Membrane cleaners

Membrane cleaners for RO/NF/UF are essential solutions that effectively remove fouling deposits and restore membrane filtration performance. During operation, membranes become susceptible to fouling from inorganic scale, organic matter, microorganisms, and other contaminants. Using appropriate membrane cleaning chemicals helps maintain stable system operation, extends membrane life, and reduces operational costs. Continue reading this article from ATS Water Technology to gain a comprehensive understanding of this topic.

1. What are RO/NF/UF membrane cleaners?

In water treatment systems utilizing membrane technology—including reverse osmosis (RO) membranes, nanofiltration (NF), and ultrafiltration (UF) membranes—filtration membranes play a critical role in removing contaminants and ensuring output water quality. However, during operation, membrane performance degrades due to fouling and blockage.

To maintain stable operational efficiency, operators must perform regular cleaning using specialty chemicals. RO/NF/UF membrane cleaners are formulated products capable of removing fouling agents such as inorganic scale, organic matter, metals, biological deposits, and silica without damaging the membrane structure.

Membrane cleaners are specialty chemicals that effectively clean various types of fouling deposits without damaging the membrane

2. Functions of RO/NF/UF membrane cleaners

Specialized RO/NF/UF membrane cleaners play a crucial role in membrane system maintenance. These solutions not only restore operational performance but also extend service life and minimize damage risks to the entire system. When membranes become fouled, filtration efficiency decreases significantly, resulting in reduced flux, increased pressure, and decreased salt rejection rates.

Here are the primary functions of membrane cleaner products:

• Performance restoration: Cleaning fouling deposits allows membranes to operate like new
• Extended membrane life: Reduces membrane damage risks from differential pressure or corrosion
• Operational cost savings: Reduces energy consumption and membrane replacement frequency

Membrane cleaners effectively remove various types of fouling deposits on RO/NF/UF membranes

3. Types of membrane cleaning chemicals for RO/NF/UF

Each type of fouling requires a specific treatment approach. Therefore, membrane cleaners are categorized based on their chemical properties and cleaning objectives. ATS Water Technology provides detailed information below.

3.1. Acid membrane cleaners

This category of chemicals is specifically designed to remove inorganic fouling, particularly precipitated salts such as calcium carbonate (CaCO₃), calcium sulfate (CaSO₄), silica, and metal oxides/hydroxides including iron (Fe) and manganese (Mn).

Characteristics:

• Low pH, typically ranging from 1.5 to 4.0
• Safe for membranes when used at recommended dosages and contact times

Acidic membrane cleaner – OptiClean™ A+

3.2. Alkaline membrane cleaners

This type removes organic matter, biological deposits, biofilms, colloidal particles, and accumulated sludge. It proves particularly effective in breaking down protein bonds and polysaccharides while decomposing biofouling layers.

Characteristics:

• High pH, ranging from 9.5 to 12.5
• Helps prevent fouling reformation after cleaning

Alkaline membrane cleaner – OptiClean™ B+

4. Introduction to PWT specialty membrane cleaners

Regular membrane cleaning with specialty chemicals is essential for ensuring stable and durable operation of RO/NF/UF systems. Among available options, PWT membrane cleaners from the United States provide a reliable solution that effectively addresses common fouling problems in industrial systems.

4.1. About PWT RO/NF/UF membrane cleaners

PWT is a reputable US-based brand specializing in chemicals for industrial RO/NF/UF systems. The company’s membrane cleaning products feature proprietary formulations integrating multiple functions to optimize cleaning effectiveness while ensuring high safety standards for filtration membranes and water treatment systems.

Lavasol™:

• Liquid form
• Multi-functional chemical – removes acidic, alkaline, silica deposits, etc.

OptiClean™:

• Powder form
• Multi-functional chemical – removes acidic, alkaline, silica deposits, etc.

