quiz3(mod3) Flashcards
process of improving the quality of water for its intended use
water treatment
specific contaminants that are removed by water treatment
physical, chemical, biological and radiological
method of water treatment
by allowing time and inactivity of water for heavier particles to settle on the bottom of the
sedimentation
method of water treatment
additon of chemical alum or hydrated aluminum sulfate to remove suspended matters and some coloration
coagulation
method of water treatment
surface of water is exposed to air as much as possible which improves the taste and color of water and decrease its corrosiveness
aeration/oxidation
powerful oxidizing and disinfecting method to destroy bacteria which passes dry air or pure oxygen to a system where 80% of the energy is converted into heat
ozonation
method of water treatment which is the common means of water treatment
filtration
method of water treatment under filtration
generaslly used for rainwater applicatiom, easy to be constructed and low maintenance
slow sand filtration
method of water treatment under filtration that uses pressure to force water out of a containment such as tank. It uses sand as a filtering agent and commonly used in swimming pool applications
pressure sand filtration
method of water treatment under filtration which uses _ obtained from which is a siliceous sedimentary rock and produces an end product of clean and dirt-free water
diatomaceous earth filter
diatomite
method of water treatment under filtration that is composed of permeable porcelain and unglazed tube called
pasteur filters
bisque
method of water treatment under filtration that is a combined process of removing iron and manganese
fine filtration by chlorination
method of water treatment under filtration that uses which attracts large quantities of gas. It works through a process called _ where contaminant is trapped inside the pore molecule. commonly used in domestic water purification which can remove undesirable taste and color
activated carbon filters
adsorption
method of water treatment under filtration, which is widely used to remove dissolved, suspended and even biological contaminants
reverse osmosis
method of water treatment that is the most important health related water treatment
disinfection
the most widely used disinfectant
chlorine
compounds result from the reaction of ammonia and chlorine in a water solution. less strong and have less bacteeria killing ability
chloramine
stronger disinfecting ability then chloramine
chlorine dioxide
common relative to chlorine that is used for disinfecting water of unknown quality
iodine
method of water treatment that heats water to allow condensation, the resulting water may be flat in taste but can also kill basteria and viruses and removes iron and lead
distillation
method of water treatment that is advantageous to children to drink this because they will have less rate on tooth decay. _ is toxic that can mottle up teeth
fluoridation
defined as the slow degradation of metal by the flow of an electric current from metal to its surrounding
corrosion
method of water treatment which prevents corrosive water to increase the concentration of hazardous materials
corrosion control
method of water treatment wherein some organisism may not be injurious to health but can be rrapidly multiply that can cause clogging
nuisance control
method of water treatment which is a mechanism of contaminant removal by using the _ phenomenon which is the act of physical adhesion of molecule to the surface of the medium without chemical reaction
adsorption
method of water treatment that exposes small scale water supply to ultraviole
Ultraviolet Irradiation
what is the remaining liquid called in the process of water desalination
brine
