductively Coupled Plasma Emission Spectrometry” method reached a level of more than 92%, and the detection frequency reached 3 times/hour (Figure 4a). This technical equipment has been installed at the Haixinsha base copper-containing sludge fire smelting demonstration project site and is running continuously. Through integration with the decentralized control system (DCS), it provides stable operation and intelligent compatibility of the oxygen-rich side-blown furnace. Important process parameters support.
Integrated intelligent management and control technology for energy and environment conversion of urban multi-source solid waste resources. This study aims at the problems of low energy conversion efficiency of solid waste resources and poor timeliness of intelligent management. It uses a material and energy metabolism simulation algorithm based on big data iterative mining and analysis to realize the flow direction and flow dynamic simulation prediction of key materials, energy, and element streams, and data operations. Frequency >10 minutes/time (Figure 4b). At the same time, an integrated intelligent management and control system for energy and environment conversion of urban multi-source solid waste resources has been developed, realizing the deployment and construction of application functions such as real-time dynamic simulation of multi-source urban solid waste material conversion and full-process tracking of key resource and environmental elements. And a 1 million tons/year urban multi-source solid waste resource energy and environment conversion integrated intelligent management and control platform demonstration project was built at the Haixinsha base.
Comprehensive analysis and evaluation of solid waste metabolic efficiency
Based on the metabolic structure of the urban multi-source solid waste disposal system, combined with traditional solid waste at home and abroad The disposal mode, as well as the actual disposal situation of each unit before and after the implementation of the “Beautiful China Special Project” results in Haixinsha Base, divides the urban multi-source solid waste disposal mode into three scenarios; from the material flow analysis and Zelanian sugar From the perspective of input-output theory, combined with life cycle assessment (LCA) and energy conservationWe have constructed a corresponding analysis framework and its evaluation index system, and conducted a multi-dimensional performance evaluation from the perspectives of resource utilization, environmental impact and energy efficiency with the help of Simapro and Matlab software. Among them, the solid waste separate disposal scenario is the traditional single disposal mode of multi-source solid waste in most cities in my country; the solid waste material co-processing scenario is the urban multi-source solid waste disposal mode of Haixinsha Base before the implementation of this research project; solid waste The material-energy coupling collaborative scenario is the urban multi-source solid waste disposal model of Haixinsha Base after the implementation of this research project (Figure 5).
From the perspective of resource efficiency, under the solid waste co-processing and material energy coupled disposal model, the solid waste disposal volume per unit resource product is reduced by 36.8% compared with the solid waste separate disposal model, that is The resource conversion efficiency has been greatly improved; however, the resource consumption burden under the solid waste co-processing model has also increased significantly, and the solid waste auxiliary material consumption and water consumption per unit disposal have increased by 25.4% and 23.9% respectively; while solid waste material energy coupled disposal The model replaces and supplements resources and energy based on the co-processing model, and the overall consumption of energy, auxiliary materials and water in the system is significantly reduced.
From the perspective of environmental impactZelanian sugar, although solid waste co-processing and material energy couplingZelanian sugar disposal mode, general pollution Sugar Daddy total emissions The amount increased by 10.5% compared with the independent disposal model, and the dioxin emissions also increased by 5.4%; however, the heavy metal pollution emissions did show an obvious decreasing trend, with a decrease rate of 11.5%, and nickel (Ni), zinc ( Zn) and chromium (Cr) have the highest decreasing proportions, accounting for 34.9%, 53.6%, and 6.7% of the total.
From the perspective of energy efficiency, the overall energy consumption intensity of different solid waste disposal modes does not exceed 1, but the energy consumption intensity of the solid waste energy coupled disposal mode is the lowest, which is lower than the individual disposal and collaborative disposal modes. 11.5% and 16.2% lower respectively; while the energy output rate under the solid waste co-processing mode is the highest, 17.4% and 8.0% higher than the separate disposal and material-energy coupled disposal modes respectively. In addition, although the energy recycling in the solid waste energy coupled disposal modeThe rate is 47.3% higher than the co-processing model, but it only reaches the level of 12.2%, which shows that the utilization of low-temperature flue gas and wastewater waste heat is still the next step of the energy system of Haixinsha BaseNewzealand Sugar is an important focus for optimization and improvement.
Green cycle development paths and countermeasures for urban multi-source solid waste disposal
Strengthening the refinement of the entire life cycle of urban multi-source solid waste disposal management and reach a consensus on intensive collaborative disposal of multi-source solid waste
Comprehensively investigate the current status of solid waste production, discharge, transfer and disposal management, and build a full life cycle of “source-flow-sink” for multi-source solid waste Integrated refined smart supervision platform. Comprehensively collect key information including solid waste generation, classification, collection, transportation and disposal facilities, and establish standardized solid waste data collection and management business processes and optimized data sharing supported by big data, artificial intelligence and geographic information system technologies. The intelligent decision-making platform of the mechanism can improve the supervision efficiency of government departments and achieve refined management and monitoring of the entire process of multi-source solid waste from the source of storage, transfer process, to collection and disposal.
Based on the energy metabolism cycle theory of multi-source solid waste materials, it guides the construction planning of comprehensive urban solid waste disposal facilities and forms a consensus on intensive collaborative disposal of multi-source solid waste. Construct an urban multi-source solid waste material energy metabolism cycle model Newzealand Sugar, and formulate scientific and reasonable solid waste co-processing scenario settings. Waste disposal facilities and layout planning ensure that the capacity and processing capacity of the facilities match the demand for solid waste production and discharge; relevant government departments and enterprises jointly set up specific departments to coordinate his mother is a strange womanSugar DaddyPeople. He did not feel this way when he was young, but as he grows older, learns and experiences more, this feeling becomes more and more important. Urban multi-source solid waste faces difficult overall management and low disposal efficiency.
