Pure Aqua (CUSTOM PURIFICATION ) 2020-12-04T10:49:03+01:00

Custom Purification


pure aqua custom purification - containerized equipment - cro

Containerized / Mobile Reverse Osmosis Systems CRO

Imagine the strength and purification power of a large-scale reverse osmosis plant. That power can now be at the fingertips of anyone anywhere in the world, and requiring only the space of a forty-foot container. A Pure Aqua CRO Series Containerized Reverse Osmosis System is a self-contained, turnkey system that can function on-the-go or as a permanent water treatment plant, able to start pumping high-quality product in less than a day after arrival on-site. Our containerized reverse osmosis systems are made to order, meaning your system will be specifically tailored to your water treatment requirements, containing all the amenities your reverse osmosis system could possibly need.

Containerized reverse osmosis systems are the future in membrane water treatment. Capable of producing up to one million gallons of water per day from a single forty foot container, with built-in pretreatment and membrane cleaning, containerized systems are redefining the standards of water treatment plants worldwide.

Take the advantages of an industrial reverse osmosis system – high rejection of metals, minerals, and chemical contaminants, a high recovery rate, and sturdy built-to-last design – and make it portable, able to be transported anywhere in the world where potable water may be necessary. All these features can be yours in addition to a collection of benefits unique to containerized systems.

Each of our CRO series containerized reverse osmosis systems starts with a water need – your need, and goes from there. At Pure Aqua, we work directly with our clients from the ground up, keeping them involved with the construction and design of their containerized system every step of the way. The end product they recieve is a completely unique system tailored to their needs and specifications. Some of the special features that can be installed in a containerized system include insulation and centralized heating and cooling, keeping your industrial reverse osmosis system safe from even the harshest elements. A water purification plant can be available anywhere you can ship a twenty or forty-foot container.

Call Pure Aqua Inc. today to see how a CRO series containerized reverse osmosis system can revolutionize the way you provide potable water.

Container Size                              Standard ContainerInsulated Container
10ft       20ft     40ft     20ft40ft
Length (m)2.9612.2612.2
Width (m)
Height (m)
Lenght (m)2.85.8125.511.5
Width (m)
Height (m)
Cubic Capacity (m3)1633672867
Tare weight (kg)14502170331029504250
Max Gross Weight (tons)2024303034
Access1 double-door

Containerized water treatment plants have many advantages over built-in plant room installations and have a plethora of special options available:

  • Plug and play unit
  • Mobile: useful for construction sites
  • Small foot print
  • Centralized atmospheric controls available
  • Training and servicing guidelines included
  • Easy transportation
  • Limited civil work (only container foundation)
  • Reinforced diamond-plate flooring available
  • Self-contained pre-treatment and cleaning available
  • Quick installation
  • Turnkey delivery: piping, cables, air conditioning
  • Insulation and weather protection available
  • Overall less expensive than a permanent structure

The ideal applications for a Containerized RO system include primarily include temporary installations or water supplies, labor camps (mining installations, construction, etc.), military water supplies, and disaster relief, but can also serve in almost any situation where a reverse osmosis plant is used:

  • Power and Energy
  • Groundwater Remediation
  • Food & Drinking Water
  • Desalination
  • Mining
  • Water Recycling & Reuse
  • Treated Sewage Effluent
  • Off-Shore Applications
  • Island Applications
  • Fossil Water
  • Environmental Conservation
  • Dust Suppression
  • Boiler and Feed (Ultrapure) Water
  • Brackish Water
  • Armed Services
  • Aquifer Recharging 

Containerized / Mobile Water Treatment Systems CWT

The containerized media filtration system is one of the best methods of purifying surface water on the market. With rates up to 520 GPM, potable drinking water can be made for construction sites, temporary military camps, and industrial use with ease. We’ve taken all the benefits of an industrial media filtration system and made them portable, so they can be moved when to a new location when necessary or become a permanent installation. All of our containerized systems are designed from the ground up with your needs and specifications in mind, so you can be sure you are getting a unique, high-quality treatment system.

Dechlorination is a major advantage of multimedia filtration. Chlorinating water is a cost-effective way to disinfect it, but it leaves the water undrinkable, even toxic in high enough concentrations. Media filtration can take chlorinated water and purify it, not only eliminating chlorine, but depending on the types of media used, can eliminate colors, odors, tastes, suspended matter, silica, heavy metals, and acid content. Industrial media filtration can go with you wherever your needs may be when you use a CWT series containerized media filtration system from Pure Aqua.

