The disc filter is utilized for the microfiltration of municipal and industrial wastewater to remove suspended solids during the tertiary treatment stage. It provides comprehensive filtration and removal of both total suspended solids (TSS) and phosphates.
Design and Operating Principle
Water enters the central drum, from where it is distributed by gravity through apertures in the drum wall to the filter discs. Due to the head differential between the inside and outside of the discs, the liquid permeates through the filter cloth, which retains solids exceeding the pore size while allowing the filtrate to pass. The gradual accumulation of contaminants on the cloth increases its hydraulic resistance.
The filter discs consist of cassettes with frames over which the filter cloth is tensioned. The passages between cassettes are separated by thin baffles that ensure unobstructed fluid flow. The filter elements are securely fixed within the cassettes using patented solutions that provide disc rigidity and stability while simplifying maintenance and reducing costs.
When the water level in the drum reaches a critical setpoint, signaling increased filter resistance, an automatic backwash cycle is initiated without interrupting the filtration process. High-pressure nozzles direct a spray of wash water onto the cloth to remove accumulated contaminants, utilizing the filtrate extracted by an integrated pump.
Particles washed off the filter cloth are collected in a reject water trough located inside the drum. From there, the contaminated water is discharged via an outlet pipe, effectively removing captured particles from the system. The filter discs are approximately 60% submerged, while the exterior filtrate level remains constant, contributing to stable and efficient filter operation.
The filters are available in two configurations: as a standalone unit with its own tank or as a model for integration into a channel or basin, facilitating implementation into existing systems.
Nearly all filter components are recyclable, reflecting a commitment to sustainable development and environmental responsibility.
The filter is designed to operate with coagulants and polymer flocculants, enhancing suspended solids removal efficiency and improving filtrate quality.
Specifications
| № | Parameter | Value |
|---|---|---|
| 1 | Filtration efficiency, μm | 10 |
| 2 | Maximum drum motor power, kW | 2,2 |
| 3 | Maximum pump motor power, kW | 22 |
| 4 | IP Rating | IP69 |
| 5 | Material | Stainless Steel Grades AISI 304, AISI 321, AISI 316 |
| 6 | Operating temperature range, °C | -40..+40 |
| 7 | Operating mode | Continuous or intermittent |
Application
- Tertiary treatment of biologically treated wastewater to meet discharge standards, including applications with chemical dosing.
- Pre-filtration upstream of UV disinfection systems.
- Polishing downstream of activated sludge flotation units.
- Aquaculture. Recirculating systems and fish farming in artificial reservoirs.
Features
- Patented cassette design and structural configuration.
- 100% open drum inlet. The absence of inlet turbulence enhances filtration efficiency and ensures uniform hydraulic loading across the filter discs.
- Stainless steel basin bottom. Ensures structural integrity and corrosion resistance.
- Innovative, robust construction characterized by simplicity and high reliability.
- Wear-resistant drum drive. A direct-drive system without belts or chains, reducing maintenance overhead and increasing uptime.
- Rapid and easy installation. Streamlined commissioning process.
- Exceptionally high throughput and processing capacity.
- Low maintenance costs. Minimal OPEX requirements.
- Extensive model range. A wide variety of frame sizes to meet any specific customer requirement.
- Variable pore size filter media. Customizable filter cloth options for specific filtration targets.
- Unified design architecture for both standalone (tank-version) and concrete-channel configurations.
- Full compatibility with existing wastewater treatment infrastructure.
- TSS reduction. Capable of reducing Total Suspended Solids from 500 mg/L to <10 mg/L, making effluent suitable for discharge or reclamation.
- Filtration range. Precision removal of particles from 10 to 300 μm.
- Low backwash water consumption. High-efficiency cleaning cycle with minimal filtrate loss.
- High performance-to-footprint ratio. High capacity within a compact design.
- Rapid segment replacement. Each filter segment can be replaced on-site quickly without structural disassembly of the filter unit.
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| Patented cassette design and construction | 100% open drum inlet | Stainless steel tank bottom | Wear-resistant direct drum drive |