Application Guide
Wastewater Filter Bags
Wastewater filter bags are used for removing suspended solids, sediment, and specific contaminants before water is reused or discharged.
Wastewater filter bags are used for removing suspended solids, sediment, and specific contaminants before water is reused or discharged. Understanding the proper selection and application of filter bags is essential for achieving optimal filtration performance while maintaining cost-effectiveness and regulatory compliance.
Applications of Wastewater Filter Bags
Filter bags are designed to capture solid particles from liquid streams, making them suitable across a wide range of industries:
- Industrial Wastewater: Removal of metal shavings, plastic fines, fibers, and chemical residues.
- Food & Beverage Processing: Filtering organic solids, fats, and oils from wash water or production effluent.
- Pharmaceutical and Chemical Plants: Capturing fine particulates, catalysts, and undissolved solids.
- Stormwater and Runoff Management: Removing sand, silt, and debris before water enters drainage systems.
- Recycling and Reuse Applications: Clarifying water for secondary use, such as cooling towers or cleaning.
Filter Bag Types and Materials
Polypropylene
Provides superior chemical resistance, particularly to acids and bases. Suitable for aggressive chemical environments and high-temperature applications up to 80°C in continuous service.
Polyester Felt
Suitable for most industrial high temperature wastewater applications up to 120°C. Provides good particle retention and dirt-holding capacity.
Nylon
Delivers targeted removal of particles, Ideal for straining applications. Also suitable for high temperature, up to 120°C.
Troubleshooting Common Issues
Premature Bag Failure
Causes include incorrect micron rating selection, chemical incompatibility, excessive pressure differentials, or installation errors. Systematic analysis of failure modes helps identify root causes and optimize selection criteria.
Poor Filtration Performance
Issues may stem from bag bypass, incorrect rating selection, or upstream process changes affecting particle characteristics. Regular monitoring and performance verification help identify performance degradation. Poor sealing of bags can allow unfiltered water to pass around the bag.
High Pressure Drop
Rapid pressure rise may indicate undersized bags, inappropriate micron rating, or changes in feed water characteristics. Consider system modifications or bag selection adjustments.
Chemical compatibility
Certain process streams may degrade polyester or nylon filter media, requiring polypropylene or specialty materials.
Temperature limitations
Elevated process water temperatures may exceed standard bag media ratings.