Not only that, but there are a number of unique benefits to containerized systems that aren’t available to an in-room plant. Aside from the advantages that come from the portability of building a plant out of a forty foot container, containerized systems are entirely self-contained. Any pretreatment or multi-stage systems always go where your media filters go. A containerized media filtration system can even be designed with multiple tanks, allowing one to backwash while the others continue to provide high-quality product. The possibilities are endless.

Call Pure Aqua today for a quote, and we’ll be happy to provide answers for any questions you might have.

Plug and play

Pure Aqua’s containerized water treatment plants are designed to be plug and play. The equipment is equipped, attached, reinforced and tested in our industrial factory. Transportation is made to be simple with our employees only needing to connect a single inlet and outlet pipe to a power supply at the treatment site. This process creates a very quick solution and low impact on other operations.

Plenty of design options

Mobile water treatment systems are accessible in numerous sizes are available in various sizes such as 10, 20, 40 ft. in a standard or insulated container. The container comes complete with a centralized external connections, climate control system, interconnecting piping and wiring, safety equipment and a full 3D/2D CAD drawings. 

Fresh containers with several options

All containers are fresh and can be shipped in compliance with different quality requirements. The container can often be painted in your business’s colors for a stylish finish. In addition, there are several possibilities, from installing air-conditioning units to connecting multiple units to a larger system.

Building design customized

Pure Aqua is pleased to guide you on the latest technologies for water treatment and its incorporation inside containers(s). We encourage users to identify the unique specifications of your application so our team can create a suitable design.

Extensive experience and low Total Cost of Ownership

By incorporating our expertise of supplying water treatment systems, we understand how to construct, install and run with an emphasis on quality, performance and minimal maintenance. In the end we give the lowest overall ownership costs possible. Our experience is built on 20 years of experience and more than nine thousand water purification systems developed and designed by us. After all, containerized treatment is much more than simply jamming a system into a container.

Container Size                               Standard ContainerInsulated Container
10ft         20ft      40ft        20ft40ft
Lenght m2.9612.2612.2
Width m2.
Height m2.
Lenght m2.85.8125.511.5
Width m2.
Height m2.
Cubic capacity m31633672867
Tare weight kg14502170331029504250
Max Gross weight Tons2024303034
Access1 double-door

Containerized water treatment plants have many advantages over built-in plant room installations:

  • Plug and play unit

  • Mobile: useful for construction sites

  • Small foot print

  • Easy transportation

  • Limited civil work (only container foundation)

  • Quick installation

  • Turnkey delivery: piping, cables, air conditioning

The ideal applications for a CWT series Containerized Media Filtration System include industrial mining applications, military base camps, disaster relief, groundwater remediation, and construction facilities, all of which can either be permanent or mobile solutions.

Containerized / Mobile Ultrafiltration Systems CUF

Latest advancements in technology have produced the CUF Series Containerized Ultrafiltration System, capable of producing about one half of a million gallons of water a day from varying turbidities of water without needing to change membranes. A containerized ultrafiltration system is entirely self-contained, and goes wherever you need it to. It combines the benefits of a containerized system with the benefits of a skid-mounted industrial ultrafiltration system.

Ultrafiltration systems can produce large volumes of consistently high-grade water from varying qualities of intake without needing to change membranes. This technology has become portable with the Containerized Ultrafiltration System. Fitting an industrial ultrafiltration system in a ten foot storage container allows you to transport it literally anywhere. It can be shipped from site to site, driven short distances in the back of a truck, or remain in place as a permanent installation. Each containerized system designed by Pure Aqua is tailor-made to the client’s specific water treatment needs, ensuring that you get precisely what you are looking for from your containerized ultrafiltration system.

One of the most rapidly growing uses for ultrafiltration is in greywater treatment for agriculture or aquifer recharging. A containerized ultrafiltration module can fit almost anywhere, even in a pre-existing greywater plant, increasing output by almost a half million gallons of water a day. For more information, call Pure Aqua today and we’ll be happy to assist you or provide you with a quote on your very own containerized ultrafiltration system.