Biocides™:

• Liquid form
• Multi-functional chemical – controls fungi and algae

Membrane fibers after cleaning with PWT specialty chemicals

Below is a reference table for some of the most commonly used PWT RO/NF/UF membrane cleaners we distribute:

PRODUCT NAME	PH RANGE	FUNCTION	DATASHEET
OptiClean™ A	Low pH (2.50 – 3.50)	Removes metal hydroxides, carbonates, sulfates, calcium phosphate, and other similar scale deposits
OptiClean™ A+	Low pH (2.00 – 4.00)	Removes metal hydroxides, carbonate salts, sulfates, phosphates, and other similar scale deposits
OptiClean™ B	High pH (10.50 – 12.00)	Removes organic fouling (TOC, COD, BOD), biological deposits, sludge, colloids, and other insoluble fouling compounds
OptiClean™ B+	High pH (11.50 – 12.50)	Removes organic fouling (TOC, COD, BOD), microorganisms, sludge, particulates, and acid-insoluble deposits
OptiClean™ C	Neutral pH (6.00 – 7.00)	Removes organic fouling (TOC, COD, BOD), biological deposits, particulates, sludge, clay, and other acid-insoluble deposits
OptiClean™ D	Low pH (3.00 – 4.50)	Effectively removes iron and manganese deposits
OptiClean™ F	High pH (11.50 – 13.00)	Removes organic fouling (TOC, COD, BOD), microorganisms, particulates, and other acid-insoluble deposits
OptiClean™ G	High pH (9.80 – 11.00)	Removes organic fouling (TOC, COD, BOD), sludge, colloids, particulates, biological deposits, and other acid-insoluble contaminants
OptiClean™ H	Low pH (2.50 – 3.50)	Removes metal hydroxides, calcium carbonate, calcium phosphate, and other similar deposits from MF/UF modules and NF/RO membranes
OptiClean™ J	High pH (11.00 – 12.00)	Removes organic fouling (TOC, COD, BOD), sludge, clay, particulates, biological deposits, and other acid-insoluble contaminants
OptiClean™ K	Low pH (1.50 – 2.50)	Removes metal hydroxides such as iron and manganese, as well as calcium, magnesium, and other similar deposits from MF/UF/NF/RO membranes
OptiClean™ S	Low pH (3.00 – 4.50)	Removes silica and other basic fouling deposits
OptiClean™ N	High pH (8.50 – 9.50)	Removes organic fouling (TOC, COD, BOD), biological deposits, sludge, particulates, and other insoluble contaminants from thin-film composite membranes (RO and NF), UF, and MF systems
OptiClean™ X Eco	Low pH (2.50 – 4.00)	Removes metal hydroxides, carbonates, sulfates, calcium phosphate, and other similar scale deposits
OptiClean™ Y Eco	High pH (10.00 – 11.50)	Removes organic fouling (TOC, COD, BOD), biological deposits, sludge, particulates, and other acid-insoluble contaminants from thin-film composite membranes, ultrafiltration membranes, and microfiltration membranes
BioGuard™ Shock	Low pH (1.50 – 5.00)	Controls fungal and algae growth
BioGuard™ ISO	Low pH (2.00- 4.00)	Controls fungal and algae growth

4.2. Advantages of PWT RO/NF/UF membrane cleaners

PWT develops chemicals used for RO/NF/UF membrane cleaning based on practical research into fouling formation mechanisms, adjusting compositions to achieve optimal cleaning performance while maintaining equipment safety. Here are some advantages of this product line:

