Benenv MDS Series Multi-Disk Screw Press: Certified and Parameter‑Driven Sludge Dewatering for Industries

Benenv is a global environmental technology company that designs and manufactures Multi-Disk Screw Press systems for sludge dewatering. With a 20,000 m² factory, over 200 employees, and a dedicated R&D team of 50 engineers, Benenv produces more than 500 units per year and exports 70% of its output to markets in Europe, the United States, Southeast Asia, the Middle East, and Australia. The MDS series of screw press sludge dewatering machines is built for continuous, automatic operation in municipal, industrial, and food processing wastewater treatment.

The Challenge: Consistent, Low‑Cost Sludge Dewatering

Industrial and municipal wastewater treatment plants face the problem of handling large volumes of sludge with high moisture content. Traditional dewatering methods often involve high energy consumption, frequent maintenance, and manual cleaning. A screw press sludge dewatering machine that operates 24/7 with minimal intervention is critical to reduce disposal costs and meet regulatory compliance.

Industry Context: The Shift toward Multi‑Disk Technology

The sludge dewatering equipment market has increasingly adopted the multi‑plate screw press (also called multi‑disk screw press) because of its self‑cleaning design, low energy consumption, and ability to handle oily or greasy sludge without clogging. Benenv’s MDS series fits into this trend by offering models that cover a wide throughput range while keeping power consumption low and wash water usage minimal.

Benenv MDS Series: Certified, Parameter‑Driven Solution

The MDS series is a multi‑disk screw press type dewatering press machine that operates in three stages: gravity concentration, screw conveying, and back‑pressure dewatering. It is designed for fully automatic continuous sludge dewatering, with a polymer dosing system and PLC control cabinet as standard auxiliary equipment. All models are available in SS304 or SS316L material to suit corrosive environments.

The series includes models from the compact MDS101 (0.12–1.5 m³/h, 0.2 kW) to the high‑capacity MDS404 (13.6–200 m³/h, 8.2 kW). The machines feature a self‑cleaning mechanism that prevents clogging, low noise and vibration, and water‑saving operation. These characteristics make the system suitable for dewatering of DAF sludge, chemical sludge, palm oil mill effluent, and municipal sludge.

Step‑by‑Step Working Principle

1. Flocculation and Gravity Concentration: Raw sludge is mixed with polymer in a conditioning tank, then fed by a screw pump into the concentration zone. Gravity separates free water.
2. Screw Conveying and Shearing: The screw rotates at low speed, conveying the sludge forward while gradually increasing pressure due to the decreasing pitch of the screw. The multi‑disk design continuously cleans the screen through the axial movement of the disks.
3. Back‑Pressure Dewatering: At the discharge end, a back‑pressure plate maintains the required pressure to squeeze out remaining water, producing a dry cake with low moisture content.
4. Cake Discharge and Filtrate Collection: Dewatered cake drops onto a conveyor for disposal, while filtrate is collected for return to the treatment system.

The entire process is controlled by a PLC, allowing 24/7 operation with minimal operator attention.

Real‑World Applications

Benenv’s MDS series has been deployed globally. Examples from the project database include:

• Oman Drydock (Middle East): One MDS202 unit dewatering industrial sludge at the largest shipyard in the Middle East, operating stably for over a year with low energy consumption.
• Vietnam (Textile Printing & Dyeing): MDS202 dewatering printing and dyeing sludge for an automotive OEM, highlighted for its self‑cleaning mechanism.
• Indonesia (Palm Oil Mill): Two MDS403 units dewatering palm oil mill sludge, operating for 3 years with simple maintenance requirements.
• France (Industrial Park): MDS353 dewatering sludge in an industrial park, noted for continuous operation and low noise.

MDS Series Comparison Table

Certifications and Quality Assurance

Benenv holds CE certification (certificate No. M.2024.206.C97307, valid until 2029-03-05) for the entire MDS series, covering compliance with EN 60204-1:2018 for the EU market. The company also complies with ISO 9001:2015 (certificate 18122Q11896R1M, valid until 2028-09-01) for design and production of Multi-Disk Screw Press, WAVE Separator, Super Sludge Dryer, Carbonization Furnace and Fermentation Tank. Every machine undergoes 100% pre-shipment testing; third‑party inspection (e.g., SGS) is available upon request.

Frequently Asked Questions

Conclusion

Benenv’s MDS series multi‑disk screw press provides a certified, parameter‑driven solution for continuous sludge dewatering across municipal and industrial sectors. With proven CE and ISO certifications, a wide range of models to match flow and space requirements, and a global track record of stable operation, the MDS series is a reliable choice for buyers seeking efficient, low‑maintenance sludge dewatering equipment. For detailed specifications or a project‑specific proposal, reach out to the Benenv sales team through the contact information below.