Why Should Sludge Treatment Be Deeply Dewatered?

Why is sludge dewatering necessary? This is a common question among our customers. Here, we analyze the key reasons for deep sludge dewatering. Without proper dewatering, industrial sludge becomes difficult to handle and transport, leading not only to environmental pollution but also to a cascade of operational challenges.

1. **Significant Benefits of Deep Dewatering**
Sludge generated by sewage treatment plants, chemical facilities, and industrial enterprises typically has a moisture content exceeding 90%, sometimes reaching as high as 99%. In this fluid state, the sludge occupies large volumes, spreads easily, and poses significant challenges for transportation and storage. Therefore, reducing moisture content and volume is essential. LZZG’s sludge press dryer can reduce sludge moisture content to between 15% and 50%. For instance, sludge with an initial moisture content of 95% can be processed down to 40%, resulting in an 11-fold reduction in volume—demonstrating the clear effectiveness of this technology.

2. Deep sludge dehydration effectively eliminates odors, pathogens, and other harmful substances. The process produces a dry, hard mud cake with extremely low moisture content. As harmful substances are removed along with the extracted water, the resulting mud cake is non-sticky, has a dry surface, and is odorless, thereby stabilizing the sludge.

3. Mud cakes with low moisture content are more suitable for resource recovery. According to relevant national regulations, sludge cannot be landfilled unless its moisture content is reduced to 60% or less. Sludge can be mixed with other materials and sent to a calciner for combustion in solid form, where the moisture content is approximately 50%. However, plate and frame filter presses, membrane filter presses, chamber filter presses, and similar equipment often fail to meet these standards directly after processing. This necessitates additional drying using dedicated drying equipment, or requires several days of natural drying for the mud cakes to comply with regulations. Such processes waste resources and time, contradicting the original intent of environmental protection. In contrast, sludge cakes treated by LZZG’s sludge press dryer directly meet the standards for sludge resource disposal.

The three key benefits of deep sludge dewatering outlined by the filter press manufacturer above should clarify why this process is essential for effective sludge treatment. As national regulations on sludge disposal become increasingly stringent, the advantages of deep dewatering are becoming more pronounced. Industry leaders in filter press manufacturing have also noted a growing market demand for advanced deep dewatering equipment.