Process Overview
Ballast water treatment systems (BWTS) are essential for preventing the transfer of invasive aquatic species and ensuring compliance with IMO and USCG regulations. Mechanical filtration serves as the primary treatment stage, removing suspended solids, organisms, and debris before downstream disinfection processes such as UV or chemical treatment.
CMI provides sintered metal filtration solutions designed for marine environments, offering reliable performance under high flow rates, corrosive seawater, and continuous shipboard operation.
Key Filtration Applications
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Primary Ballast Water Filtration • Removal of zooplankton, algae, and suspended solids • Reduction of turbidity prior to UV or chemical treatment • Stable filtration performance under fluctuating flow conditions Marine Corrosion-Resistant Filtration • Operation in high salinity and chloride-rich seawater • Resistance to pitting and crevice corrosion • Long-term reliability in offshore and marine environments High-Flow Shipboard Filtration Systems • Handling large ballast flow rates (thousands of m³/h) • Resistance to pressure surges and hydraulic shocks • Stable filtration without particle bypass or release Retrofit & Compact Marine Systems • Space-efficient filtration solutions for engine room integration • Suitable for retrofit BWTS installations • Reduced footprint compared to conventional filtration systems |
Filtration Challenges
BWTS applications involve harsh seawater conditions, high flow rates, and limited onboard space. Filtration systems must withstand corrosion, vibration, and hydraulic shock while maintaining consistent performance and regulatory compliance.
CMI Filtration Solutions
CMI sintered metal filters provide a robust and reliable filtration barrier for marine applications, ensuring long service life and stable operation under demanding conditions.
- Absolute filtration accuracy typically in the 20–50 μm range
- Excellent corrosion resistance (Super Duplex 2507, Titanium)
- High mechanical strength for vibration and pressure shock environments
- Backwashable design for continuous operation without manual intervention
- Optimized porosity for low pressure drop and energy efficiency
Technical Advantages
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Material Traceability Supplied with EN 10204 3.1 certification, supporting marine classification requirements (DNV, ABS, Lloyd's Register) Corrosion Resistance (PREN) Super Duplex and Titanium materials provide excellent resistance to pitting and crevice corrosion in seawater High Dirt Holding Capacity Extended operation between backwash cycles, even in high sediment environments Structural Stability Rigid sintered structure prevents deformation or particle release under vibration and pressure shock Compact Design High permeability enables smaller system footprint for marine retrofits |
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