With the rapid development of the global food processing industry, wastewater treatment has become a critical challenge for overseas food plants. Wastewater generated from food production typically contains high levels of organic matter, oil, grease, and suspended solids. Efficient sludge dewatering is essential to reduce disposal costs, improve environmental compliance, and enhance overall plant efficiency.

The GN Dewatering Screw Press offers a reliable and economical solution for sludge treatment in food plant wastewater systems.

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What is GN Screw Press Sludge Dewatering Machine?

GN screw press sludge dewatering machine is a kind of economic and environmentally friendly sludge dewatering equipment. It is a new type of sludge extrusion dewatering equipment that operates based on the principle of screw extrusion.

Through:

• The change of screw diameter and screw pitch

• The strong squeezing force generated during rotation

• The tiny gap between floating rings and fixed rings

the machine effectively achieves solid-liquid separation.

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System Composition and Working Process

The GN dewatering screw press system mainly consists of:

• Fully automatic control cabinet

• Flocculation conditioning tank

• Sludge thickening and dewatering unit

• Filtrate collecting tank

With advanced automation technology, the system can:

• Perform automatic flocculation dosing

• Continuously complete sludge thickening and dewatering

• Automatically discharge or recycle filtrate

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Working Principle

The core of the screw press is a filtration structure composed of fixed rings and moving rings, with a screw shaft running through the center.

Key process stages:

1. Sludge Concentration Zone

   • Sludge is first thickened by gravity.

   • Initial water separation occurs.

2. Dewatering Zone

   • Screw pitch gradually decreases.

   • Internal pressure increases due to back pressure plate.

   • Water is squeezed out through narrow ring gaps.

3. Self-cleaning Mechanism

   • The rotation of the screw shaft drives moving rings.

   • Prevents clogging by continuously cleaning filter gaps.

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Technical Capability

The GN screw press is suitable for sludge concentrations ranging from: