Reverse Osmosis Systems

Reverse osmosis (RO) is an extremely effective and reliable water treatment technology used in various industries. It uses semi‑permeable membranes to remove the majority of dissolved solids, particles, bacteria, and other pollutants from feed water. RO can be used by itself or combined with softening/disinfection to produce water suitable for high‑purity applications.

The advantages of reverse osmosis are many, which make it a preferred method for many applications, from drinking water production to industrial processing. It offers high purification efficiency, broad applicability, improved taste and odor of water, low energy consumption, consistent performance, and cost effectiveness at large scale.

Design / Construction of Reverse Osmosis Equipment

At Advice, we are committed to delivering specialized, high‑quality solutions for producing potable, industrial, or ultrapure water. With over 40 years of experience in the industry, we specialize in supplying state‑of‑the‑art desalination equipment for seawater and brackish water. Our company is dedicated to providing innovative solutions that prioritize reliability.

We provide comprehensive and reliable solutions to our clients, including:

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We provide comprehensive and reliable solutions to our clients, including:

Design — Engineering

Every project has its own needs and requires careful water management. These critical factors must be taken into account when designing water treatment systems. Advice’s design team, made up of experienced engineers, can help you develop the most suitable and cost‑efficient solution, taking into account all parameters for a high‑specification project, with emphasis on quality, functionality, and ergonomic design.

Construction

Our construction phase uses materials from the world’s leading companies to ensure smooth and uninterrupted operation of the units. Advice Watertech holds the necessary ISO certifications to guarantee quality and safety in all construction works.

Energy Recovery Systems

Energy efficiency is a primary concern in RO unit construction. Energy recovery systems exploit the high pressure of the reject flow to drive the membrane system at the high pressure needed for the RO process, reducing energy costs by up to 60%.

Fully Automated Operation

The control panel is equipped with a PLC and connects all sensors, regulation devices, and control systems, allowing full control of the unit. It is specifically built for operating RO/filtration installations. Remote monitoring and remote control of the unit are possible.

Containerized Reverse Osmosis Systems

RO systems in shipping containers are compact, autonomous units housed in a transport container for easy mobility and installation. Our systems arrive quickly, fully assembled and hydraulically tested, allowing immediate deployment without extensive on‑site setup. Their design allows scalability and flexibility, ensuring that water treatment needs can be met in various locations and under different conditions.

After‑Sales Service

Technical Support

We provide specialized technical staff for prompt and effective maintenance and repair, nationwide. Regardless of the application, an RO system is a machine that requires a lot of attention and a well‑maintained pretreatment system to ensure effective, reliable operation. As feed water chemistry and operational demands change over time, having an experienced partner to monitor and adjust your desalination system is essential to save costs and avoid unnecessary downtime.

Supply of Materials and Spare Parts

Need spare parts for the RO unit you own? Advice offers an extensive range of equipment and spares, such as filters, membranes, pressure vessels, membrane housings, chemicals for RO operation, etc. You can check our product list by clicking here.

We take pride in our commitment to quality and technological excellence, making us a trusted partner in the field of water treatment. Explore our range of products and discover the ideal solution tailored to your unique needs.

Pretreatment

Pretreatment in an RO system is vital for protecting the membranes and ensuring the efficient and long‑term operation of the unit. At Advice, we pay special attention to pretreatment, aiming to remove contaminants and particles from the water before it enters the reverse osmosis system. For basic pretreatment methods, you can learn more by clicking here.

Primary Water Disinfection

At this stage, the raw water is chlorinated using sodium hypochlorite (NaClO) via a suitable dosing pump, to neutralize the microbial load (and oxidize iron, later removed during the process).

Preparation for Main Treatment

MBS (Sodium Bisulfite)

MBS (Sodium Bisulfite) The purpose of using MBS is firstly to remove residual chlorine from the water, which damages RO membranes, and secondly to prevent microbial growth. Use of MBS is safe but requires careful monitoring and control to ensure proper application. Excessive use can lead to high levels of sulfates in water, while insufficient dosage can allow chlorine to pass into the membrane.

Turbidity filter

The turbidity filter is used to retain suspended particles such as silt, sand, clay, organic matter, and microorganisms found in seawater or brackish water that cause turbidity and can affect water quality. It is designed for a low filtration rate of 15 m³/h/m², providing high-quality filtration performance.

Turbidity filters can be used either as standalone water filtration units or as a pretreatment stage before reverse osmosis systems. The cleaning of the filter vessel is performed via backwash (reverse flow rinsing).

Activated carbon filter

These filters are recommended for effective filtration and dechlorination of brackish water, retaining and removing organic substances in any installation. Activated carbon is a highly porous material with a large surface area and a strong adsorption capacity.

The filter is designed for low filtration rates, capable of providing high-quality filtration. Available in both manual and automatic operation modes.

Cartridge filters

Cartridge filters are devices used to filter liquids or gases, retaining particles, impurities, and other unwanted substances. They are commonly used for water filtration prior to entry into reverse osmosis membranes.

Cartridge filters are widely favored due to their ease of use, effectiveness, and versatility. Filtration ratings range from 1 micron up to 25 microns, depending on the specific requirements of the system.

Bag filters

Bag filters are a type of industrial filter used to remove particles and impurities from liquids or gases. They consist of a filter bag made from polypropylene, polyester, nylon, or other synthetic fibers.

Due to their high efficiency, large capacity, and ease of maintenance, bag filters are widely used across various industries.

Iron‑ and manganese‑removal filters

These filters remove iron and manganese naturally by using quartz and pyrolusite as the filtering media. They are the most effective method for eliminating these two elements, with pre-chlorination of the raw water being a key step in the process.

Antiscalant

An antiscalant is a chemical substance used to prevent the deposition of scale and other inorganic substances on surfaces such as pipes, heat exchangers, and reverse osmosis membranes. This ensures the smooth and efficient operation of water treatment systems.

Main Treatment

Reverse Osmosis

After pretreatment makes the water suitable for membrane passage without risk of damage, it is forced through the membrane assembly by a high‑pressure pump. As the water passes through the membrane array, the water pressure is greater than the osmotic pressure, causing salts and particles larger than about 0.1 nm to be retained by the membrane. The produced water is then directed to the final treatment stage.

Final Treatment

The final treatment stage may vary among different RO systems, depending on the quality of the raw water and the customer’s intended use for the final product water. For example, final treatment is essential in drinking water production, the food & beverage industry, the pharmaceutical sector, and other critical industrial processes.

Processes done during final treatment may include:

Mixing raw and produced water

The purpose of this system is the precise adjustment of the conductivity of the final water. Raw and produced water are mixed in a tightly controlled and monitored ratio, so that the desired final quality and conductivity are achieved.

Caustic soda dosing

The purpose of adding caustic soda is to adjust the pH of the produced water to the desired levels.

Dolomite filtration

The dolomite filter is used to increase the alkalinity of the produced water and enrich it with calcium. It is particularly used in areas where the water has low pH, in water remineralization systems, and to protect water distribution networks.

Disinfection of the product water

Disinfection is achieved by using sodium hypochlorite (NaClO) applied through an appropriate dosing pump to neutralize the microbial load.

Sterilization of the product water

Sterilization is achieved by the addition of an ultraviolet (U/V) light device after the reverse osmosis stage, which destroys the DNA of microorganisms, preventing their reproduction and the potential for contamination.

Are you looking for the right reverse osmosis water system for your home or business?

Advice Watertech undertakes the study and construction of fully customized desalination systems tailored to your specific requirements. To determine the most suitable system for your needs, don’t hesitate to contact our technical department.

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