Antiscalants

Antiscalant / Antifoulant chemicals are a great way to prevent scale from forming and building up in water treatment systems. With the right protection, these chemicals not only improve efficiency but they can also make your equipment last longer. Check out the article below by ATS Water Technology to learn more about these products and get the most out of your water treatment process!

1. Benefits of antiscalant/ antifoulant for RO/NF membranes

RO/NF membranes in water treatment systems can get clogged up with scale/ fouling, which reduces efficiency and increases operating costs. Antiscalant/ antifoulant chemicals can help with this problem and provide great benefits, like improving efficiency and extending the system’s life. But what are these benefits? Let’s take a look at the functions of antiscalant / antifoulant in water treatment:

• Increase membrane life: Scale accumulation reduces the flow rate of permeate water and increases operating pressure, causing the membrane to deteriorate quickly. Antiscalant/ Antifoulant chemicals for the RO/NF system help reduce damage to the membrane surface and significantly extend the life of the membrane.
• Protect the entire system: Besides the membrane, scale/ fouling also causes damage and blockage of other parts such as pumps, valves, and pipes. Using an antiscalant agent protects the membrane and ensures that other components operate stably, minimizing repair and maintenance costs.
• Maintain filtration performance: Scale/ fouling reduces the system’s ability to remove impurities. Antiscalant/ Antifoulant in water treatment help maintain stable performance, ensuring the permeate water meets high-quality standards.
• Save operating costs: By keeping scale/ fouling under control and reducing the need for membrane cleaning, specialized antiscalant/ antifoulant chemicals can significantly reduce maintenance costs and minimize system downtime.
• Reduce energy consumption: The scale/ fouling layer on the membrane increases the system’s pressure difference (dP), requiring higher pressure to push water through the membrane, which can lead to increased energy consumption. Using effective antiscalant/ antifoulant chemicals helps prevent scale formation, maintain stable operating pressure, optimize water flow, and save energy for the system.

These benefits make it so that anti-scale chemicals for NF / RO membranes make the system more operational and extend the lifespan of the whole water treatment system.

Types of scale / fouling on the membranes

2. Types of antiscalant / antifoulant for RO/NF membranes

Choosing the right antiscalant / antifoulant chemicals for a RO/NF system requires understanding the various types of chemicals available. These chemicals are determined based on the properties of the scale/ fouling and the composition of the water being processed. Below is a list of common chemicals used to prevent scale/ fouling in RO/NF membrane systems.

2.1. Antiscalants

This product line is designed to deal with different scale types from inorganic salts and minerals, such as carbonate, sulfate, phosphate… These NF/RO antiscalants help control and prevent the formation of inorganic precipitates, maintaining membrane performance.

ATS Water Technology distributes PWT’s antiscalants, SpectraGuard™ and Titan ASD™. More details about the typical product models are in the table below.

Notes:

• ***: Excellent control
• ** : Average control
• *  : Moderate control

Products	Spectra Guard™ 100	Spectra Guard™ 250	Spectra Guard™ 311	Spectra Guard™ 350	Spectra Guard™ 360	Titan ASD™ 200
CaCO3	***	***	***	***	***	***
CaSO4	***	***	***	***	***	**
BaSO4	***	***	***	***	***	**
Fe/Mn	*	***	***	*	***	*
CaPO4	*	*	***	**	***	*
SiO2	***	*	***	***	***	**
Phosphate Free	✓					✓
NSF 60	✓	✓		✓	✓	✓
Kosher	✓		✓		✓
Halal	✓		✓
Datasheet

2.2. Antifoulants

Aside from scaling, fouling is another common problem with filtration systems. Specialized antifoulant chemicals help control organic compounds (BOD, COD, TOC…), silt, colloidal particles…

Check out the OrganoGuard™ product line – antifoulant chemicals that ATS Water Technology Co., Ltd. is distributing.

Criteria	OrganoGuard™ 100	OrganoGuard™ 111
Fouling control	Organic fouling (TSS, COD, BOD, TOC, colloidal particles, suspensions…).
Outstanding features	Phosphate-free formula, environmentally friendly. Stable operation in high pH, high temperature and high salinity environments. Meets NSF/ANSI 60 Standard.	11x Super Concentrated, reducing transportation costs. Phosphate-free formula, environmentally friendly. Stable operation in high pH, high temperature and high salinity environments. Meets NSF/ANSI 60 Standard.
Datasheet

2.3. Antifoulants for biofouling

PWT’s antifoulants for biofouling stop microorganisms from growing, forming biofilms, and fouling. This helps maintain stable filtration performance. This product is safe for the system and does not harm the environment, helping to optimize the water treatment process.

