10μm & 20μm Polypropylene Filter Cartridge for Reclaimed Water and Wastewater Treatment: Sediment and Rust Removal in Industrial Circulating Water Systems

Product Introduction

This dual-specification 10μm and 20μm PP wound filter cartridge is a professional industrial filtration component engineered for reclaimed water, wastewater treatment and sediment & rust removal in industrial circulating water systems, tailored to the high-impurity, large-flow and complex operating characteristics of industrial water treatment scenarios. Crafted from 100% high-purity industrial-grade polypropylene (PP) resin via a precision spiral winding process on a reinforced rigid PP inner support core, it features an adhesive-free integral forming structure and a graded porous filtration layer optimized for 10μm and 20μm precision interception respectively. Its core function is to efficiently remove insoluble solid impurities such as sediment, rust, scale debris, suspended solids and fine mechanical particulates from reclaimed water, treated wastewater and industrial circulating water, preventing pipeline scaling, equipment blockage, heat exchange efficiency reduction and pump impeller wear in industrial systems. Compatible with standard 10/20/30/40-inch single/multi-core industrial filter housings (PP/304/316 stainless steel), it complies with industrial water treatment material standards, has excellent chemical and structural stability, and causes no secondary pollution to the water body. As a cost-effective coarse and fine filtration core component, it is an indispensable filtration product for optimizing industrial water reuse efficiency, reducing water consumption and ensuring the stable operation of industrial circulating water systems.

Filtration Precision

This filter cartridge is available in two fixed nominal filtration precisions—10μm and 20μm, both scientifically calibrated for the impurity removal demands of reclaimed water/wastewater treatment and industrial circulating water sediment & rust removal. The 10μm specification achieves over 98% interception of solid particulate impurities with a particle size of 10μm and above, targeting fine sediment, micro rust particles, fine suspended solids (SS) and colloidal particulates in reclaimed water and low-turbidity industrial circulating water; the 20μm specification realizes over 95% interception of 20μm and above impurities, focusing on removing coarse sediment, large rust flakes, scale debris and bulky mechanical particulates in raw wastewater and high-impurity industrial circulating water. Through high-precision winding and uniform pore size distribution, both specifications ensure consistent filtration precision without deviation under long-term continuous operation, and the dual-precision design provides flexible selection for industrial water treatment systems with different water quality and filtration process requirements—10μm for fine filtration after coarse treatment, 20μm for primary coarse filtration to reduce the load of subsequent precision filtration links, perfectly matching the multi-stage filtration demand of industrial water treatment.

Flux

Under the standard industrial operating conditions of 25℃ ambient temperature and 0.25MPa inlet pressure (matching the working pressure of industrial water treatment and circulating water systems), the nominal flux of both 10μm and 20μm filter cartridges is calibrated by physical specification, with the 20μm specification having a slightly higher flux due to its relatively loose filtration layer: the 10-inch model (10μm: 10-15 L/min; 20μm: 12-18 L/min), 20-inch model (10μm: 20-28 L/min; 20μm: 25-35 L/min), 30-inch model (10μm: 35-45 L/min; 20μm: 40-50 L/min), 40-inch model (10μm: 55-65 L/min; 20μm: 65-80 L/min). The large-flux design is fully adapted to the high-water-volume characteristics of reclaimed water/wastewater treatment and industrial circulating water systems, supporting continuous 24-hour operation and multi-core parallel use (the total flux can be linearly scaled up by increasing the number of cartridges) to meet the ultra-large-flow demand of large-scale industrial water treatment projects. The optimized internal flow channel structure minimizes water flow resistance for both specifications, ensuring stable flux during service life and avoiding insufficient water supply in industrial circulating water systems caused by flux attenuation.

Salt Rejection Rate

As a physical filtration component dedicated to insoluble impurity removal in reclaimed water/wastewater treatment and industrial circulating water systems, both 10μm and 20μm PP wound filter cartridges are designed only for particle size-based interception of solid contaminants (sediment, rust, suspended solids) and have no ion separation, desalination or salt rejection functional design. Therefore, this product has no salt rejection rate index. All dissolved inorganic salts, metal ions, small molecule soluble substances, water treatment agent residuals and dissolved solids (TDS) in the water body can pass through the cartridge body smoothly. This functional positioning is highly consistent with the core demand of industrial water treatment and circulating water filtration—focusing on removing particulate impurities that damage equipment and affect system operation, without changing the soluble ion composition and chemical balance of the water body, and avoiding unnecessary interference with the subsequent water reuse and treatment process of reclaimed water and wastewater.

