What is the purpose of adding chlorine to water during the water treatment process quizlet?

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What is the purpose of adding alum to water during the water treatment process quizlet?
What is a process that includes filtration and chlorination?
What processes are used at a water purification plant to produce potable water quizlet?
What is an inexpensive solution to providing everyone with more fresh water to use *?

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The order of treatment processes for raw water as it passes through the drinking water treatment process starts with the raw water from the water source through an intake structure which is to allow water to enter and prevent debris such as leaves from entering the the water treatment plant clogging or damaging pipes, pumps, and other treatment equipment. This structure usually employs a number of different screens to accomplish this. As the raw water is taken in a process of prechlorination (where chlorine is added to help control tastes, odor, and prevent pathogenic organisms and algae) and chemical coagulants (such as alum) are added and are transferred to the flash mixer to thoroughly mix with the water. The added alum helps to reduced the turbidity in the water by clumpping the suspended solids in the water together forming larger solids called floc. After the flash mixer it proceeds to the coagulation-flocculation chamber where paddles slowly mix the water to help the particles (solids) collide and clump together. The water then flows into a sedimentation take where the water flows very slowly allowing the the heavier particles to settle out of the water being treated. In some treatment plants they with use little air jets at the bottom to allow air to move through pushing the solids to the top where a skimmer can then remove them from the treated water. Water leaves the sedimentation basin by flowing over weirs at the outlet end of the basin and then passes through a filter such as sand, anthracite coal, or some other type of granular material or combination of them. The sedimentation and filter portions of the process remove the vast majority of suspended particles in the water which makes it clear. From there it is then disinfected by the use of chlorine, ozone, or ultraviolet light to kill off or render any pathogenic organisms harmless. Additional treatment might be required based on its pH, corrosivity, and other factors. The treated water is then stored in a large tank or basin called a clear well until it is pumped into the distribution system for use or to serve as storage during low periods and used for periods of high demand.

A groundwater well is producing water with the following lab results:
Dissolved iron, Fe: 0.01 mg/L
Hydrogen sulfide, H2S: 0.05 mg/L
pH: 7.85
Temperature, oC 19.5
Total alkalinity, CaCO3: 145 mg/L
Total hardness, CaCO3: 108 mg/L
True color, units: 2.5 CU
Manganese, Mn 0.004 mg/L
Nitrate, N: 0.06 mg/L
Turbidity, NTU: 0.35
Bacteriological, CFU: Non detect

Using Tables 1.2 and 1.3 of primary and secondary MCLs, which treatment method(s) would be necessary for this water source?

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What is the purpose of adding alum to water during the water treatment process quizlet?

Air is pumped into water during aeration. The process of purifying water by adding alum and other chemicals that cause clumping of some impurities. Alum causes the coagulation of dirt in water. The settling of solid material to the bottom of a liquid.