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Lankao County Sludge Harmless and Resource-Based Disposal Project

2025-05-14

Project Name: Henan Lankao County Center for Harmless and Resource-Based Disposal of Municipal Sludge
Project Location: Lankao County, Kaifeng City, Henan Province
Project Status: Construction was completed and the facility began trial operations in 2023, with stable, standard-compliant operations set to commence in 2024.
Design scale: Processes 60 tons of wet sludge per day (based on a moisture content of 80%).

To actively respond to the national initiative of building "Zero-Waste Cities" and the ecological protection and high-quality development strategy for the Yellow River Basin, Lankao County has prioritized the standardized disposal of municipal sludge as a key task in its urban environmental infrastructure development. Against this backdrop, the Lankao County Sludge Harmlessness and Resource Utilization Project was launched—serving as a flagship initiative aimed at enhancing regional environmental quality while promoting green, circular development.

Core Technology: The project employs Fully Automated Intelligent Control Sludge Treatment System , the core process route is "deep dehydration + ultra-high-temperature aerobic fermentation," ensuring that sludge treatment is efficient, environmentally friendly, and completely harmless throughout the entire process.

High-efficiency deep dehydration section:
The received 80% moisture-content municipal sludge, after being modified with a specialized conditioner, is fed into an ultra-high-pressure belt dewatering machine for filtration. This process step reduces the sludge's moisture content to Reduced significantly to 45%-50% in a single step , effectively reducing sludge volume, creating favorable conditions for subsequent biofermentation, and significantly lowering energy consumption.

Intelligent Ultra-High-Temperature Aerobic Fermentation Stage:
Dehydrated sludge and activated Ultra-high-temperature composite microbial agent Uniformly mixed within the automation system, then conveyed to the patented design. Layered Intelligent Ultra-High-Temperature Aerobic Fermentation Tank Inside. Under precisely controlled conditions of oxygen, temperature, and humidity, microorganisms rapidly proliferate, causing the material inside the tank to heat up. Continuously maintained above 70°C This ultra-high-temperature process can Completely eliminate pathogens, parasite eggs, and weed seeds. , achieving complete harmlessness and further volume reduction of sludge.

Final Product and Resource Utilization: After about 15 to 20 days of thorough fermentation and maturation, the resulting sludge-based compost is ready for use. Moisture content below 40% , it appears as a loose granular form, odorless, and chemically stable. This high-quality product can be used as Nutrient-rich soil or soil conditioner , safely applied to projects such as landscape greening within county areas, nursery cultivation, and ecological restoration of abandoned lands, truly achieving the transformation of waste into valuable resources and closing the loop in the "wastewater treatment - sludge management - land utilization" cycle.

Project Highlights and Social Benefits

Thoroughly Harmless Disposal: The ultra-high-temperature fermentation process fundamentally eliminates the risk of secondary contamination from sludge, ensuring public health and safety.

High resource utilization rate: Turning sludge into a usable resource aligns with the concept of a circular economy, reducing fertilizer use and improving soil quality.

Intelligent Operation: Full-process automated control significantly reduces manual operations, ensuring stable and reliable operation with high processing efficiency.

Significant ecological benefits: The completion and operation of the project represent a vivid demonstration of Lankao County's commitment to the development philosophy that "lucid waters and lush mountains are invaluable assets," and hold significant importance for improving the local living environment and safeguarding the ecological health of the Yellow River basin.

The successful operation of this project not only resolved the hidden danger of "sludge besieging the city" in Lancao County but also established a replicable and scalable county-level sludge treatment model—the "Lancao Model"—setting a new benchmark for green and sustainable development in the Central Plains region.

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