U tube (ozonation contactor)
UCD
UEP (French): pesticide removal unit
UFD
Ultra pure water (UPW)

• EDI (electro-deionisation)
• make-up water treatment
• polishing and distribution loop
• pre-treatment
• reverse osmosis
• specifications
• treatment line
• UPW for the pharmaceutical industry

Ultra pure water treatment
Ultrafiltration (UF)
ULTRAFOR
ULTRAPULSATOR (or PULSATOR U)
Ultrasonics
ULTRASOURCE
ULTRAZUR (300-450)
Uniformity coefficient (UC)
Units of measurement

• Anglo-Saxon units
• international system
• other units

Uranium
Urban waste water

• collection method (sewers)
• dry weather water
• night soil
• rainfall water
• treatment
• wastewater typology

Urban wastewater treatment plants (UWWTP) processing urban effluent

• choice of processes
• compactness
• control-regulation
• examples of typical lines
• helminth eggs
• impact of sludge intended use
• performances of the different lines
• plant environment
• refurbishment
• sludge end us
• sustainable development
• system design: limitations
• UWW disinfection