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During the lab we used bleach to disinfect the wastewater. In real life, UV light or chlorine is used most often.

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In both the lab and real life, we let the secondary sludge settle and then proceeded to pour the purified water into the tank.

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In the lab we added the river sand and ENOS which represents the bacteria used in the wastewater treatment that get rid of the dissolved materials.

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In the lab and in real life, the oil floated to the top and the solids settled to the bottom. After that we removed the solids and put them in the waste jar.

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Grit Removal is the process in which the water slows down to let the grit sink to the bottom. In the lab, we stirred the rocks in the grit chamber in a attempt to make it sink to the bottom as well.

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Screening is the process in which we filter out the large solid object from the water. We represented this in the lab by putting an orange screen over the Grit Chamber and poured the wastewater filled with solids inside.