In the modern era of industrial wastewater treatment and sludge disposal, efficient solid-liquid separation is critical for operational cost reduction and strict environmental compliance. As an industry-leading technological solution, the Multi-Disk Screw Press (MDS) has revolutionized how municipal authorities and diverse industrial sectors dewater biological, chemical, and physical sludge. Moving beyond traditional systems like centrifuges and belt presses, MDS relies on a low-speed mechanical screw structure with alternating fixed and moving rings to minimize clogging, reduce power consumption, and maintain an automated operation flow.
Unlike conventional filtration techniques, the MDS relies on dynamic, self-cleaning ring layers that continuously clean the filtration gaps during operation. This prevents blinding or clogging, which is typical when dealing with high-viscosity oily sludge. The screw shaft, driven by a highly efficient gearmotor, turns at speeds typically between 1 to 4 RPM. This slow motion generates exceptional dewatering pressure while consuming a fraction of the electricity required by high-speed centrifuges.
Historically, belt filter presses and decanter centrifuges dominated industrial wastewater plants. However, their limitations are substantial: belt presses require excessive wash water and have massive open footprints that lead to odor contamination, whereas decanter centrifuges exhibit very high power draws, suffer from abrasive wear, and demand significant maintenance. The Multi-Disk Screw Press solves these pain points by integrating the thickening and dewatering zones into a single, compact, enclosed system.
| Performance Metric | Multi-Disk Screw Press (MDS) | Decanter Centrifuge | Belt Filter Press |
|---|---|---|---|
| Specific Power Consumption | Ultra-low (0.1 - 0.3 kWh/kg-DS) | High (1.2 - 2.5 kWh/kg-DS) | Medium (0.4 - 0.8 kWh/kg-DS) |
| Rinse Water Requirement | Minimal (Self-cleaning cycle) | Moderate to Low | Extremely High (Continuous belt wash) |
| Operational Noise Level | Very Low (< 65 dB) | High (75 - 85 dB) | Medium |
| Oily Sludge Capability | Excellent (No clogging) | Fair (Slippage issues) | Poor (Blinds filter belts) |
| Footprint & Enclosure | Compact, Fully Enclosed | Moderate, Enclosed | Large, Open (High odor emissions) |
Industrial sectors have vastly different sludge profiles, necessitating a customizable operational approach.
As a global manufacturing hub, China offers unmatched supply chain resilience and cost-to-performance ratios for heavy process machinery. Jiangsu Zongheng Concentrating and Drying Equipment Co., Ltd. (historically founded in 1992 as the Yixing Yangxi Light Industry Machinery Factory) serves as a classic example of this industrial capability. Over 30 years of vertical integration has built an advanced production line that controls everything from raw plate cutting to precise machining of the screw shaft.
By sourcing raw materials locally within Jiangsu's industrial clusters, Zongheng ensures high-grade SS304/SS316L stainless steel procurement with complete raw material traceability. Structural machining tolerances on screw flights and outer rings are kept at micrometer-level precision. This tight tolerance reduces backflow and wear, ensuring the equipment maintains its design compression ratio over thousands of operational hours.
For heavy industrial and thermal processing equipment, structural integrity under pressure is non-negotiable. Jiangsu Zongheng holds the ASME "U" Stamp authorization, the Special Equipment Manufacturing License of China (Category III medium & low-pressure vessels), and ISO9001 certification. Every piece of equipment is subjected to rigorous nondestructive testing (NDT) to prevent structural failure in high-load scenarios.
The future of industrial sludge dewatering lies in automation, real-time sensing, and smart material coatings. Zongheng is currently developing advanced IoT-enabled MDS systems integrated with remote control dashboards. These systems monitor feed pressure, polymer flow, cake thickness, and motor torque values in real time, dynamically adjusting screw rotational speeds to maintain optimal cake moisture even with fluctuating incoming sludge feeds.
Additionally, metallurgy developments are expanding the lifespan of wear parts. The screw flights are being engineered with tungsten carbide coatings using advanced High-Velocity Oxygen Fuel (HVOF) thermal spray processes. This hard-facing technology ensures that abrasive grit in municipal sludge does not prematurely degrade the screw shaft, keeping maintenance schedules to a minimum.
Zongheng covers over 54,000 square meters with workshop space exceeding 22,000 square meters. The engineering team consists of 3 senior engineers, over 20 specialized engineers, and 120 total staff members.
Achieved the International Quality System Certification (Certificate No.: 45021), establishing a complete quality assurance system aligned with modern global standards.
Acquired the ASME "U" Stamp authorization, marking a major milestone in high-pressure vessel manufacturing for international markets.
Obtained the Special Equipment Manufacturing License of the People's Republic of China (License No.: TS2232C42), authorizing the production of Category III pressure vessels.
Recognized officially as a Jiangsu Provincial High-Tech Enterprise due to proprietary innovations in concentration, drying, and separation technology.
Took the lead in the regional industry by obtaining the ISO9001 standard certification for systematic quality control in design and manufacturing.
Established as Yixing Yangxi Light Industrial Machinery Factory in Zhoutie Town, Yixing City. The company began with a total area of approximately 15 mu and 45 employees.
Our mechanical systems are designed to operate as single modular units or seamlessly integrate with complete industrial processing lines, ensuring minimal dry cake moisture and optimal heat utilization.
Efficient thermal systems designed to concentrate thin liquid residues in food, starch, chemical, and alcohol processing plants prior to secondary dewatering.
Continuous processing of high-viscosity or biological sludges. Achieves high solids separation with low RPM and self-cleaning dynamics.
High-velocity thermal drying equipment that takes wet dewatered solids and produces stable, fine dry powders for recycling or disposal.
Ensures low-oxygen thermal drying of organic materials such as corn germ, gluten, DDGS, and concentrated starches. Relies on internal rotating steam tube bundles for heat transfer.
Configured specifically for large-capacity processing plants. Featuring heavy structural design with Category III safety pressure ratings.
We warmly welcome friends from various industries, both domestic and international, to visit us for cooperation, design optimization, and mutual development!
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