Key technologies and applications for energy-saving and resource utilization of urban sludge
Green energy-saving wall materials are made from urban sludge, which saves energy in buildings and turns waste into treasure.
Type
Tags
Solution maturity
Mass promotion / Mass production
Applicable industry
Applications
Key innovations
The innovation of this project lies in the successful efficient utilization of urban sludge and the production of green energy-saving wall materials.
Potential economic benefits
Through the resource utilization of urban sludge, this project turns waste into treasure and produces green energy-saving wall materials, effectively solves the problem of sludge disposal and reduces environmental pollution. Using rice husks instead of coal burning will significantly reduce production costs and carbon emissions. The products meet the needs of energy-saving buildings and have a broad market.
Potential climate benefits
Biomass fuels replace coal burning and reduce carbon emissions from production. Sludge replaces clay to avoid carbon consumption from mining. Energy-saving wall materials improve building energy efficiency, reduce operating carbon emissions, and avoid methane emissions from sludge landfills.
Solution supplier
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Tongji University
Tongji University: The national "double first-class" construction university uses advantageous disciplines such as civil engineering, architecture, transportation, and environment to cultivate innovative talents to serve national construction and sustainable urban development.
Shanghai，China
Solution details
This project belongs to the field of comprehensive utilization of solid waste. It involves key technologies and application complete sets of technologies to produce green energy-saving wall materials from urban sludge. It also belongs to the field of energy-saving building materials.
Every year, urban sludge emissions are huge. Due to technical problems such as complex sources, high organic matter content, and local environmental safety risks, it leads to simple and extensive disposal, low resource utilization, and serious environmental pollution, which urgently needs to be solved. In response to these technical problems and the major demand for energy-saving wall materials in urban construction, the project team, with the support of national science and technology, the National 863 Plan, and the National Natural Fund of China, has researched and invented methods for urban sludge safety evaluation, control and treatment, and green A series of products and technologies with independent intellectual property rights throughout the industrial chain from the production of energy-saving wall materials to the application of sludge energy-saving product systems, and have been promoted and applied in a large number of projects. Energy-saving and efficient recycling of urban sludge have been realized. The main technical inventions include:
Every year, urban sludge emissions are huge. Due to technical problems such as complex sources, high organic matter content, and local environmental safety risks, it leads to simple and extensive disposal, low resource utilization, and serious environmental pollution, which urgently needs to be solved. In response to these technical problems and the major demand for energy-saving wall materials in urban construction, the project team, with the support of national science and technology, the National 863 Plan, and the National Natural Fund of China, has researched and invented methods for urban sludge safety evaluation, control and treatment, and green A series of products and technologies with independent intellectual property rights throughout the industrial chain from the production of energy-saving wall materials to the application of sludge energy-saving product systems, and have been promoted and applied in a large number of projects. Energy-saving and efficient recycling of urban sludge have been realized. The main technical inventions include:
- Environmental safety assessment, control and pretreatment technologies for urban sludge. 1) Aiming at the problem of wide distribution and large differences of urban sludge, a distribution characteristic map of physical and chemical characteristics and environmental safety of urban sludge in Shanghai was constructed;2) Aiming at the problem of excessive heavy metals in sludge in some areas, a method for electrically removing heavy metals in urban sludge was invented. and device effectively control environmental safety; 3) Aiming at the problems of uneven impurities, high organic matter, and high moisture content in urban sludge, we have developed sludge pretreatment technology, processes and devices suitable for the production of energy-saving products, effectively solving the problems of high drying energy consumption and unstable quality of sintered products. Technical problems.
- Key technologies for preparing lightweight and energy-saving wall materials by high-temperature sintering of urban sludge. 1) Aiming at the problems of large carbon emissions and serious pollution from traditional coal burning, invented the key technology of replacing 100% direct combustion of coal into sludge products with rice hull biomass fuel, which reduced production energy consumption and carbon emissions;2) Aiming at the contradiction between the demand for energy-saving wall materials and the city's ban on sticking, invented key technologies such as the design, preparation, production and firing of self-insulating sintered porous bricks by replacing 100% urban sludge with clay; 3) Aiming at the problem of high content of urban silt, sand and organic matter, invented a new method for swelling of silt lightweight ceramite and key technologies and devices for the production of silt lightweight ceramite, which solved the problems of urban silt being not easy to swell and waste heat recovery; and developed a production technology for high-efficiency thermal insulation silt ceramite lightweight blocks;4) Aiming at the differences in the composition of urban foundation pit silt, developed key technologies such as quality control for preparing sintered porous bricks from construction foundation pit silt, and "low-temperature and high-humidity" drying and roasting of green bodies; 5) Aiming at the characteristics of other types of solid waste in the city, invent key technologies for the collaborative disposal of other solid waste in urban sludge to prepare energy-saving sintered porous bricks or ceramsite.
- Key technologies for the application of urban sludge energy-saving product system. 1) Design a complete set of key technologies such as application structure and supporting materials for an urban sludge lightweight self-insulation system with a building energy saving rate of 65%;2) Aiming at the problem of ceramite lightweight concrete that ceramite is easy to float and has great workability loss, the invention is used to control ceramite lightweight concrete pumping and application technology for concrete slump loss, realizing ultra-high pumping of sludge lightweight ceramite concrete; 3) In response to the lack of urban natural stone resources, we invented and used urban silt ceramsite as the main substrate to develop environmentally friendly artificial cultural stone decoration products and application key technologies.
It has obtained 16 authorized invention patents, 9 utility model authorizations, and applied for 2 invention patents. It has edited or participated in the compilation of 3 national standards and specifications, and participated in the compilation of 4 industry or local standards and specifications. It has published 56 papers in core journals at home and abroad, including SCI and EI. The results of many special topics have been identified and reached the international advanced level. Related energy-saving products such as sludge self-insulation sintered porous bricks have won a total of 23 honors from Shanghai City such as patented new products, energy-saving products, and comprehensive resource utilization certification. The results have been produced on a large scale in many companies and have been widely promoted and applied in key projects in Shanghai, Fujian, Zhejiang and other provinces and cities, producing significant economic, social and environmental benefits. From 2011 to 2013, a total added output value of 1.23 billion yuan.
Last updated
01:01:04, Nov 08, 2025
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