Pressure Drop

The initial pressure drop of new 10μm and 20μm filter cartridges under standard nominal flux and 25℃ operating temperature is optimized for industrial large-flow filtration, with the 20μm specification having a lower initial pressure drop due to its coarser precision: 10μm (≤0.03MPa for all specifications), 20μm (≤0.025MPa for all specifications). Both values are far lower than the pressure drop limit of industrial water treatment and circulating water systems, ensuring minimal pressure loss of the water body in the filtration link, reducing the energy consumption of water pumps and booster equipment, and avoiding excessive pressure load on industrial pipelines and equipment. With continuous system operation, impurities are intercepted and accumulated on the filtration layer surface and inside, leading to a gradual rise in pressure drop for both specifications. The recommended maximum operating pressure drop is 0.15MPa for all models and precisions; when the pressure drop reaches this value, the cartridge must be cleaned or replaced in time. Delayed replacement will cause excessive system pressure loss, reduced water flow, increased pump energy consumption, and even filter cartridge blockage and equipment failure due to impurity accumulation.

Molecular Weight Cutoff (MWCO)

Both 10μm and 20μm PP wound filter cartridges adopt a pure physical filtration mechanism based on particle size interception, whose core working principle is to capture insoluble solid particulate impurities according to their actual physical size in the water body, rather than separating substances based on molecular weight or molecular size—this is fundamentally different from ultrafiltration (UF), nanofiltration (NF) and reverse osmosis (RO) membrane components used in advanced reclaimed water treatment with specific Molecular Weight Cutoff (MWCO) indexes. Therefore, this product has no specific MWCO index for either precision. The interception effect is only targeted at solid particulates with particle sizes of 10μm/20μm and above; macromolecular organic substances, soluble colloids, dissolved polymers and other dissolved substances in reclaimed water, wastewater and industrial circulating water can pass through the cartridge body smoothly as long as their actual particle size is smaller than the filtration precision, and then enter subsequent treatment links (if needed) for professional molecular weight-based separation. This design fully meets the functional requirements of coarse/fine filtration in industrial water treatment, which only needs to remove physical particulate impurities without participating in the molecular level purification of the water body.

Membrane Thickness

The effective PP filtration layer thickness of this filter cartridge is optimized according to filtration precision and physical specification, with the 10μm specification having a slightly thicker filtration layer for fine impurity interception, and the 20μm specification with a moderate thickness for large-flux coarse filtration, both matching the internal size of standard industrial filter housings:

10μm precision: 10-inch (7-10mm), 20-inch (10-13mm), 30-inch (13-17mm), 40-inch (16-20mm)
20μm precision: 10-inch (6-8mm), 20-inch (9-11mm), 30-inch (12-15mm), 40-inch (15-18mm)

The total outer diameter of all specifications and precisions is the industry standard 63mm/70mm/90mm, ensuring perfect fit with standard 10/20/30/40-inch industrial filter housings and no water short-circuit during installation. The thickened filtration layer of the 10μm model forms a dense multi-layer graded interception structure to ensure fine impurity removal efficiency and sufficient impurity holding capacity; the moderate thickness of the 20μm model optimizes flow channel space while ensuring coarse impurity interception, achieving a balance between large flux and impurity storage. The inner support core for all models is made of reinforced rigid PP material with a thickness of 4-6mm (matching specification), with excellent pressure resistance and structural stability, able to withstand 0.8MPa operating pressure without deformation or rupture, ensuring no filtration layer damage and precision loss under industrial system pressure fluctuations.

Replacement Cycle

The recommended standard replacement cycle of this 10μm/20μm filter cartridge is determined by filtration precision, physical specification and the actual water quality of industrial water treatment/circulating water systems, with the 20μm coarse filtration model having a slightly longer cycle due to lower impurity interception density:

10μm precision: 10/20-inch models (small/medium-sized systems, turbidity ≤10 NTU) → 2-4 months; 30/40-inch models (large-scale systems, turbidity ≤15 NTU) → 3-5 months
20μm precision: 10/20-inch models (small/medium-sized systems, turbidity ≤15 NTU) → 3-5 months; 30/40-inch models (large-scale systems, turbidity ≤20 NTU) → 4-6 months

The actual replacement cycle is closely related to water impurity content: for high-impurity water (turbidity ＞20 NTU, SS ＞30 mg/L) such as raw wastewater and heavily rusted industrial circulating water, the cycle is shortened by 1-2 months for both precisions; for low-impurity water (turbidity ＜8 NTU, SS ＜15 mg/L) such as advanced treated reclaimed water, the cycle can be appropriately extended by 1 month. Regular physical backwashing (clean water/compressed air) can remove most surface accumulated impurities, extending the replacement cycle by 1-2 months for both precisions under the premise of ensuring filtration efficiency. Once the system pressure drop reaches 0.15MPa, the cartridge must be replaced immediately regardless of actual use time to ensure stable system operation.