Container Size                            Standard ContainerInsulated Container
10ft         20ft       40ft       20ft40ft
Lenght m2.9612.2612.2
Width m2.
Height m2.
Lenght m2.85.8125.511.5
Width m2.
Height m2.
Cubic capacity m31633672867
Tare weight kg14502170331029504250
Max Gross weight Tons2024303034
Access1 double-door

Containerized water treatment plants have many advantages over built-in plant room installations:

  • Plug and play unit
  • Mobile: useful for construction sites
  • Small foot print
  • Easy transportation
  • Limited civil work (only container foundation)
  • Quick installation
  • Turnkey delivery: piping, cables, air conditioning

Some of the ideal applications for a containerized water treatment system include greywater treatment, groundwater remediation, and the irrigation industry.


Containerized Membrane BioReactor Wastewater Treatment System (MBR-C)

MBR-C Process Description

MBR-C is a containerized MBR which utilizes hollow fiber (HF) ultrafiltration (UF) membranes with nominal pore size of 0.04 µm. In a typical MBR-C system, feed water passes through a drum screen to mitigate suspended solids and protect membranes’ surface. Water is then transferred to a bioreactor where microorganisms decompose organic content to mineral constituents of CO2, H2O, and inorganic nitrogen products at ambient temperature. Thereafter, water overflows to membrane tank(s), where UF membranes achieve complete retention of bacterial flocs, suspended solids, small colloids, and viruses.

Submerged HF Membrane Technology

MBR-C utilizes submerged membrane module (SMM) products featuring the best-in-class thermally induced phase separation (TIPS) polyvinylidene difluoride (PVDF), innovative modules, and skid designs to provide the most compact, simple, and reliable solution. SMM products are typically implemented in MBR applications treating municipal and industrial wastewaters. They are designed to effectively meet the needs of customers designing a new facility or replacing existing skids of any other manufacturer. 

Containerized Membrane Bioreactor (MBR-C) Process Flow Diagram

membrane bioreactor wastewater treatment system mbr process flow diagram


Advantages of MBR-C

MBR-C provides numerous advantages over all known biological treatment processes presently in use:

  • TIPS spinning method → high tensile strength and long lifetime
  • PVDF membrane material → higher chlorine tolerance compared to other membrane materials (e.g., PES)
  • High packing density → fewer skids, smaller footprint, and higher productivity
  • Patented air scouring technologies → low energy consumption
  • Extreme caustic and oxidant tolerance → suitable for challenging applications
  • Dense crystalline and monolithic structure → direct integrity testing capability
  • Integration of bio-treatment and membrane filtration eliminates the need for sedimentation tank and allows for compact design and installation.
  • Minimal pumping requirements reduces equipment and operational costs.
  • Lower sludge production rate, due to higher sludge age (i.e., SRT), compared to conventional activated sludge processes results in savings on disposal expenses.
  • High mixed liquor suspended solids (MLSS) concentration and volumetric loading rate translate into compact footprint.
  • Membranes are capable of retaining activated sludge at high MLSS concentrations, leading to more effective BOD and nitrogen removal.
  • UF membranes are capable of removing small colloids and viruses in addition to suspended solids and bacterial flocs.
  • MBR-C can operate largely unattended with the exception of occasional routine performance checks and maintenance of mechanical components.
  • Segregated bioreactor and membrane tanks will allow for easy operation and maintenance.

Typical performance for sewage wastewater applications


Feed Water Quality

Expected Permeate Quality


6.5-7.5 S.U.

6.5-7.5 S.U.

Alkalinity (as CaCO3)

125 mg/L

≥100 mg/L

Temperature Range





<5 mg/L

Biochemical Oxygen Demand (BOD)


< 10 mg/L

Chemical Oxygen Demand (COD)


<50 mg/L

Ammonium-Nitrogen (NH4)


<2 mg/L

Module #                          

Flow Rate

Approximate Population (50 gpd per Capita)     


    Skid Material

       # of Containers



# of Skids    

# of Modules








 1 × 20′








1 × 40′








1 × 40′








1 × 40′

Standard Features

Operating conditions

Available Options

  • 40’ and 20’ high cube (HC) containers depending on capacity
  • Insulated container walls
  • Zero water leakage
  • Enhanced container structure
  • Seaworthy container
  • Pre-treatment using drum screen (1.5 mm perforation)
  • Aeration tank with fine bubble diffusers for biomass growth
  • Submerged HF membrane modules equipped with coarse bubble diffusers
  • Built-in membrane cleaning and air scoring system
  • Electrical supply: 460V/3Ph/60Hz
  • Operating temperature range: 68-86°F (20-30°C)
  • Design temperature: 68°F (20°C)
  • Anoxic zone to achieve denitrification (NO3 removal)
  • Additional pre and/or post-treatment processes to meet effluent quality requirements
  • Standby pumps for redundancy
  • Remote monitoring
  • Feed water pump
  • Municipal wastewater Treatment
  • Residential and commercial wastewater treatment (e.g., camps, hospitals, office complexes, golf courses, restaurants, and car washes)
  • Water reclamation (e.g., irrigation of gardens or agricultural fields)
  • Pre-treatment for Reverse Osmosis (RO) system
  • Industrial wastewater treatment
pure aqua custom purification - water treatment plant

