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Frequently Asked Questions

Hydroflux HyPURE – Industrial Multimedia Filtration systems

What is the capacity range of the HyPURE Multimedia systems?
The HyPURE range is individually designed to suit customer requirements, the treatment capacity can range from <1m3/D up to and above 5000m3/D. Generally flows above this are more suited to gravity filtration. We have standard sizes that we manufacture, but due to the variability of the site conditions, feed water quality and available space in the plant each solution must be tailored to suit.

What are the typical sizes of the pressure filtration vessels.
Pressure filtration vessels are generally cylinders, mounted horizontally or vertically. Vertical vessels range from 300mm to 3m in diameter. Horizontal vessels are generally 2.2m in diameter to minimise shipping costs but can provide anywhere up to 10m2 in available filtration area by increasing the vessel length.

What type of maintenance is required on a HyPURE Multimedia system?
HyPURE MMFs are designed for extended maintenance free operating periods. Typically no maintenance is required for several years. The most frequent activity required is media replacement, which can be every 5 to 10 years for sand filtration down to 3 to 6 monthly for activated carbon filtration.

The HyPURE system has several advantages over conventional media filtration systems, as the use of bottom nozzle plates means that less downtime is needed for maintenance compared with bottom lateral diffuser designs. In addition, the HyPURE system uses independent control valves compared with a single multiport valve to control the filtration cycle.

Multiport valves are prone to breakdowns/failures and generally have a high replacement cost and long lead time. Individual parts for control valves and actuator heads are readily available and low cost to purchase. Operation of the HyPURE Multimedia plant can also be controlled remotely through the HyCONNECT® system.

Do Multimedia Filtration system require a lot of power?
Generally speaking, MMF systems require a lot less power than other types of filtration technology, such as ultrafiltration and reverse osmosis. The power is also influenced greatly by the feed TSS. The rate which the media bed differential pressure increases subsequently increases power required by the feed pump. The media bed also requires more frequent backwashing which impacts on the total energy consumption of the plant. Generally MMF systems operate at between 0.8 and 1.5 BarG.

How small are the particles which can be removed by the HyPURE Multimedia filtration
The purpose of the filtration bed is to capture fine colloidal material down to <2micron, which is 10x smaller than a human hair.

Can the HyPURE Multimedia filtration system handle iron, manganese and other heavy metals in the feed water?
MMF systems can handle dissolved heavy metals within the feed water, as long as the total concentration does not exceed the design feedwater levels of the filter. Hydroflux® offer a range of specialised media to maximise the metal precipitation and removal within the filter bed. This is done by catalysing the formation of metal oxides and metal hydroxides either infront of the MMF or within the filtration bed itself.

What is the purpose of an air scour in the bakcwash cycle of an MMF?
Air scouring of the filter bed is recommended to extend the bed life. During operation and backwashing, the media bed can form “rat-holes” or channels which allow pollutants to pass through unhindered. Air scouring the bed provides a mechanisms for more aggressive cleaning. Air soucring allows the media bed to be completely and evenly mixed within the vessel. The subsequent backwashing and settling of the media allows the bed to reform evenly, even when multiple grades of media are present in the one vessel.

How is the media replaced?
Media replacement can be done by several different means. Spent media is usually sucked out of the vessel via a vacuum truck and carted from site to be recycled or disposed. It is also possible to unload some low density media (such as activated carbon) via a hydraulic transfer to a specially designed screen to capture the media.
The most common method of loading the replacement media is directly filling from an elevated work platform or conveyor into the top of the vessel. Media can also be loaded in via large bulk bags, or pumped in from trucks or small tanks with specially designed loading systems. Hydroflux® hold media loading systems in our warehouse to assist customers with media replacement.

Hydroflux® also offer a wide range of media solutions. To find out more about the HyPURE range of media filtration please click on one of the below links:

How it Works
Applications