There are several common types of filter media, including the following

1. Quartz sand filter material

Quartz sandAs a pre-treatment for pure water equipment and ultrafiltration equipment, it mainly involves intercepting and adsorbing sediment, colloids, metal ions, and organic matter through the filtration layer. Commonly used in general water treatment, it is widely used due to its pollution-free, low price, and low operating cost.

2. Activated carbon filter material

Activated carbon is a type of very small carbon particle with large micropores per unit area, commonly known as capillary pores. This type of capillary tube has strong adsorption capacity, and due to the large surface area of carbon particles, it comes into full contact with impurities in water. These impurities can be adsorbed in micropores, thereby removing colloids and other impurities from water. Activated carbon can also adsorb CL ions and ozone in water, and has a certain adsorption capacity for organic matter in water. It can significantly adsorb pigments in water. In the water treatment industry, we generally require an iodine value of over 700mg, and such activated carbon has strong adsorption capacity.

3. Smokeless coal

Anthracite is carefully selected from deep well minerals and has the highest percentage of carbon content. The anthracite filter material used for water treatment is manually classified, filtered, and washed to reduce irrelevant minerals and ash content, ensuring its suitability for water filtration. It has a good appearance luster, is in the form of polygonal particles, and has strong compressive and wear-resistant properties. Due to the good solid particle retention ability of anthracite filter material, it can reliably improve the ability to remove suspended particles. In addition, its low uniformity coefficient helps to accelerate the flow rate.

4. Manganese sand filter material

Manganese sand filter mainly relies on its own catalytic effect of manganese sand, and also gradually forms a layer of iron filter membrane on the surface of manganese sand filter as an active filter membrane during filtration, which can play a catalytic role. The newly generated iron oxide serves as the active filter membrane material and participates in the new catalytic iron removal process, so the iron removal process by the active filter membrane is an automatic catalytic process. Mainly used for groundwater treatment, circulating water treatment grade sewage treatment, etc.

5. Fiber ball

The porosity of fiber balls in the fiber ball filter accounts for about 93% of the filter material layer. When the fiber ball filter is running, the water flows up and down. Due to the resistance of the water passing through the filter layer, the filter material forms an ideal gap structure with a tight top and bottom. It not only has a large flux, but also increases the interception ability. It effectively removes suspended solids and sediment in water, and has a significant removal effect on organic matter, colloids, iron, manganese, etc. This product is used for fine filtration of oily wastewater in oil fields. It has a large filtration flux and fiber balls are not easy to stick to oil, so it is widely used in the petrochemical industry.
Overall, among these types of filter media, quartz sand has the advantages of high density, small particle size, and low cost. Anthracite has the characteristics of low density, strong pollutant interception ability, large particle size, and relatively affordable price. It is a filtering medium between quartz sand and activated carbon filter media. Activated carbon has a low density and strong odor and decolorization ability, but it is relatively expensive. Generally used in drinking water, in addition to the above effects, it can also improve the taste of water. Fiber ball filters are used for high flow, oil removal, and suspended solids removal in water treatment systems. Manganese sand filter media is mainly used to remove iron and manganese from water and is commonly used in groundwater wellswater treatmentSystem and circulating water treatment system.


