Automatic Screw Press for Municipal & Industrial Sludge Dewatering

The Screw Press Sludge Dewatering Machine from Qingdao Linzhen Environment Project Co., Ltd. is an advanced sludge dewatering solution designed for continuous, energy-efficient solid-liquid separation. Featuring a clog-free self-cleaning structure, low-speed screw extrusion technology, and intelligent PLC automation, the system delivers reliable dewatering performance while significantly reducing energy consumption, maintenance costs, and water usage.

Compared with conventional belt filter presses and centrifugal dewatering machines, the Linzhen screw press offers superior operational stability, lower running costs, and excellent adaptability to a wide range of sludge types, including municipal sewage sludge, pharmaceutical sludge, chemical sludge, oily food sludge, and high-salinity industrial sludge.

As a professional manufacturer of sludge dewatering equipment, industrial wastewater treatment systems, and integrated sewage treatment solutions, Linzhen supplies customized screw press systems for wastewater treatment projects in more than 50 countries across Asia, Europe, Africa, South America, and Oceania.

Working principle

Working principle of screw press sludge dewatering machine

Through the sludge delivery pump, the sludge is transported to the sludgedeliveryoort. The sludge is transported to the flocculation mixing tank afteradjusting the flowrate through the metering tank, and the sludge is fully stirredand mixed by the mixer.

After fully stirring through the mixer to form a largealum flower, it is sent into themain body of the stacking screw. 

The alumflower sent into the concentration part is concentrated by gravity whilemovingto the direction of the dehydration part. 

The gap between the swimming ringand the fixed ring of the dehydration part be-comes narrow, and the dehydr-ation is further pressurized by adjusting the backpressure plate located at theexhaust outlet, and finally the mud cake is discharged

Product characteristics

Low power, high torque, low speed operation, less failure.
Exquisite processing technology, low cost.
Small footprint, high degree of automation.
Supply OEM service ,1 year spare for free.

Core Product Advantages

Clog-Free Self-Cleaning Design, Low Maintenance

No filter cloth or filter screen, completely avoid frequent blockage troubles of traditional dewatering machines. Relative movement between moving and fixed discs forms automatic self-cleaning gap, suitable for oily, fibrous, high-viscosity pharmaceutical sludge without frequent washing. Vulnerable parts are few, greatly cut daily maintenance cost.

Ultra Low Energy & Water Consumption

Low-speed screw operation, power consumption only 5%-20% of centrifugal dewatering machine. Self-cleaning structure saves over 90% flushing water vs belt filter press, ideal for water-shortage areas such as Saudi high-temperature industrial parks.

Compact Integrated Structure, Small Footprint

Integrated thickening + dewatering all-in-one design, no independent sludge thickening tank required. Small floor space, easy indoor & outdoor installation, reduces civil construction investment 

Full Stainless Steel Corrosion Resistance

All medium contact components adopt SUS304 / SUS316L stainless steel, anti-acid, anti-alkali, anti-high salinity corrosion. Stable operation under extreme high temperature and high TDS raw water environment

Fully Automatic Unattended Operation

Equipped with intelligent PLC control cabinet, linkage control of sludge pump, dosing pump and flushing system. Realize 24-hour continuous unmanned operation, only regular simple inspection needed, save labor cost.

Low Noise & Odor-Tight Environmental Protection

Slow rotation without strong vibration, running noise below 60dB. Fully closed dewatering cavity prevents odor overflow, no secondary pollution, complies with global environmental wastewater discharge standards.

Wide Sludge Adaptability

Handle sludge solid content range 2000mg/L ~ 50000mg/L. Works well for low-concentration raw sludge without pre-concentration; compatible with municipal sludge, pharmaceutical sludge, chemical sludge, printing & dyeing sludge, food oily sludge, high-salinity industrial sludge.

Main Application Industries

Pharmaceutical industry: Purified water station sludge, pharmacy biochemical sludge, high-salinity pharmaceutical wastewater sludge
Municipal wastewater treatment plant: Domestic sewage sludge, urban sewage residual sludge
Chemical industry: Acid & alkali chemical sludge, high TDS industrial sludge
Food & beverage: Oily food processing sludge, starch, brewery sludge
Printing & dyeing, papermaking, leather, aquaculture, landfill leachate sludge
Overseas high-salinity projects: Saudi Arabia, Pakistan, Indonesia industrial wastewater treatment

Frequently Asked Questions

Q1: What sludge types can the screw press handle?
A: It supports municipal sludge, pharmaceutical biochemical sludge, oily food sludge, chemical high-salinity sludge, printing & dyeing sludge, low-concentration raw sludge without thickener.

Q2: Is this machine suitable for Saudi high-temperature & high-salinity water environment?
A: Yes. Core contact parts use SUS316L stainless steel with strong anti-corrosion performance, low-speed stable operation, adapt to extreme heat and high TDS underground water working conditions in Middle East.

Q3: Does the screw press need continuous manual operation?
A: No. Full automatic PLC linkage control, 24h unattended continuous dewatering, only weekly routine inspection required.

Q4: What’s the biggest advantage over belt filter press?
A: No filter cloth replacement cost, self-cleaning anti-clog structure, save 70% running cost, smaller footprint and lower water consumption.