Intake: Water is taken from a source such as a lake or river. Large items such as logs, fish and plants are screened out at the intake. Only then is the water drawn into the treatment plant. If the source is groundwater, the screening is, in fact, done by the soil as the water travels under the earth's surface. Sometimes very little treatment is required for groundwater.
Chemical Addition: Polyaluminum chloride, polymers, carbon and/ or chlorine are added to the water. These chemicals kill germs, improve taste and odor, and help settle solids remaining in the water.
Coagulation and Flocculation: The chemicals added to the water cling to particles already in the water, a process called coagulation. These particles subsequently stick together and form larger particles called floc, a process called flocculation.
Sedimentation: Water containing floc particles flows into a sedimentation basin, where floc settles to the bottom and is removed from the water.
Filtration: From the sedimentation basin, water flows through filters made of sand and gravel layers, which remove any remaining particles in the water.
Disinfection: A small amount of chlorine is added or other disinfecting chemicals may be added to kill any remaining germs and keep the water safe as it travels through the distribution system to the public. In some water systems, especially those with groundwater sources, chlorination is the only treatment provided.
Storage: Water is placed in a closed tank or reservoir called a clear well to allow time for the chlorine to mix throughout the water in order to disinfect it. The water then flows into the distribution system.
Intake: Water is taken from a source such as a lake or river. Large items such as logs, fish and plants are screened out at the intake. Only then is the water drawn into the treatment plant. If the source is groundwater, the screening is, in fact, done by the soil as the water travels under the earth's surface. Sometimes very little treatment is required for groundwater.Chemical Addition: Polyaluminum chloride, polymers, carbon and/ or chlorine are added to the water. These chemicals kill germs, improve taste and odor, and help settle solids remaining in the water.Coagulation and Flocculation: The chemicals added to the water cling to particles already in the water, a process called coagulation. These particles subsequently stick together and form larger particles called floc, a process called flocculation.Sedimentation: Water containing floc particles flows into a sedimentation basin, where floc settles to the bottom and is removed from the water.Filtration: From the sedimentation basin, water flows through filters made of sand and gravel layers, which remove any remaining particles in the water.Disinfection: A small amount of chlorine is added or other disinfecting chemicals may be added to kill any remaining germs and keep the water safe as it travels through the distribution system to the public. In some water systems, especially those with groundwater sources, chlorination is the only treatment provided.Storage: Water is placed in a closed tank or reservoir called a clear well to allow time for the chlorine to mix throughout the water in order to disinfect it. The water then flows into the distribution system.
การแปล กรุณารอสักครู่..