Features

This 10μm/20μm PP wound filter cartridge has a number of professional performance features adapted to reclaimed water/wastewater treatment and industrial circulating water sediment & rust removal, with the core advantage of dual-precision adaptation and industrial-grade stability:

Dual fixed precision for flexible selection: 10μm for fine filtration of reclaimed water/low-impurity circulating water, 20μm for coarse filtration of raw wastewater/high-impurity circulating water, meeting the multi-stage filtration demands of different industrial water treatment processes and realizing targeted impurity removal.
100% industrial-grade high-purity PP raw material: Adopts food-grade and industrial-grade dual-standard PP resin, acid and alkali resistant (pH 1-14), corrosion resistant to common industrial water treatment chemicals (flocculants, scale inhibitors, disinfectants), with excellent chemical stability and long service life in complex industrial water quality environments.
Adhesive-free integral winding forming: No adhesives, binders or glues in production, avoiding organic solvent dissolution and secondary water pollution, while ensuring structural firmness—no delamination, cracking or filtration layer shedding under long-term high-flow and pressure fluctuation operation.
Reinforced pressure-resistant structure: Honeycomb-reinforced rigid PP inner support core, able to withstand 0.8MPa high operating pressure, adapting to the pressure fluctuation characteristics of industrial circulating water and water treatment systems, no deformation or rupture to ensure filtration precision stability.
Large flux with low pressure drop: Optimized flow channel and graded filtration layer design for both precisions, realizing industrial large flux with ultra-low initial pressure drop, reducing water pump energy consumption and meeting the high-water-volume demand of continuous industrial operation.
High impurity holding capacity: Thickness-optimized filtration layer forms a three-dimensional porous interception structure, with large impurity storage space for both precisions, effectively delaying pressure drop rise and reducing cleaning/replacement frequency to save industrial operation and maintenance costs.
Backwashable and reusable: Rigid and dense winding structure supports repeated physical backwashing (clean water rinsing/compressed air blowing), removable of most surface and shallow accumulated impurities, extending service life and improving cost performance.
Universal industrial compatibility: Matches all standard 10/20/30/40-inch single/multi-core industrial filter housings (PP/304/316 stainless steel), unified installation specifications, easy disassembly and replacement without professional tools, suitable for large-scale industrial promotion and application.
Eco-friendly and recyclable: Whole cartridge made of single PP material, free of heavy metals and toxic additives, discarded cartridges can be recycled and harmlessly treated, in line with the green and low-carbon operation requirements of modern industry.

Application Fields

This 10μm/20μm PP wound filter cartridge is a dedicated dual-precision filtration component for reclaimed water/wastewater treatment and industrial circulating water sediment & rust removal, and its core application fields cover all industrial scenarios with water reuse, wastewater treatment and circulating water system operation demands:

Industrial circulating water systems: Applied to sediment and rust removal in cooling circulating water, freezing circulating water and process circulating water systems of steel, chemical, petrochemical, power generation and machinery manufacturing industries, preventing pipeline scaling and equipment wear to improve heat exchange efficiency.
Reclaimed water treatment projects: Used in the coarse/fine filtration link of municipal and industrial reclaimed water treatment systems (sewage reuse, industrial wastewater recycling), 20μm for primary coarse filtration to remove large impurities, 10μm for fine filtration after coarse treatment to improve reclaimed water clarity for subsequent reuse.
Industrial wastewater pretreatment/advanced treatment: Applied to the pretreatment of high-concentration industrial wastewater (printing and dyeing, papermaking, electroplating) to remove sediment and rust, reducing the load of subsequent advanced treatment (UF/NF/RO); also used in the advanced filtration of treated wastewater to meet the standard of indirect discharge or water reuse.
Petrochemical industry water treatment: Used in the filtration of oilfield produced water, refinery circulating water and chemical process water, removing solid particulates such as sediment and rust to protect oilfield pumps, refinery heat exchangers and chemical production equipment.
Power plant water treatment: Applied to the sediment and rust removal of power plant cooling circulating water, condensate pre-treatment and desalination system raw water filtration, ensuring the safe operation of power plant boiler and turbine equipment.
Metallurgical industry water treatment: Used in the filtration of smelting circulating water, steel mill cooling water and metallurgical wastewater, adapting to the high-impurity water quality characteristics of the metallurgical industry and realizing efficient particulate impurity removal.
Commercial and industrial central air conditioning systems: Applied to sediment and rust removal in central air conditioning cooling circulating water systems of shopping malls, office buildings and industrial plants, preventing condenser and evaporator blockage to improve air conditioning operation efficiency.
Water supply pretreatment for industrial equipment: Used in the raw water pre-filtration of industrial water pumps, heat exchangers, water chillers and other water-using equipment, protecting the core components of equipment from impurity damage and extending equipment service life.

