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Treatment of Sewage Sewage treatment is basically the process involved when wastewater from households is treated by removing any contaminants in it. In a water treatment plan, biological, chemical and physical processes are used to remove contaminants found in the sewage for the water to be safe for the environment. Sludge is the term for the semi-solid waste that is sewage before it has been treated. This sludge usually goes through various treatment stages before it is suitable for land application or disposal. In Sewage treatment is also referred to as wastewater treatment. Commercial, institutional, residential as well as industrial establishments are responsible for generating sewage. The water used in most households in showers, sinks, kitchens, showers among others forms the sewage that flows in sewers. Sewage from the sewers is carried into the treatment plant using large pipes put in place. Water treatment is usually a process and it occurs in various stages. Bottles, rags, face wipes, sanitary, diapers and other large contaminants are usually removed from the wastewater during the first stage known as screening. These objects are removed first in order to prevent them from damaging the equipment used in the plant and prevent blockage as well. The grit that is washed into the sewer is gotten rid of by using special equipment. Separation of wastewater from organic solid matter is usually the second stage of sewage treatment. Human waste which forms the organic solid matter is gotten rid of by passing the sewage into settlement tanks. The solid waste that sinks to the bottom of the tank after the sewage has settled is referred to as sludge. In the treatment plant, there are large scrappers used to scrape away the solid waste settled at the bottom of the tanks and is pushed to another compartment where further treatment is carried out. The other water is put into tanks referred to as aeration lanes. The small bits of sludge that gets through to the wastewater are broken down using bacteria.
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During the final treatment stage, the wastewater goes through a settlement tank. The small bits of sludge in the mixture settles at the bottom once the bacteria acts on the wastewater. Once the process is over, the water is devoid of any harmful substances such as chemicals or toxins. Filtration is the final stage where wastewater goes through a wall made of sand in order to remove any additional particles.
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The water that is released into the environment after the treatment process is usually devoid of any toxins or contaminants which is why this process is very useful. The water can be purified to be pumped into homes for people to use for domestic purposes without it getting wasted.