1. Activated carbon filter

1、 Product Introduction
Activated carbon filter is one of the main equipment for water quality pretreatment, usually used together with quartz sand filter The surface of activated carbon contains a large number of light functional groups, which can chemically adsorb and remove odors, organic matter, colloids, iron, and residual chlorine from water with various properties. At the same time, it reduces the turbidity and chromaticity of water, making the water clear and transparent, and reducing pollution from subsequent systems such as reverse osmosis, ultrafiltration, and ion exchangers.
2、 Product Features
The device has a simple structure, easy operation and maintenance, and can achieve automatic control during operation. It has high filtration efficiency, low resistance, large processing flow, and fewer backflushing times. Widely used in the pretreatment of water quality in pure water, food and beverage water, mineral water, electronics, printing and dyeing, papermaking, and chemical industries, as well as the filtration of industrial wastewater after secondary treatment. It is also used for deep filtration in reclaimed water reuse systems and swimming pool circulating water treatment systems. It also has a good removal effect on suspended solids in industrial wastewater.
3、 Working principle
The adsorption capacity of activated carbon is related to factors such as water temperature and quality. The higher the water temperature, the stronger the adsorption capacity of activated carbon; If the water temperature exceeds 300C, the adsorption capacity reaches its limit and there is a possibility of gradually decreasing. When the water quality is acidic, the adsorption capacity of activated carbon for anionic substances is relatively weakened; When the water quality is alkaline, the adsorption capacity of activated carbon for cationic substances weakens. So the unstable pH of water quality can also affect the adsorption capacity of activated carbon.
The adsorption principle of activated carbon is to form an equilibrium surface concentration on its particle surface, and then adsorb organic impurities into the activated carbon particles. The adsorption effect is very high in the early stage of use. But over time, the adsorption capacity of activated carbon will weaken to varying degrees, and the adsorption effect will also decrease accordingly. So activated carbon should be cleaned or replaced regularly. The large water content of activated carbon particles also affects their adsorption capacity. Generally speaking, the smaller the activated carbon particles, the larger the filtration area. Therefore, powdered activated carbon has a large total area and the best adsorption effect. Powdered activated carbon is prone to flow with water and is difficult to control, so it is rarely used. Granular activated carbon is difficult to flow due to its particle size, and impurities such as organic matter in water are not easily blocked in the activated carbon filter layer. It has strong adsorption capacity and is easy to carry and replace.


2、quartz sand filter


1、 Product Introduction:
Quartz sand filter is the earliest and most common type of deep treatment for clean and sewage in the field of environmental protection. Quartz sand filter is the most effective means of removing suspended solids in water, and is an important unit in sewage deep treatment, sewage reuse, and water treatment. Its function is to further remove pollutants that have already been flocculated in water. It achieves the purpose of water purification through the interception, sedimentation, and adsorption of filter materials.

2、 Product features:
The device has a simple structure, easy operation and maintenance, and can achieve automatic control during operation. It has high filtration efficiency, low resistance, large processing flow rate, and fewer backwash times. Widely used in the pretreatment of water quality in pure water, food and beverage water, mineral water, electronics, printing and dyeing, papermaking, and chemical industries, as well as the filtration of industrial wastewater after secondary treatment. It is also used for deep filtration in reclaimed water reuse systems and swimming pool circulating water treatment systems. It also has a good removal effect on suspended solids in industrial wastewater.
This type of equipment is a steel pressure filter that can remove suspended solids, mechanical impurities, residual chlorine, etc. from raw water. According to the different filter materials, mechanical filters are divided into single-layer, double-layer, three-layer filter materials, and fine sand filters; The filter material of quartz sand filter is generally single-layer quartz sand with a particle size of 0.8-1.2mm and a filter layer height of 1.0-1.2m. According to structure, it can be divided into single flow, double flow, vertical, and horizontal; According to the anti-corrosion requirements of the inner surface, it is divided into lined rubber type and non lined rubber type.



3、 Applicable conditions：
Quartz sand pressure filter is suitable for industrial, rural, urban areas that require filtered water turbidity ≤ 3 milligrams/liter
Water supply facilities such as residential areas. When using a double-layer filter material filter for direct filtration, the turbidity of the incoming water is often kept below 60 milligrams per liter, and coagulant should be added before filtration. When used for sedimentation filtration, the influent turbidity is ≤ 15 milligrams per liter. Single layer filter media is only suitable for filtering sediment water with inlet turbidity ≥ 15 mg/L.
Mechanical filters have a simple structure and easy operation, making them a commonly used filter and widely used in small boiler water treatment processes. When the suspended solids content in the raw water is less than 30-50mg/L, it can be used as a pretreatment equipment for ion exchange softening (or desalination) process. It can also be used for coarse filtration treatment of process water with low water quality requirements.


Filter parameter table