Overview
Sewage tank filter paper is a critical component in industrial wastewater management systems. Engineered from cellulose fibers or synthetic polymers, it mechanically traps suspended solids while allowing liquids to pass through. The material is designed to withstand harsh chemical environments common in mining, textile, and food processing effluents. Modern variants often incorporate polypropylene or polyester layers for enhanced durability. Unlike standard filter papers, sewage tank versions prioritize high flow rates and clog resistance to handle large-volume applications. Their development aligns with stricter environmental regulations requiring efficient solid-liquid separation before discharge or recycling.
Physical and Chemical Properties
These filter papers exhibit a controlled pore structure ranging from 5–100 microns, customizable based on particle size distribution in the effluent. Their grammage typically falls between 80–200 g/m², balancing filtration efficiency with mechanical strength when wet. Chemically, premium grades resist pH extremes (2–12) and common industrial solvents. Additives like wet-strength resins prevent fiber breakdown during prolonged exposure to water. Some advanced formulations include antimicrobial treatments to inhibit biofilm formation, extending service life in biological wastewater systems.
Main Applications
Primary use cases include pretreatment filters for membrane systems in municipal plants, where they remove abrasive particles that could damage downstream equipment. In electroplating industries, they capture metal hydroxides from alkaline cleaning baths. The mining sector utilizes heavy-duty versions for tailings dewatering, often in press filters operating at 6–15 bar pressures. Food processors employ food-grade variants to recover proteins or starch from wash water. Emerging applications include landfill leachate treatment and shipboard bilge water filtration.
Safety and Storage
While chemically inert, spent filter papers containing heavy metals or organic pollutants require hazardous waste disposal per local regulations. Dry storage below 30°C prevents mold growth in cellulose-based products. Workers should use dust masks when cutting large rolls to avoid respiratory irritation from loose fibers. For acidic/alkaline wastewater streams, verify the material’s chemical compatibility charts to prevent premature degradation. Always conduct pilot tests with actual effluent to assess real-world performance.
B2B Procurement Guide
Key specifications to request include: ISO 19403-1 wetting tension (≥36 mN/m for oily wastewater), EN 29073-3 bursting strength (≥300 kPa), and DIN 53112 water absorption rate. For automated systems, check roll dimensions compatibility with your filter press. Bulk purchases (palletized rolls) typically offer 15–30% cost savings. Consider suppliers providing technical support for effluent analysis and custom die-cutting services. Leading manufacturers include Ahlstrom-Munksjö’s industrial fluid filtration series and Hollingsworth & Vose’s Technostat® line.
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