Turning urban sludge into treasure: from garbage to gold

With the acceleration of urbanization, domestic sludge treatment has become a major challenge in the field of environmental protection. Traditional landfill or incineration methods not only occupy land resources, but also may cause secondary pollution. Today, through advanced sludge drying technology and biological sludge dryers, urban domestic sludge can be converted into high-value biomass fertilizer, truly realizing "turning waste into treasure".

The core advantages of sludge drying technology

Sludge drying is a key part of sludge treatment, and through low-temperature drying technologies such as sludge dryer cryogenic processes, the volume and weight of sludge can be greatly reduced while retaining organic nutrients. Compared with traditional methods, low-temperature drying can effectively reduce energy consumption and avoid the destruction of nutrients by high temperatures.

The principle of operation of the tumble dryer

Modern urban sludge drying equipment mostly adopts drum design, and its advantages include:

• Uniform heating: The sludge is churned in the drum to ensure      consistent water evaporation
• Energy-saving and efficient: The heat recovery system can      reduce energy consumption by more than 30%.
• Flexible adaptation: The speed and temperature can be adjusted      according to the specifications of the sludge dryer

The whole process from dehydration to recycling

The complete sludge treatment process consists of three stages:

1. Sludge dewatering: The water content is reduced to less than      80% by mechanical dewatering
2. Deep drying: Biological sludge dryer to reduce moisture content      to 10-20%
3. Fertilizer conversion: add microbial agent for aerobic      fermentation to make organic fertilizer that meets the standards

Key indicators for equipment selection

When choosing urban domestic sludge drying equipment, you need to pay attention to:

• Capacity (tons/hour)
• Heat source type (steam/electricity/gas)
• Exhaust gas treatment system configuration
• Level of automation control

Economic benefits and environmental values

Take a project that processes 100 tons of sludge per day as an example:

Future Trends

With the advancement of technology, the specifications of the new generation of sludge dryers are developing in the direction of intelligence and modularization:

• IoT remote monitoring system
• Solar-assisted heating device
• Multi-stage waste heat utilization design

Through innovative technology, domestic sludge is converted into biomass fertilizer, which not only solves the problem of environmental pollution, but also creates considerable economic benefits, and truly realizes the circular economy model of "turning garbage into gold".