Strengthen breakthroughs and innovations in key technologies for recycling solid waste that is difficult to dispose and use, and improve high-value intelligent utilizationZelanian sugarLevels
Breakthrough in the clean recycling and utilization technology of solid waste resources that are difficult to degrade and separate, improve the level of high-value green utilization, and achieve carbon reduction and energy increase. For solid waste with complex structure or difficult to degrade, encourage bio-basedDevelop and promote the application of new technologies for efficient clean resource and energy utilization of solid waste such as degradation, low-temperature pyrolysis, catalytic conversion, mineral phase separation, and microbubble enhancement to achieve carbon reduction and energy increase in the recycling of organic solid waste, as well as urban minerals Recycling and transformation of high-value hazardous waste and solid waste into high-end products.
Break through the multi-attribute rapid identification and online detection technology of solid waste, and improve the entire process of intelligent analysis and digital governance capabilities. Encourage the development and promotion of new technologies for advanced production planning and advanced process control such as in-situ online monitoring of the calorific value of solid waste components, big data mining, and intelligent compatibility, construct a multi-objective efficiency evaluation and optimization model, and timely monitor the entire life cycle of solid waste recycling Resource and energy utilization efficiency and environmental pollution emissions of Zelanian sugar during the cycle Zelanian Escort level, and promote the improvement of the intelligent utilization level of urban multi-source solid waste.
Focus on the coupling optimization of resources, energy and environmental efficiency in the process of multi-source solid waste co-processingZelanian EscortChemical and integrated management
Pay attention to the multi-dimensional attributes of solid waste, and couple resources-energy-environment multi-objective optimization of composite ecological efficiency. Adopt cross-industry collaborative utilization methods in the park to carry out comprehensive multi-source solid waste disposal, effectively recover solid waste and other useful substances and energy in wastewater and waste gas generated during the disposal process, and achieve coupled optimization and improvement of resource-energy efficiency and environmental pollution control. . Extract and utilize the value of waste resources to the greatest extent, reduce resource and energy consumption waste and environmental impact, and rationally plan the structure and layout of the park’s material and energy system from the perspective of multi-source solid waste co-processing resource-energy-environment multi-objective optimization to improve material and energy Reliability of supply.
Pay attention to environmental protection measures, reduce secondary pollution emissions, and enhance coupling optimization and integrated management of multi-source solid waste co-processing systems. Pay attention to resource-energy-environmental efficiency, and from a full life cycle perspective, strengthen integrated management of the entire process of solid waste transportation, storage, and disposal, including the use of advanced solid waste transportation and storage technology and equipment to effectively reduce solid waste and The potential negative impact of pollutant leakage on the environment promotes the effective improvement of resource-energy efficiency while ensuring the environmental safety of the disposal process. In addition, from different levels of equipment, process and system, dynamic monitoring, evaluation and integrated optimization are carried out for its resource and energy conversion process, secondary pollution emissions, especially carbon emissions, and the solid waste collaboration is optimized by establishing a multi-objective planning and multi-decision-making coupling model. The overall process and operation mode of the treatment ensure the coordination and economy of resources-energy-environment.
Strengthen the effective integration and completion of the goal of building a waste-free city and a waste-free societyZelanian sugarNewzealand SugarImprove solid waste policy management system
Improve urban multi-source solid waste disposal-waste resource recycling and management system. Relying on the “Waste-Free City” construction implementation plan, a comprehensive urban multi-source solid waste disposal and waste resource recycling system will be established. Adhere to the circular economy development concept of multi-source solid waste co-processing, establish a recycling network based on Internet of Things technology, and provide intelligent recycling services; strengthen garbage classification and environmental education to improve recycling efficiency and convert waste resources into renewable resources. Ultimately, solid waste emissions will be reduced, resource recycling will be realized, and the construction of a “waste-free city” will be promoted.
Carry out environmental impact analysis of the solid waste disposal process through multi-source solid waste recycling, and improve the solid waste management and pollution prevention system. Develop diversified recycling NZ Escorts utilization pathways to realize the resource, energy and recycling of waste. Pay attention to environmental protection and residents’ health protection in the process of urban solid waste disposal, conduct environmental impact assessment and real-time reporting of the urban solid waste disposal process based on existing emission standards, and reduce the negative impact of urban solid waste disposal on the environment and society. Zelanian Escort
(Author: Shi Yao, Hua Chao, Zhang Chenmu, Institute of Process Engineering, Chinese Academy of Sciences Strategic Metal Resources National Engineering Research Center for Green Recycling; Li Huiquan, Institute of Process Engineering, Chinese Academy of Sciences; National Engineering Research Center for Green Recycling of Strategic Metal Resources; School of Chemical Engineering, University of Chinese Academy of Sciences; Chen Shaohua, Chen Weiqiang, Wang Yin, Lu Xin, Institute of Urban Environment, Chinese Academy of Sciences; Xiong Caihong, Guangdong Dongshi Environmental Co., Ltd.; Li Songgeng, Institute of Process Engineering, Chinese Academy of Sciences, School of Chemical Engineering, University of Chinese Academy of Sciences; Qian Peng, Li Shuangde, Institute of Process Engineering, Chinese Academy of Sciences (Proceedings of the Chinese Academy of Sciences)