Conclusion

In summary, this 10μm & 20μm polypropylene filter cartridge is a high-performance, cost-effective dual-precision industrial filtration component specially developed for reclaimed water/wastewater treatment and sediment & rust removal in industrial circulating water systems, and is an indispensable core filtration product for promoting industrial water reuse, reducing water resource consumption and ensuring the stable, efficient and low-energy operation of industrial water-using systems. Its dual fixed precision design (10μm/20μm) provides flexible and targeted filtration solutions for different industrial water treatment processes and water quality conditions: the 20μm specification serves as an efficient primary coarse filtration core to remove large sediment, rust and bulky impurities, reducing the load of subsequent treatment links; the 10μm specification acts as a reliable fine filtration barrier to capture fine particulates, improving water clarity and meeting the quality requirements of reclaimed water reuse and low-impurity circulating water operation. Crafted from 100% high-purity industrial-grade PP resin with an adhesive-free integral winding process, it has excellent chemical and structural stability, complies with industrial water treatment standards, and causes no secondary pollution to the water body, adapting to the complex water quality environment of reclaimed water, wastewater and industrial circulating water. With the advantages of industrial large flux, ultra-low initial pressure drop, reinforced pressure resistance, backwashable performance and universal industrial compatibility, it is fully adapted to the high-water-volume, continuous operation and pressure fluctuation characteristics of industrial systems, reducing pump energy consumption and operation and maintenance costs while realizing efficient impurity removal. Widely applicable to steel, chemical, power generation, petrochemical and municipal reclaimed water treatment projects, this dual-precision PP wound filter cartridge perfectly balances filtration efficiency, flux and cost performance, and is the first choice for coarse/fine filtration and sediment & rust removal in reclaimed water/wastewater treatment and industrial circulating water systems with different impurity removal demands.

Related products

The matching related products of this 10μm/20μm PP wound filter cartridge are all core components, supporting equipment and auxiliary materials of industrial reclaimed water/wastewater treatment and circulating water systems, forming a complete industrial water treatment filtration product system adapted to multi-stage impurity removal:

Industrial-grade melt-blown PP filter cartridges: 5μm/30μm/50μm melt-blown PP filter cartridges of the same 10/20/30/40-inch specifications, matching this wound cartridge to form a multi-precision coarse/fine filtration system for industrial water treatment with different impurity removal requirements.
Standard industrial filter housings: 10/20/30/40-inch single/multi-core (2/4/6/8 core) filter housings made of 304/316 stainless steel and anti-corrosion PP plastic, special supporting equipment for this cartridge, with pressure gauge interfaces and drain valves for real-time operating status monitoring.
Industrial water treatment chemicals: Flocculants (PAC/PAM), scale inhibitors, corrosion inhibitors, bactericides and algaecides for industrial circulating water and reclaimed water treatment, matching with this cartridge to optimize water quality, reduce impurity content and slow down filter cartridge blockage.
Backwashing and cleaning equipment: High-pressure backwash pumps, air compressors, filter cartridge cleaning tanks and backwash pipelines, used for physical backwashing of this cartridge to remove accumulated impurities and extend service life.
Water quality monitoring instruments: Industrial online turbidity meters, suspended solid (SS) detectors, pressure transmitters and flow meters, real-time monitoring of water quality and cartridge operating pressure drop, facilitating automatic alarm and timely maintenance/replacement.
Industrial water circulation and booster equipment: Frequency conversion centrifugal pumps, booster pumps, pressure stabilizing tanks and check valves, matching with this cartridge to ensure stable water flow and pressure for industrial circulating water and water treatment systems.
Advanced reclaimed water treatment membrane components: UF/NF/RO membrane elements and membrane shells of standard specifications, used in the advanced treatment link of reclaimed water after this cartridge’s filtration, realizing molecular level purification for high-standard water reuse.
Pipeline and filtration accessories: Acid and alkali resistant silicone gaskets, stainless steel quick connectors, high-pressure ball valves, Y-type coarse filters and filter cartridge pullers, used for installation, sealing and primary coarse filtration of this cartridge and filter housings, protecting the filtration system and industrial pipelines.
Multi-media filtration equipment: Industrial quartz sand filters, activated carbon filters and manganese sand filters, matching with this cartridge to form a multi-stage physical filtration system for reclaimed water/wastewater pretreatment, further improving impurity removal efficiency.
Industrial water treatment complete sets: Integrated reclaimed water treatment equipment, industrial circulating water filtration units and wastewater pretreatment skids equipped with this 10μm/20μm cartridge, providing turnkey industrial water treatment solutions with compact structure and easy operation.

10μm PP wound filter cartridge 11. 20μm Polypropylene Filter Cartridge for Reclaimed Water and Wastewater Treatment: Sediment and Rust Removal in Industrial Circulating Water Systems