Water Treatment Plant

Pure Aqua custom engineers complete integrated water treatments plants from raw water intake to product water distribution and building specifications.

Included in a Budgetary Quote:

  • Process and Instrumentation Diagram (P&ID)
  • General Footprint
  • Engineering documentation

Pure Aqua’s scope of supply is defined by battery limits, plants consist of modular water treatment skids equipped with their necessary components. These skid-mounted systems allow for easy installation and maintenance.

Pure Aqua’s water treatment plants have helped countries around the world provide fresh and potable water to its general population. Our products continue to help supply an increasing amount of potable water to poor societies around the world, and seemingly endless amounts of fresh water to first-world societies.

If you would like to understand the processing of how we take dirty water from sources such as rivers, lakes, wells, and convert them into safe drinking water then please click the link on top to watch some of our youtube videos, or check out our website’s resource section. Here, you will learn about the process of our water purification systems which involves chemical, filters, and other implementations that remove bacteria, viruses and other harmful contaminants from any given water source.

Water treatment plants have many advantages over built-in plant room installations:

  • Plug and play unit
  • Mobile: useful for construction sites
  • Small foot print
  • Easy transportation
  • Limited civil work (only container foundation)
  • Quick installation
  • Turnkey delivery: piping, cables, air conditioning
  • General Arrangement 3D drawings of all systems
  • General Layout 3D drawings of plant with interconnecting piping
  • Plant and system layouts in 2D CAD
  • Electrical drawings
  • Building specifications and loads
  • Commissioning
  • Personnel Training
  • Technical handbooks
  • Installation / Operation / Maintenance manuals

Applications include brackish and surface water treatment and seawater desalination for industrial or drinking water uses.


Reverse Osmosis Pre-treatment Unit

Reverse osmosis (RO) is a filtration method that removes many types of large molecules and ions from solutions by applying pressure to the solution when it is on one side of a selective membrane. The result is that the solute is retained on the pressurized side of the membrane and the pure solvent is allowed to pass to the other side. To be “selective,” this membrane should not allow large molecules or ions through the pores (holes), but should allow smaller components of the solution (such as the solvent) to pass freely.

That being said, it is vital to the preservation of the quality of your reverse osmosis membrane to pre-treat any materials that could harm reduce the effectiveness of the membrane itself. These materials may simply cause damage over time, or some may destroy a membrane outright.

Reverse Osmosis

Reverse Osmosis is most commonly known for its use in drinking water purification from seawater, removing the salt and other substances from the water molecules. This is the reverse of the normal osmosis process, in which the solvent naturally moves from an area of low solute concentration, through a membrane, to an area of high solute concentration. The movement of a pure solvent to equalize solute concentrations on each side of a membrane generates a pressure and this is the “osmotic pressure.” Applying an external pressure to reverse the natural flow of pure solvent, thus, is reverse osmosis.

The process is similar to membrane filtration. However, there are key differences between reverse osmosis and filtration. The predominant removal mechanism in membrane filtration is straining, or size exclusion, so the process can theoretically achieve perfect exclusion of particles regardless of operational parameters such as influent pressure and concentration. Reverse osmosis, however involves a diffusive mechanism so that separation efficiency is dependent on solute concentration, pressure and water flux rate.


Pretreatment is important when working with RO and nanofiltration (NF) membranes due to the nature of their spiral wound design. The material is engineered in such a fashion as to allow only one-way flow through the system. As such, the spiral wound design does not allow for back pulsing with water or air agitation to scour its surface and remove solids. Since accumulated material cannot be removed from the membrane surface systems, they are highly susceptible to fouling (loss of production capacity). Therefore, pretreatment is a necessity for any RO or NF system.

