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Municipal Sludge Treatment Solutions
Project Introduction
Sludge itself is a resource that can be utilized. The industrialization of sludge management aims to leverage viable technological approaches to turn sludge into a valuable resource, addressing its environmental impact while also generating tangible economic benefits.
The construction of this sludge treatment project will lay a solid foundation for achieving the comprehensive utilization of sludge from urban wastewater treatment plants, making it highly significant.
Comparison of Mainstream Sludge Treatment Processes
| Sludge Treatment Methods | Advantages | Disadvantages |
| Sanitary Landfill Method | Low processing costs, large handling capacity, and strong adaptability | Has requirements for land Easily leads to secondary pollution—phase out |
| Incineration method (co-firing or brick-making) | High degree of reduction, high degree of harmlessness, and high treatment efficiency | There are still certain processing costs, Resource waste |
| Anaerobic Digestion Method | Energy Recovery | Equipment investment is substantial, and despite the long stabilization period, incomplete issues still remain. |
| Thermal Drying | Small footprint, fast speed | Operating costs are high, and harmlessness has not been achieved. |
| Deep sludge dewatering + aerobic fermentation method | Highly mechanized, low processing costs, high resource utilization, simple operation, and steadily growing for wider adoption. | Highly mechanized, requiring a certain level of investment. |
Introduction to the Process of This Project
Sludge cavitation wall-breaking + deep dewatering + ultra-high-temperature aerobic fermentation process: Sludge with a moisture content of 97–99% first undergoes cavitation wall-breaking. After cavitation, it is fed into conventional sludge dewatering equipment (such as integrated dewatering machines, plate-and-frame filter presses, or belt-type sludge dewaterers) for further dewatering. Following this step, the sludge’s moisture content is reduced to 65–80%. Next, the dewatered sludge is conditioned with a specially formulated sludge conditioner before being sent to an ultra-high-pressure belt-type dewaterer for advanced deep dewatering. Once deep-dewatered to a moisture content of 40–50%, the sludge is mixed thoroughly with ultra-high-temperature aerobic fermentation bacteria and then transferred to intelligent high-temperature aerobic fermentation tanks. After complete maturation, the material is screened and stored in the finished product warehouse, where it can be used for applications such as flower and seedling cultivation, as well as soil improvement.
Process Route
Process Flow Diagram
The municipal wastewater plant conditions sludge with 80% moisture content before feeding it into a high-pressure machine for advanced dewatering. After this process, the sludge's moisture level can be reduced to as low as 45–50%.
After deep dehydration, the sludge contains 45-50% moisture. It is then mixed thoroughly with activated ultra-high-temperature microbial strains before being transferred into a stratified, intelligent, ultra-high-temperature aerobic fermentation tank for aerobic fermentation. During the fermentation process, microorganisms proliferate rapidly, causing the material temperature to rise sharply—often reaching over 70°C. This high temperature effectively eliminates insect eggs, pathogenic bacteria, and weed seeds, ensuring that the final product meets stringent standards for harmlessness and volume reduction.
After the aerobic fermentation process is completed, the moisture content of the material remains below 40%, the particles are loose and odorless, and all indicators meet the national GB4284 standard, making it suitable for landscaping and soil improvement applications.
Project Process Technology Features
Cost savings
Utilizing hydraulic cavitation technology to disrupt sludge cell walls improves sludge dewatering performance and biodegradability, while reducing the amount of sludge conditioning agents needed, thereby lowering sludge dewatering costs.
Independently developed
The independently developed ultra-high-pressure sludge belt dewatering machine features a composite upper-and-lower pressing plate structure, offering high processing capacity and显著ly superior dewatering performance, with the filter cake achieving a moisture content of below 50%.
Energy conservation and consumption reduction
The ultra-high-temperature aerobic rapid fermentation technology is a mature technology in China; it features intelligent operation, high temperatures, fast processing times, minimal land requirements, low investment, and reduced costs. Additionally, it boasts a short construction period and produces fertilizer with high efficiency. The system also incorporates waste heat recovery technology to enhance energy savings and reduce consumption, while layered heating further optimizes the fermentation and maturation process, significantly cutting down the overall cycle time.
Fermentation happens quickly
The strain produces rapid temperature rise and fast fermentation speed.
Core Technology
Patented Technologies Related to Deep Dewatering of Company Sludge
| 1 | Patent No.: ZL202120946568.8 "An Ultra-High-Pressure Sludge Belt Dewatering Machine" |
| 2 | Patent No.: ZL 202121414108.7 "Sliding Pulley and Filter Belt-Type Filter Plate Device for an Ultra-High-Pressure Belt Dewatering Machine" |
| 3 | Patent No.: ZL 2021 2 2158665.3 "An Upright Double-Layer Filter Cloth Circulating Pressure Filtration Device" |
| 4 | Patent No.: ZL 2021 2 1414938.X "A Roller-Type Belt Filter Plate for Ultra-High-Pressure Sludge Dewatering Machine" |
| 5 | Patent No.: ZL 2021 2 2158541.5 "A Filter Plate for a Vertical Filter Press" |
Core Technology
Company's patented technologies related to sludge treatment
| 1 | Patent No.: ZL 2019 2 1294222.3 "A Municipal Sludge High-Temperature Pure Oxygen Aeration Fermentation Production System and Process" |
| 2 | "Control Device for Supplementing Carbon Source via Sludge Hydrolysis and Fermentation," Patent No.: ZL 2019 2 1420854.X |
| 3 | Patent No.: ZL 2020 2 0919712.4 "A High-Temperature, Aerobic, Rapid Fermentation, Turning-Type Silo" |
| 4 | "An Integrated Heat-Conducting Blowing Device for Fermentation" Application No.: CN202021838117.4 |
| 5 | "Device for Detecting Parameters of an Ultra-High Temperature Fermentation Chamber," Application No.: CN202022862996.0 |
| 6 | "An Ultra-High-Temperature Fermentation Chamber Top Feeding Control System," Application No.: CN202022868902.0 |
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Fudiyuan Engineering Equipment (Henan) Co., Ltd.
Tel：+86-13803783888
Address: No. 14, Hualiang Road, Lankao County Economic and Technological Development Zone, Kaifeng City, Henan Province
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