SINOKLE Dual-media Filter: Reliable Choice for Oily Wastewater Deep Treatment

In oily wastewater treatment scenarios such as oilfield produced water, petrochemical refining, and metallurgy/chemical industry, conventional single-layer filters often face pain points of uneven dirt holding, easy clogging, limited filtration precision, incomplete backwashing, and unstable effluent, making it difficult to meet deep-treatment and stable-compliance needs.

SINOKLE (Shenzhen) Technology Co., Ltd. has launched the dual-media (dual-filter) filter, adopting a two-layer graded media combination of anthracite + garnet, together with core advantages such as combined air-water backwashing, fully automatic operation, and compact integrated structure, to achieve efficient deep interception of suspended solids and oil. With clearer effluent, more stable operation, and simpler maintenance, it is standard filtration equipment for the deep treatment of industrial oily wastewater.

I. Technical Core: Dual-layer Gradation · Whole-filter Dirt Holding for More Efficient Filtration

The SINOKLE dual-media filter adopts the classic dual-media combination of upper-layer anthracite + lower-layer garnet, forming an ideal graded filter bed of coarse-to-fine from top to bottom:

• Upper-layer anthracite: larger particle size and lower density, responsible for coarse dirt holding and stable-flow distribution, reducing the lower-layer load.

• Lower-layer garnet: finer particle size and higher density, performing fine filtration and deep interception to guarantee effluent precision.

Wastewater passes evenly downward through the filter bed, and oil and suspended solids are captured and retained stage by stage; backwashing uses combined air-water action, keeping the media layers from mixing and achieving thorough regeneration, maintaining a highly efficient filtration state over the long term and truly realizing whole-filter dirt holding and high-precision stable effluent.

II. Eight Core Advantages, Comprehensively Leading Single-layer Filters

High filtration precision

Stably removes fine particles ≥2 µm, with suspended-solids removal efficiency as high as 98% and effluent oil and SS both ≤5 mg/L—excellent water quality.

Strong dual-layer dirt holding

The rational combination of anthracite and garnet gives high filter-bed utilization and dirt-holding capacity far exceeding single-layer media, with longer filtration cycles.

More thorough air-water backwash

Combined air-water backwash provides strong disturbance and clean washing, good media regeneration, and rapid recovery of filtration performance.

Flexible capacity expansion

Supports series / parallel combinations and free configuration by treatment capacity, adapting to various wastewater treatment systems from small to large.

Fully automatic stable operation

Supports local/remote fully automatic control and timed/differential-pressure automatic backwash, reducing manual intervention for smooth and reliable operation.

Compact structure, small footprint

High overall integration and complete supporting facilities with a small footprint, especially suitable for retrofit of old projects and space-constrained sites.

Simple operation and maintenance

Simple process, easy backwashing, not prone to hardening or clogging, small maintenance workload, and lower comprehensive operating cost.

Wide applicability

Dual-use for clear and wastewater, covering deep-filtration needs across oilfield, refining, metallurgy, chemical, textile, and other industries.

III. Key Technical Parameters

• Single-unit capacity: 5–150 m³/h

• Design pressure: 0.6–2.0 MPa

• Design temperature: ≤80°C

• Filtration resistance: ≤0.12 MPa

• Influent indicators: oil ≤50 mg/L, SS ≤50 mg/L

• Effluent indicators: oil ≤5 mg/L, SS ≤5 mg/L

• Suspended-solids removal rate: 98%

• Removable particle size: ≥2 µm

• Backwash mode: combined air-water backwash

IV. Technical Comparison: Dual-media Filter VS Single-layer Filter

V. Typical Application Scenarios

It can be perfectly paired with front-end equipment such as the CDFU hydrocyclone dissolved-air flotation, the HCC hydrocyclone coalescer, and the high-efficiency coalescing de-oiler to form a whole-process solution of pre-treatment + deep filtration, and is widely used in:

• Oilfield produced water, fracturing flowback fluid, oily wastewater reinjection fine filtration

• Petrochemical/refining desalter draw-off water, tank-farm wastewater deep treatment

• Deep purification of industrial wastewater from metallurgy, chemical, and textile

• Side-stream filtration of circulating water, reclaimed-water reuse, clear-water pre-treatment systems

VI. SINOKLE: Protecting Industrial Water Treatment with Mature Filtration Technology

SINOKLE (Shenzhen) Technology Co., Ltd. focuses on the oily wastewater treatment field, adheres to the product philosophy of stable reliability, economic efficiency, and easy O&M, and has built a series of core equipment such as the dual-media filter, the high-efficiency fiber-ball filter, the KFM activated-media filter, and the CDFU hydrocyclone flotation, providing industrial customers with one-stop overall water-treatment solutions.

With the mature advantages of high precision, strong dirt holding, easy backwashing, and wide adaptability, the SINOKLE dual-media filter has operated stably over the long term in numerous oilfield and petrochemical projects, won market recognition through high cost-performance and high reliability, and helps enterprises achieve stable effluent, simple O&M, and low cost.

Choose the SINOKLE dual-media filter and choose a more stable, more efficient, and more worry-free deep-filtration solution!