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Turbidity in Water Treatment
  • 2025-07-22

Turbidity in Water Treatment

Multi-media filter

As a mature underground iron removal solution, the system achieves simultaneous removal of iron ions, turbidity, color and suspended solids through graded filter media layers (particle size 0.8-12mm). When combined with coagulation pretreatment, it can efficiently intercept 10-micron particles. Its backwash function ensures long-term operational stability and reduces the cost of treating a ton of water by more than 40%.

Green Sand Filter (GSF)

Adopts manganese sand catalytic oxidation technology to professionally remove Fe²⁺, Mn²⁺ and H₂S. Flexible system configuration:

Small units are equipped with Fleck®/Clack® automatic valves (service flow 2-5 GPM/ft²)

Medium-sized units use pneumatic diaphragm valves + digital display controllers

Large projects are equipped with PLC-controlled electric butterfly valve systems

Backwash intensity ≥12 GPM/ft², filter bed expansion rate 40%, and medium life extended by 3 times.

Industrial iron removal technology solution

Water source challenge

The iron content in groundwater often exceeds 5mg/L (national standard ≤0.3mg/L), and after oxidation, it forms Fe(OH)₃ colloid, which causes equipment scaling and pipeline corrosion. The multi-media filtration system can simultaneously solve the problem of excessive iron and manganese and protect the back-end RO membrane system.

Key points of project implementation

Filter material configuration: Green sand + quartz sand grading layer to achieve deep filtration

Backwash control: pressure difference/timing dual-mode automatic backwash

System integration: skid-mounted design saves 30% of floor space

Typical case: 42-inch double-tank iron removal system in Peruvian mine, with a processing capacity of 120m³/h

Key technology for turbidity control

Two-stage treatment process

Media filter

Removal rate: turbidity>95% (raw water ≤50NTU)

Filter material combination: anthracite + quartz sand + magnetite

Chemical cleaning-free design, 3-5 years replacement cycle

Ultrafiltration system

Filtration accuracy: 0.025 microns (bacterial retention rate>99.9%)

Integrated online turbidity monitoring (adjustable alarm threshold)

Self-provided backwash pump, membrane life>5 years

Solution selection

Water source type Recommended process Effluent index

Surface water (≤100NTU) Multi-stage media filtration SDI<5

Wastewater reuse Ultrafiltration + backwash system Turbidity <0.1NTU

Core Advantage Comparison

Media filter: Energy consumption per ton of water <0.1kW·h, no consumables cost

Ultrafiltration system: can handle high algae water sources, high degree of automation


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