DAF (dissolved air flotation)
Dairies
Dalton (law)
Darcy (law)
Dead-end or tangential (membranes)
Deballasting
Dechlorination
Degasification membranes
Degasifying-stripping

• air strippers
• CO₂ removers
• degasification
• gas-liquid exchange
• packing degasifier
• strippers
• stripping (desorption)
• tank
• vacuum degasifier

Degrémont method: "Calcograph"
Demineralisation see also ion exchangers,

• demineralisation line
• designing a demineralisation system
• total
• very high speed (condensate)

DENSADEG (2D, 4D)
Desalination

• evaporator-crystalliser
• seawater evaporators
• using membranes

Desalination membranes (membranes and processes)

• balance based on a membrane
• biological fouling
• brackish water desalination
• chemical washes,
• choosing the specific output or flow
• competition between distillation/reverse osmosis
• desalination membrane application
• desalination unit design
• energy recovery
• fouling
• module layout
• multi-pass assembly
• nanofiltration
• removal of boron
• reverse osmosis,
• seawater desalination
• series assembly - discharge
• transfer mechanisms across membranes

Design of a desalination unit

• seawater evaporators
• using membranes

Designing a filter press
Designing a secondary settling tank
Designing biological processes
Designing a UWW system

• choice of technologies
• limitations
• typical examples

Desludging, desludgers
Desorption
Desulphurisation
Detergents
Determination of the pHS
Detoxification
Dew point (wet gases)

• in ozone production

Dewatering lagoons
Dialysis
Diatoms

• filtration through

Digester heating
Digester stirring
Digesters (of sludge - digestion)

• Cannon Mixer
• commissioning and operating a digestion system
• DIGECO
• digester: dimensioning - examples
• digester heating
• digester stirring

Digestion (of sludge)

• anaerobic digestion efficiency
• biogas re-use
• mesophilic (35-40 ºC)
• results and advantages of digestion
• thermophilic (50-60 ºC)
• two phases

Digestion gas
DIPAIR
Discharge standards