Mechancial filter
Multi-media filter to make one or several filter media makes water of high turbidity flow through agranular or non-granular material of a certain thickness under a certain pressure, thereby effectively removing suspended impurities in the water and clarifying the water. The commonly used filter materials including quartz sand, anthracite and manganese sand, etc. they are mainly used for turbidity removal of water treatment, water softening and pretreatment of pure water in preceding stages and the outflow turbidity can be below 3 degrees. The filter is mainly used for reverse osmosis. electrodialysis, ion exchange as well as softening and demineralization system pretreatment and can also be used as coarse filtration of industry water supplying with undemanding water quality, circulating cooling water, reuse water treatment of wastewater and recycled water, etc.
Quartz sand filter
Quartz sand filter can effectively remove suspended solids in the water and has significant effects on the removal of colloids, iron, organics, pesticides, manganese, bacteria, viruses and other pollutants in the water. besides advantages of small filtration resistance. large specific surface area, strong acid and alkali resistance, resistance to oxidation, PH scope of 2-13 and anti-pollution. As a unique advantages of the quartz sand filter, the filter is able to run self-adaptively through the optimization of the filter media and filter design, so that the filter material has a strong adaptivity to raw water concentration, operating conditions, pre-disposal process. i.e. the filter bed automatically forms a non-uniform state during filtration, which helps to guarantee the water quality under a variety of operating conditions and spread the filter material when backwashing, achieving good cleaning effect. The sand filter has advantages including fast filtering speed, high filtration precision and large interception capacity, etc. The filter is used in the industrial water, domestic water and municipal water systems requiring outflow turbidity of not greater than 5mg/I and complying with drinking water quality standards and for the removal of suspended solid sand solids in industrial wastewater: it can be used as ion exchange and pretreatment for softening desalination system and can also be used in the coarse filtration of water with undemanding industrial water quality, swimming pool circular processing system and cooling circulating water purification system.
Activated carbon filter
Activated carbon filter is used for the removal of color, taste, residual chlorine and organics its main mode of action is adsorption. Activated carbon is an artificial sorbent. Activated carbon has developed pore structure and huge specific surface area, so it has a strong adsorption capacity for the dissolved organics in the water, such as benzene and phenolic compounds, and has better removal efficiency for organic pollutants which are hard to be removed by biological and chemical methods, such as chroma, stench, surfactants, synthetic detergents and dyes, etc. Granular activated carbon is able to remove 85% of Ag A , Cr2 + and Cr04 A 2 in the water Through the activated carbon filter bed, the suspended solid in the water is less than 0.1 mg/L, COD removal rate is generally 40% to 50% and free chlorine is less than 0.1mg/I. It can be used as pretreatment of ion exchange, electrodialysis and reverse osmosis in pure water technology so as to remove organics, colloids and residual chlorine; it can be also used as an advanced treatment mean after the secondary treatment to ensure the quality of reusewater.
Iron and manganese removal filter
Iron and manganese removal filter, filled with refined manganese sand and quartz sand, is used to remove iron and manganese in the water. It is applicable for the iron and manganese treatment of groundwater with iron content of less than 10mg/i and the maximum of no greater than 15 mg/I and pH value of no less than 5.5.After treatment, the iron content in the water is less than 0.3mg/I and the manganese content is less than 0.1mg/I, which are in line with national standards for drinking water Generally, it is only used in the pretreatment of raw water containing iron and manganese.
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