Pretreatment in SWRO systems has four major components:

  • Screening of solids: Solids within the water must be removed and the water treated to prevent fouling of the membranes by fine particle or biological growth, and reduce the risk of damage to high-pressure pump components.
  • Cartridge filtration: Generally, string-wound polypropylene filters are used to remove particles between 3 – 5 microns.
  • Dosing: Oxidizing biocides, such as chlorine, are added to kill bacteria, followed by bisulfite dosing to deactivate the chlorine, which can destroy a thin-film composite membrane. There are also biofouling inhibitors, which do not kill bacteria, but simply prevent them from growing slime on the membrane surface.
  • Prefiltration pH adjustment: If the pH, hardness and the alkalinity in the feedwater result in a scaling tendency when they are concentrated in the reject stream, acid is dosed to maintain carbonates in their soluble carbonic acid form.

CO3-2 + H3O+ = HCO3– + H2O
HCO3– + H3O+ = H2CO3 + H2O

  • Carbonic acid cannot combine with calcium to form calcium carbonate scale. Calcium carbonate scaling tendency is estimated using the Langelier saturation index. Adding too much sulfuric acid to control carbonate scales may result in calcium sulfate, barium sulfate or strontium sulfate scale formation on the RO membrane.
  • Prefiltration antiscalants:Scale inhibitors (also known as antiscalants) prevent formation of all scales compared to acid, which can only prevent formation of calcium carbonate and calcium phosphate scales. In addition to inhibiting carbonate and phosphate scales, antiscalants inhibit sulfate and fluoride scales, disperse colloids and metal oxides, and specialty products can be to inhibit silica formation.
Pure Aqua offers a wide range of pre treatment such as:
  • Multi Media Filters
  • Ozonation Systems
  • Chemical dosing Systems
  • Pre UV Sterilizers
  • Automatic Water Softeners
  • Degasifiers
  • Activated Carbon Filters
  • Ultrafiltration
  • Iron Removal Filters
  • Drinking Water Treatment
  • High Purity Water
  • Industrial Process Water 
  • Water Recycle and Reuse

Forced Draft Degasifiers

Pure Aqua Forced Draft Degasifiers are used to remove unwanted gases from supply water. The degasifier removes the gases by passing the water over a packing media that helps the water form a thin film over the surface area of the tower. A counter current airflow is introduced at the bottom of the tower and travels up the stack through the descending flow of water. The gases are stripped as the air passes over the surface area of the water.

Pure Aqua has a complete line of Forced Draft Degasifiers available. The systems start at 75 gpm and go up to 1000 gpm.


Degasifiers are used in demineralizer applications to strip CO2 following a strong acid cation exchanger or softening application. They can also be used as an economical way to strip hydrogen sulfide or volatile organic compounds (VOC). Degasifiers are sized based on water service flow rate.

Operation of the System

The forced aeration of water will obtain oxidized matter from the fluid and remove gases such as methane (CH4), carbon dioxide (CO2), and hydrogen sulfide (H2S). The total removal of the gases requires previous acidifying of the fluid and the use of strong oxidizing agents such as chlorine or potassium permanganate. The raw water falls from the top of the tower onto a layer of filling elements of special shapes. This is required in order to maximize the surface area with the forced upward draft. This results in the most thorough oxidation and removal of gases carried up through the tower and collected at the top.

Model #Tower
Max Flow
Air Flow
Blower HPInlet/ Outlet.Clearwell
Size (Gal)
Media (ft3)
FDD-75            24”                    75                         350                   1-4                        2” / 4″                       300                     20
FDD-14036”1407001-33” / 6″60050
FDD-25048”25012501-24” / 8″100090
FDD-39060”39020003-46” / 10″1500140
FDD-55072”550280016” / 10″2200200
FDD-100096”1000500028” / 12″4000270

Standard Features:

Available Options:

  • Corrosion resistant, high quality material      
  • Centrifugal fan
  • Clearwell (FDD75-250)
  • Overflow connection
  • Inlet valve and plumbing to tower
  • Tower assembly and internals
  • Clearwell access ports
  • Clearwell level switch
  • Float operated ball valve
  • Power supply: 460V/3pH/60Hz
  • Standby fan unit
  • Fixing lugs
  • Insulated/heated clearwell
  • Clearwell (FDD390-1000)
  • Tropical conditioned motor
  • Flame proof motor
  • Power supply: 220V/3pH/50Hz
  • Fan intake air filters
  • Custom designed units
  • H2S removal
  • Post treatment for RO systems
  • Post treatment for MBDI