• Buffered pH capability enhances cleaning effectiveness: Unlike conventional chemicals that require pH adjustment throughout the cleaning process, PWT formulations help avoid pH shock that can damage membranes.
• Controls pH fluctuations beyond safe thresholds, providing excellent membrane protection: Cleaning with excessively high or low pH levels not only reduces membrane performance but can permanently damage the membrane structure
• Superior control of fouling reformation: Unlike conventional chemicals, PWT products contain dispersing agents that prevent redeposition
• Comprehensive fouling removal: Effectively cleans all membrane fouling types, including inorganic, organic, metallic, biological, and silica deposits
• Broad membrane compatibility: Suitable for various membrane types, including RO, NF, and UF systems
• International standards compliance: Most PWT membrane cleaner products carry NSF/ANSI 60 certification. Additionally, the OptiClean™ A+ and OptiClean™ B+ hold Kosher and Halal certifications

PWT’s RO/NF/UF membrane cleaners deliver superior effectiveness and meet numerous stringent international standards

5. PWT RO/NF/UF membrane cleaner pricing

Membrane cleaning chemical pricing depends on multiple factors, including product type, packaging specifications (powder or liquid form), purchase quantity, and accompanying technical services. Each system requires specific chemicals and dosages to achieve maximum effectiveness.

ATS Water Technology serves as Vietnam’s official PWT (USA) representative. We provide transparent pricing and expert consultation on selecting appropriate chemical types, ensuring both effectiveness and operational cost savings. Contact us today for PWT RO/NF/UF membrane cleaner pricing information.

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
• Consultation and support: (028) 6258 5368 – (028) 6291 9568
• Email: info@atswatertechnology.com
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Contact ATS Water Technology for detailed pricing and consultation

6. ATS Water Technology – Authorized RO/NF/UF membrane cleaner distributor

With extensive water treatment experience and a team of highly skilled engineers, ATS Water Technology Co., Ltd —the official PWT representative in Vietnam—provides more than just equipment and chemicals. We offer comprehensive design consultation, innovative solutions, advanced technology, and partnerships in maintaining and optimizing water treatment system performance.

Our specialized technical services include:

• System assessment and membrane performance analysis: ATS Water Technology conducts comprehensive RO/NF/UF system evaluations using actual operational indicators (pressure, flow rate, etc.) to determine fouling levels and current membrane filtration effectiveness
• Expert consultation on membrane cleaner selection: Based on water source characteristics and fouling types (organic, inorganic, microbial, silica, metals, etc.), our engineering team provides guidance on compatible membrane cleaners that ensure high cleaning effectiveness while protecting membrane lifespan

ATS Water Technology Co., Ltd. always prioritizes quality and practical effectiveness. We commit to providing genuine products with proper functionality and specialized technical services to deliver optimal treatment efficiency and long-term operational cost savings for customers.

Various types of membrane cleaners available in our warehouse

7. Frequently asked questions about RO/NF/UF membrane cleaners

How do I choose the right membrane cleaner for my water treatment system?

Chemical selection depends on membrane type (RO, NF, UF, etc.), input water characteristics, and fouling types encountered (organic, inorganic, biological). Accurate fouling identification can be achieved through water sample analysis, system performance evaluation, or membrane autopsy before selecting appropriate chemicals.

Should I invest in specialty membrane cleaners?

Absolutely. PWT’s specialty membrane cleaner products are specifically engineered to effectively clean membranes while meeting rigorous international standards.

What safety measures should I follow when using membrane cleaners?

To safely use RO/NF/UF membrane cleaners:

• Dissolve chemicals at correct dosages according to manufacturer guidelines
• Maintain pH within safe limits for your membrane type
• Never mix chemicals with opposing pH levels without explicit manufacturer guidance
• Ensure proper system circulation with appropriate temperature and contact time control

When is membrane cleaning required?

Several indicators suggest that filtration membranes require cleaning: product flow rate decreases 10-15%, salt rejection rate decreases 10-15%, differential pressure increases 10-15%, before extended system shutdown, or during scheduled maintenance intervals.

Therefore, using specialty RO/NF/UF membrane cleaners represents a critical factor in determining operational performance and system longevity. ATS Water Technology provides genuine PWT (USA) products with proven real-world effectiveness. Contact us today for specialized technical consultation and detailed pricing information.