Water Treatment Flashcards
If treatment involves physical force what is that called
unit operation
How are substances removed from water
By way of physical chemical or biological means
If treatment is used in regaurd to biological or chemical means what is it called
unit process
What are some of the unit operations
Screening, mixing, aeration, sedimentation, filtration, Ultra violet
What are the unit process for chemical
Coagulation, oxidation,disinfection, precipition
What is nitrification
converting ammonia to nitrate aerobically
What is dentrification
Reduction of oxidized nitrogen under anoxic conditions
what are some common water quaity issues
high sulfur, high chloride, high minerial
what are the two main types of surface water treatment
Convential- high urbidity, high color, high organic carbon Membrane filtration- Low all the other stuff
what are some main coagulants
Aluminum and iron salts
how does alum cause coagulation
by absorption and charge neutralization
what is sedimentation
separation of suspended solids from liquid by way of gravity
