SUEZ has developed technologies to produce fresh water from seawater. It offers original and efficient processes at every stage of the water’s treatment, with particular emphasis on preliminary...

in coastal areas. This is why desalination is proving to be an important solution. SUEZ’s water treatment specialists have developed technology to produce fresh water from seawater. They offer original...

Continuous and automatic treatment process regulation involves the use of analog measurements and of detection values that provides TOR (tout ou rien in French = all or nothing) data. It is very...

be termed coagulation chambers. In basic water treatment plant, processing relatively warm and easily flocculated water, injecting the reagent direct into a water fall may provide satisfactory results...

applications in drinking and industrial water treatment, desalination and re-use. The different types of membrane have already been discussed in the section Membrane separation, together with forecast...

with high level of recirculation, even zero liquid discharge systems, reintroducing these techniques into the water treatment range. In effect, the most soluble salts (e.g. NaCℓ, SO4Na2…) can only...

that is similar to that of the bacteria found in activated sludge and in trickling filters (see biomass used in wastewater purification.). Figure 1. Main morphological appearance of bacteria algae...

The term «reduced sludge production» applies to technologies used to reduce the amounts of sludge produced directly at source. Incorporated into the treatment chain, these processes operate...

of the salts present.For instance, the following residual levels may be obtained: 2 to 3 g · L–1 SO42– in brackish water treatment applications, using CaCℓ2, 1.5 to 2.5 g · L–1 SO42– when neutralising...

Chronologically, we have a number of different periods: end of the 19th century and 1st half of the 20th century: widespread application of the extensive biological treatment system or slow...

The choice of treatment will depend on the radionuclides present and in problems associated with the waste: sludge from clarifiers, filter materials etc. Coagulation-flocculation treatments...

in the recycling of wastewater (classic or twin-membrane systems, see section desalination membrane application). chemical washes Finally, regardless of the care taken with pre-treatment and with good plant...

and to using adsorption to fight against pollution; or even better, during the second stage of filtration for finishing only or for dechlorination. For some treatments where an enhanced biological action...

, can be found in chapter heat treatment used on dewatered sludge – general comments. ...

Ion exchange treatment is used for: Demineralised water production for industrial processes, whether for industrial product manufacturing processes or in steam generator supply...

treatment has shown that: the rate at which the substrate is depleted stabilises at a constant level once the biofilm thickness is such that oxygen becomes a limiting factor in the deepest layers...

and dispensers, stored in a cool place away from fuel compounds or fuels or sources of energy). Its use in the field of water treatment extends to: reducing hydrogen sulphide emissions in sewers; removing...

Tables 39 and 40 compare the reactivity of the main oxidising agents currently used in water treatment and the drawbacks directly induced. For each target, the effectiveness and side effects of each...

and, therefore, are not very much used in water treatment. On the contrary, in processes found in chemical, pharmaceutical and milk industries, where they are used to recover recyclable macromolecules...

– remineralisation) ; in industrial water: downstream cationic ion exchangers, in order to reduce conductivity and to avoid overloading anionic ion exchangers (see chapter Using ion exchangers) ; in wastewater...