WATER SUPPLY TREATMENT WITH ION EXCHANGE METHOD

1. Disadvantages of current water treatment technology

Water treatment plants in Vietnam have a fairly simple water treatment process, mainly using traditional sedimentation and filtration technology (more: http://ngoenvironment.com/vn/Tin-tuc-n37-QUY-TRINH-XU-LY-NUOC-CAP-CHO-SINH-HOAT-PHO-BIEN-TAI-CAC-NHA-MAY-NUOC-d149.html) This technology has the advantage of low investment cost, basically treating of pollutants such as turbidity, low organic matter concentration (COD <5 mg / L), metals contained in water such as Fe, Mn, Mg, Ca, however this process also has many disadvantages:

• Using chemicals such as lime water, PAC, polymer or potassium permanganate (KMnO4) to treat pollutants, in case the chemical is used in excess or incorrect dosing, it will generate toxins in water supply or the treatment efficiency will be low.

• The management of water quality is performed by periodic testing (monthly, quarterly) by the authorities. Many water plants have not been equipped with automatic monitoring system, which always makes it difficult to control water quality. Moreover, the water quality depends much on the operational level and management capacity of each investor. This is an unreasonable point in the water quality management policy in Vietnam. According to Decree No.40/2019 / ND-CP, coming into effect from July 1, 2019, production facilities with discharge wastewater flow from 500 m3 / day to 1000 m3 / day must install automatic monitoring systems while there has not been a similar management regulation on the water supply plants with production capacity up to hundreds of thousands of cubic meters of water per day and night.

• Traditional technology is incapable of handling complex pollutants in water supply if the water source is polluted due to unsatisfactory discharge from industrial, agricultural or salinity. For example:

(i) Heavy metals (Arsenic)

(ii) Dissolved organic matter (COD component which is smaller than 0.4µm in size)

(iii) High hardness, ≥ 300 mg / L CaCO3. Raw water contains a lot of Cations, creating hardness in 3 main types: Ca2 +, Mg2 +, HCO-3, Cl-, SO2-4. If the water has a high hardness of over 120 mg / L CaCO3, there will be a lot of sediment when boiled.

(iv) Ammonium (NH4 +)

 (v) Nitrate (NO3-)

2. Treatment solution with Ion-exchange Resin method designed by NGO

The ion exchange treatment method is very efficient in removing ions in wastewater, including cationic ions that create water hardness, water-soluble COD components or toxic metal pollution in water. In the fine treatment methods including RO, Electrolysis, Electro De-Ionization, ion exchange, the use of ion-exchange resin materials has the advantage of lower investment costs and simpler operation.

WATER SOFTENING AND EFFICIENCY

AMONI TREATMENT AND EFFICIENCY

Ion exchange materials are also commonly used in complex wastewater treatment, mainly for the removal of heavy metals from the water.

CYANIDE TREATMENT AND EFFICIENCY

NICKEL TREATMENT AND EFFICIENCY

3. NGO provides all ion-exchange resin used for WATER SUPPLY, SUPER PURE WATER, WASTEWATER: 

• Cation Resin 
• Anion Resin
• Macroporous adsorption Resin
• Mixed bed polishing Resin

4. Why you should contact NGO when you have demand for ion exchange materials or water filtration system?

• There are many commercial units supplying ion exchange water filtration materials on the market, and there are thousands of different resins with different physical and chemical properties, different water characteristics will need different materials. However, you must assess how other components in the water source are likely to interfere with the treatment of material. Therefore, you need a unit with the capacity of experimenting, designing and know about materials like NGO to avoid ineffective investment.
• NGO directly cooperate with scientists and R&D departments in one of the largest resin factories in the world to choose the right materials for each problem that businesses face in their treatment of water supply, as well as wastewater in their factories.
• NGO supply materials to businesses directly from the Factory without going through any commercial intermediaries. With NGO, costs for businesses will always be optimized.

5. Ion exchange water filter tank and integrated water treatment system

If your business is interested in solution to inlet water treatment, or has a demand for ion exchange materials, please contact NGO via phone number (024) 3566 8225 or email office@8ngo.com for direct consultation.