Anti-corrosion Screw Press Aerobic Sludge Dewatering for Biochemical Pharmacy

Technical Overview

BOEEP's corrosion-resistant spiral press aeration sludge dewatering system integrates both sludge concentration and dewatering functions within a single unit, capable of processing activated sludge from aerobic or anaerobic treatment. Its design incorporates fixed and movable ring plates paired with a spiral shaft structure, enabling continuous operation from the concentration stage to the dewatering stage. This reduces sludge volume while increasing solids content.

Anti-clogging & Corrosion-resistant Design

Dynamic and static ring plates form an anti-clogging structure, preventing filter gap blockage and reducing cleaning frequency.

All sludge-contact components (including screw shafts and ring plates) utilize corrosion-resistant materials (e.g., stainless steel SS304/SS316 or higher-grade corrosion-resistant alloys), suitable for sludge environments containing oils, acids, alkalis, or complex chemical compositions.

Filter-Type Design Replaces traditional filter cloth or centrifugal dewatering methods with a more compact structure and easier maintenance.

Automation & Operational Efficiency

The system includes: high-efficiency flocculant dosing unit, sludge feed pump, cake discharge device, electrical control panel, and other components, providing fully automated control of sludge feeding, concentration, dewatering, and residue discharge processes.

Operates at a slow speed with a screw shaft rotation rate of approximately 2-3 rpm, minimizing vibration and noise while preventing odor dispersion for a comfortable environment.

Operates stably with minimal manual intervention, reducing labor costs and operational error risks.

Wide Application & Cost-Effectiveness

Suitable for sludge treatment across diverse industries including: biochemical/pharmaceutical plants, wastewater treatment facilities, municipal sludge, food & beverage, bioprocessing, petrochemicals, pulp & paper, and tanneries. Particularly effective for dewatering high-density, low-density, and oily sludge.

Reduces capital investment: Incorporates concentration functionality, enabling direct processing of sludge from aeration tanks without requiring separate thickening tanks or large sludge storage areas. Minimizes footprint and civil engineering costs.

Lowers operating expenses: Low-speed screw press design minimizes energy consumption; anti-clogging features reduce cleaning frequency and water usage; high automation decreases manual intervention.

Brief Working Principle

Sludge enters the thickening section from aeration tanks or feed pumps (the area between the fixed and movable ring plates at the front end).

As the sludge enters the screw press component, the filter gap gradually narrows, mechanically squeezing out water.

The sludge volume progressively decreases and its moisture content lowers, ultimately being discharged as a sludge cake.

The entire process is automatically controlled, eliminating the need for frequent shutdowns or manual cleaning. Only periodic inspections and light maintenance are required.

Application Scenarios and Case Studies

Biochemical pharmaceutical plants treat activated sludge from aeration tanks to reduce sludge disposal volume and enhance resource recovery efficiency.

Municipal wastewater treatment plants replace filter cloth presses or centrifuges during sludge dewatering, improving reliability while reducing maintenance workload.

Oily chemical or paper mill sludge scenarios maintain stable dewatering performance despite complex sludge properties.