Containerised Reverse Osmosis Plant

Hub 4 Water Containerised Reverse Osmosis units feature:

• ISO containers upgraded with sandwich panel insulation (air-conditioners)
• All stainless-steel frames and wetted parts
• Quality label components such as Lowara, Ebara Grundfos, Endress Hauser & Georg Fischer
• Local design & assembly to exceed Australia Standards
• Flexible optional extras while maintaining ease of service

We typically construct our containerised reverse osmosis plant with either 4.0” or 8.0” Filmtec or Hydranautics reverse osmosis membranes suitable for the application and we carry a full range of spares and consumables which can be delivered nationwide within days.

Our containerised plants are designed with maximum water efficiency and minimum waste in mind with recovery rates as high as 80-85% depending on the quality of the feed water. Excess salinity or silica amongst other things will limit the recovery rate of the system. An accurate estimation of the final Reverse Osmosis system water recovery can be provided after receiving your feed water analysis and upon completion of the system design.

The containerised plant will include all components of the pre-treatment, the RO unit and any optional post treatment components all plumbed, wired and tested within the container itself. This approach greatly reduces the cost of onsite installation as the system is ready to go upon arrival at site and only need be connected up to water and power. This also provides the added advantage of making it much easier to relocated, something that comes in handy when the system is to be used on multiple sequential projects.

Reverse Osmosis Plants

Reverse Osmosis works by using a high pressure pump to increase the pressure on the salt side of the RO and force the water across the semi-permeable RO membrane, leaving almost all (around 95% to 99%) of dissolved salts behind in the reject stream. The amount of pressure required depends on the salt concentration of the feed water. The more concentrated the feed water, the more pressure is required to overcome the osmotic pressure.

The desalinated water that is demineralized or deionized, is called permeate (or product) water. The water stream that carries the concentrated contaminants that did not pass through the RO membrane is called the reject (or concentrate)

One of the common water contaminants addressed by the pre-treatment stage is suspended solids. Fine particles of dirt and other matter floating in suspension within the feed water. These particles are not dissolved into the water and have to be physically removed via filtration.

Reverse Osmosis membranes, the core component of the RO plant are not designed to remove such suspended particles and will foul rapidly if left to do so. As such adequate filtration is required prior to any Reverse Osmosis System in order to achieve proper system operation and avoid premature fouling of the membranes.

Different sources of feed water will typically have different levels of suspended solids. Surface waters such as rivers and dams tend to have the highest levels, as they catch water running across the earth which is typically heavily laden with dirt and other solids. While bore water extracted from deep within the earth has much lower levels as the water has been filtered by the rocks through which it passes prior to collection. As such these two feed waters will typically require different pre-treatment technology. For example, it is considered best practice to operate an Ultrafiltration system prior to an RO plant for surface water, while bore water only requires the use of a media filter.

One of the first steps in designing a suitable skid mounted reverse osmosis plant therefore is collecting and analysing the proposed feed water. In doing so we will have a much better understanding of water to be purified. The information provided from the analysis can then be directly inputted into our design software, ensuring you get a robust, effective system that works first time with no surprises.

Hub 4 Water RO units are designed and built in Adelaide South Australia, we source the best possible components and control systems to ensure that our RO systems provide the highest levels of reliability.

Spares and consumables

• RO membranes
• Antiscalants
• CIP Cleaners
• Disinfectants
• Membrane analysis
• Pumps
• Chemical dosing equipment
• Servicing and maintenance
• Controls and Instrumentation
• Valves and piping/fittings