The ABW® (Automatic BackWash) filters are sand filters where each «compartment» is washed automatically (see section filtration) ; these filters are used in drinking or process water production and ... Filtration, Filters ... Filtration Filters ... abw filters ... Filters...

The Greenleaf filter uses an original wash and filtration regulation system. This gravity filter uses its filtered water output to wash itself and does not require any wash make-up water except when ... Filtration, Filters, Greenleaf ... Filtration Filters Greenleaf ... greenleaf filters ... Filters...

These filters have the particular property of using a filtering media that is less dense than water and this requires special technological options, especially regarding: general hydraulics ... Filtration, Filtrazur, Aquazur, Filters ... Filtration Filtrazur Aquazur Filters ... filtrazur filters ... Filters...

One or two fluids (usually filtered air and water, see section filtration) are always used in upflow mode to wash filters, except in special cases (filtering media that is lighter than water ... Filtration, Aquazur, Filtrazur, Filters, Mediazur, Seaclean ... Filtration Aquazur Filtrazur Filters Mediazur Seaclean ... filter washes ... Filters...

Some gravity filter batteries can operate with a variable flow rate, without individual control and without significant level changes (figure 23). Figure 23. Schematic diagram of a declining ... Filtration, Filters ... Filtration Filters ... declining rate filters ... Filters...

Most of the time, these filters are loaded with a single filtering layer of sand or of anthracite. The maximum head loss reached at the end of a cycle can vary from 0.2 to 2 bar, mainly depending ... Filtration, Filters ... Filtration Filters ... filters backwashed with water only ... Filters...

The operation of these filters is completely independent and automatic, in filtration and in wash modes. The water to be filtered comes from a header tank and, after filtration through a low ... Filtration, Filters ... Filtration Filters ... automatically washed filters without valves ... Filters...

These filters have one single, homogenous layer and are backwashed simultaneously by air and water. The filter bed is homogenous throughout its depth and supported on a metal floor ... Filtration, Filters ... Filtration Filters ... filters backwashed with air and water simultaneously ... Filters...

The quality of floor design and construction constitutes an essential factor in satisfactory filter operation; in effect, the floor must provide the following features : an even distribution ... Filtration, Filters ... Filtration Filters ... floors for concrete open gravity filters ... Filters...

These apparatus are filters with a lower return system and a large diameter flow, which is filled by several support layers of the filtering media itself. In the upper support layer ... Filtration, Filters ... Filtration Filters ... filters suitable for successive water and air washes ... Filters...

cycles Almost all granular material filters work in cycles that include a filtration period followed by a final wash. The essential parameter that restricts the duration of these cycles is head ... Filtration, Filters ... Filtration Filters ... Filters...

that have slots that are significantly narrower than the size of the material; or a support layer (gravel, garnet …) when the filter media and nozzle slots are not compatible. This 5 to 40 cm deep ... Filtration, Filters ... Filtration Filters ... Filters...

screens. The sludge drained and subsequently thickened is placed in the filter scoops of a laboratory centrifuge. The sludge is centrifuged at 2,000 g for 5-10-15 and 20 minutes. apparatus GDD screen ... GDD/GDE, Filters ... GDD/GDE Filters...

The FV2B vertical filter is fed with water, without turbulence, by the trough located above the filter media. Thus, the design is a downflow filtration. It supplies desalination plants under 10 ... Filtration, Desalination, GAC, Sand filtration, Filters ... Filtration Desalination GAC Sand filtration Filters ... to the depth of the filter media and the grain size Optimisation of construction costs : the FV2B filter design limits Civil Engineering involvement. ... vertical pressure filter - FV2B Filter ... Filters...

Aquazur filters are backwashed using the simultaneous «air and water» method: this involves a high air flow rate return and reduced water flow rate followed by a rinse at an average flow rate ... Filtration, Aquazur, Filters, Regulazur ... Filtration Aquazur Filters Regulazur ... aquazur sand filters ... Filters...

These filters have almost entirely disappeared. Only a few applications remain on carbonate removal sludge or gas scrubbing. In effect, these energy-hungry vacuum filters require sludge ... Filtration, Sludge treatment, Filters ... Filtration Sludge treatment Filters ... rotating drum vaccum filters...

description-performances Despite being more expensive, these filters are becoming used more frequently. On the outside, these filter presses look like conventional filters but one of the inner ... Filtration, Sludge treatment, Filters ... Filtration Sludge treatment Filters ... membrane plate filter press...

Ingenious devices have been developed to replace manual scraping during sludge cake removal. A careful choice of technique is necessary as sludge cake removal must be complete before the filter ... Filtration, Sludge treatment, Carbonate removal, Filters ... Filtration Sludge treatment Carbonate removal Filters ... automatic filter press...

The entire throughput to be filtered is evenly distributed at the filter inlet, where water fails from a variable height depending on the level of fouling. When the filter is clean, the sand ... Filtration, Aquazur, Filters ... Filtration Aquazur Filters ... constant rate, variable head filter ... Filters...

These filters have been designed for use with granular activated carbon ( GAC ); they can also be adapted for filtration using other lightweight materials (pumice, anthracite …). The Carbazur GH ... Filtration, Filters, Carbazur, GAC ... Filtration Filters Carbazur GAC ... carbazur activated carbon filters GH ... Filters...