Multi-Media Filter

Our Multi-Media Filter (also known as graded sand filter) is a high-efficiency pressure-type water treatment device specially designed for removing suspended solids, colloids, silt, rust, algae and other particulate impurities in water. 

Adopting a layered depth filtration structure, it is filled with three or more kinds of filter media with different particle sizes and densities (commonly anthracite, quartz sand, garnet) in the pressure vessel, which realizes progressive filtration from coarse to fine. Unlike single-medium filters, this product makes full use of the entire filter bed depth to capture impurities, effectively reducing water turbidity and SDI value, and providing stable, high-quality pre-treated water for reverse osmosis systems, ion exchange devices, softeners, boilers and other downstream water treatment equipment. It is a core pre-filtration equipment widely used in industrial and municipal water treatment scenarios, with stable performance and strong adaptability to various water quality conditions.

Technical Features

This multi-media filter integrates mature water treatment technology and optimized structural design, with stable performance and reliable operation. Its core technical indicators and structural features are clearly presented in the table below, covering key parameters that overseas customers focus on, to help you quickly grasp product performance advantages:

Core Advantages

High Filtration Efficiency & Large Contaminant Holding Capacity: Compared with traditional single-medium sand filters, the multi-layer graded media design distributes filtration load across the entire bed depth, capturing more impurities and extending the operation cycle before backwashing. It can remove up to 99% of suspended solids under suitable working conditions, ensuring stable effluent quality and avoiding frequent equipment maintenance caused by excessive impurity accumulation.

Low Operation & Maintenance Cost: The filter media can be reused for a long time through regular backwashing, without frequent replacement; the equipment has a simple structure, few wearing parts, and low daily maintenance workload. Automatic operation mode reduces manual intervention, saving labor costs for enterprises and optimizing overall water treatment costs.

Strong Corrosion Resistance & Long Service Life: We select high-quality corrosion-resistant materials for the tank body and internal fittings, which can adapt to weakly acidic, weakly alkaline and other conventional water quality environments, not easy to rust or deform. The robust structural design ensures stable operation for more than 10 years under normal use and maintenance, reducing equipment replacement investment.

Strong Adaptability & Flexible Customization: We can customize filter media combination, treatment flow, vessel material, control mode and other parameters according to customers' actual water quality, treatment demand and installation space, whether it is small-scale commercial water treatment or large-scale industrial water plant transformation, it can meet personalized needs.

Energy Saving & Environmental Protection: The equipment runs with low energy consumption, and the backwashing water can be recycled after simple treatment, reducing water resource waste. It does not produce chemical pollutants during operation, complying with international environmental protection standards for industrial water treatment, and helping enterprises achieve green production.

Application Areas

Our multi-media filter has wide applicability and is widely used in various water treatment fields that need to remove suspended solids and reduce turbidity, covering municipal engineering, industrial production, food hygiene, environmental protection and other industries, the main application scenarios include:

Municipal Water Treatment: Tap water plant pre-filtration, river water and groundwater purification, urban reclaimed water recycling, to provide safe and clean domestic water for residents.

Industrial Circulating Water Treatment: Cooling circulating water filtration, boiler feed water pre-treatment, to prevent pipeline blockage and equipment scaling caused by impurities, extending the service life of industrial equipment.

Food & Beverage Industry: Purification of production water for beverages, dairy products, edible oil and other products, meeting food-grade water quality standards and ensuring product safety.

Chemical & Pharmaceutical Industry: Pre-filtration of process water in chemical plants, pharmaceutical factories, removal of particulate impurities to avoid affecting product synthesis and drug quality.

Seawater Desalination Pre-treatment: Removal of suspended solids and silt in seawater, reducing the pollution load of reverse osmosis membranes and improving the efficiency and service life of desalination equipment.

Wastewater Treatment & Reuse: Tertiary treatment of industrial wastewater, domestic sewage, filtration of effluent after biochemical treatment to meet wastewater discharge or recycling standards.

Frequently Asked Questions (FAQ)

Q1: How often should the filter media of the multi-media filter be replaced?

A1: Under normal working conditions, the filter media can be used for 3-5 years. The specific replacement cycle depends on the influent water quality and operation frequency: if the influent suspended solids content is high, the backwashing frequency needs to be increased appropriately, and the media should be replaced when the filtration efficiency drops significantly and backwashing cannot restore performance. We will also provide detailed media maintenance guidelines according to your actual working conditions.

Q2: Is professional installation and commissioning required for this equipment?

A2: Our multi-media filter is designed for easy installation, with detailed installation drawings and operation manuals. For small-scale standard models, customers can complete installation and commissioning independently with basic mechanical and electrical knowledge; for large-scale customized models, we can provide remote technical guidance or on-site installation commissioning services (charged separately according to project demand) to ensure normal operation of the equipment.

Q3: What kind of water quality is this filter suitable for? Can it handle high-turbidity raw water?

A3: It is suitable for most surface water (river water, lake water), groundwater, industrial circulating water and other conventional water quality, and can handle raw water with turbidity ≤ 50NTU directly. For high-turbidity water quality (turbidity > 50NTU), we recommend adding a pre-sedimentation tank or grid device to reduce the filtration load, and we can also customize enhanced filtration models for high-turbidity scenarios.

Q4: What is the daily operation cost of the multi-media filter?

A4: The daily operation cost mainly includes electricity consumption and backwashing water consumption. Taking a 10m³/h standard model as an example, the daily power consumption is less than 5kW·h, and the backwashing water consumption accounts for about 3%-5% of the treated water volume. The overall operation cost is extremely low, far lower than other filtration equipment with the same treatment capacity.

Q5: Can you customize the multi-media filter according to our special project requirements?

A5: Yes, we support fully customized services. You can provide parameters such as treatment flow, influent water quality, installation space, vessel material requirements and control mode, and our technical team will design a personalized filtration solution and produce corresponding equipment to perfectly match your project needs.

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