ATS Water Technology Co., Ltd. currently provides BioGuard™ environmentally safe antifoulants for biofouling; customers can refer to the product lines in the table below!

Criteria	BioGuard™ 100	BioGuard™ 111
Fouling control	Biofouling, including bacteria and microbial cells.
Outstanding features	Phosphate-free formula, environmentally friendly. Stable operation in high pH, high temperature and high salinity environments. Meets NSF/ANSI 60 Standard, Kosher, Halal.	11x Super Concentrated, reducing transportation costs. Phosphate-free formula, environmentally friendly. Stable operation in high pH, high temperature and high salinity environments. Meets NSF/ANSI 60 Standard.
Datasheet

3. Advantages of PWT specialized antiscalant/ antifoulant chemicals for membranes

PWT (USA) is always researching and developing new solutions for antiscalant/ antifoulant chemical production. Dendrimer technology is one of their most impressive technologies, a 3D polymer with a complex branched structure. It provides comprehensive anti-scaling ability for RO and NF filtration systems, optimizing the antiscalant/ antifoulant chemical formula for maximum effectiveness.

Some of the advantages of these product lines include:

• High performance: Prevents many types of scale such as carbonate, sulfate, silica, and colloidal particles… even when used in small amounts, helping to maintain stable system performance.
• Environmentally friendly: Some products are made without phosphate, which is better for the environment. This helps reduce the negative effects on the environment while meeting international standards for food, like NSF, Halal, Kosher…
• Outstanding performance in operation: Low viscosity, easy to dissolve, temperature stable, and resistant to harsh conditions, making it easy to add the product to many different systems.
• Convenient in storage and transportation: Dendrimer has the advantage of creating 11 times more concentrated products for convenient storage and transportation.

2D and 3D Dendrimer structure

4. ATS Water Technology – Distributor of PWT antiscalant/ antifoulant chemicals

ATS Water Technology Co., Ltd. is proud to be Vietnam’s official distributor among top antiscalant / antifoulant suppliers for PWT chemicals (USA). We provide high-quality anti-scale chemicals, using modern technology to help control the scale on the membranes of reverse osmosis and nano filtration systems.

ATS Water Technology offers more than just products. We also provide design, solutions, and water treatment technology consulting services, including projection modeling using specialized antiscalant software to calculate optimal dosing. Our team is dedicated to helping our customers find the perfect products, improve their operations, and get the best water treatment.

Our team of experienced engineers is always available, whether you need help with solutions, technology, water treatment techniques, or selecting equipment and systems. We’re here to ensure your satisfaction and ensure your project is successful and sustainable.

PWT chemicals are in stock at ATS Water Technology

If you have any questions or need advice about antiscalant/ antifoulant chemicals for RO plants, ATS Water Technology Co., Ltd. is here to help with competitive price options.

ATS WATER TECHNOLOGY CO., LTD

• Head office: 54/18 Bui Quang La, An Hoi Tay Ward, HCMC, Vietnam
• Branch office: 77 DHT10B, Dong Hung Thuan Ward, HCMC, Vietnam
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• Email: info@atswatertechnology.com
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5. Frequently asked questions about antiscalant/ antifoulant chemicals

What must you look for when picking antiscalant/ antifouling chemicals for your water treatment systems?

Systems don’t always use the same anti-scale chemicals. Picking the right chemical for the system depends on the type of water source, the nature of the input water, and the technical requirements of each system.

How to determine the dosage of anti-scale chemicals to use?

The amount you use depends on your water quality and how your system is set up. Usually, the manufacturer will give you specific instructions for each type of chemical.

Do antiscalant/ antifoulant chemicals affect the quality of the output water?

If you use the right amount, anti-scale chemicals won’t negatively affect the output water quality. In fact, they’ll help keep your water treatment system efficient.

Antiscalant/ antifoulant chemicals used in the water treatment process are essential for running a system that’s stable and sustainable. Choosing the right product can help reduce risks and save operating costs. Contact ATS Water Technology Co., Ltd. for more info about our product and pricing details!