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After being disinfected, the water is released back into a river to return it to the natural water cycle. I don't believe we officially preformed this step in our lab but the closest to it would be pouring the finished product down the drain.

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This picture shows how wastewater is disinfected in real life, getting rid of all tiny organisms still present in the water.

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NEOTECUV INC. 2012 UV disinfection tank_0

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In this step, we added two teaspoons of bleach to our water to further disinfect the wastewater. We used this step to represent the tiny organisms being killed by adding chlorine gas to the water.

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For this procedure, we let the SST mixture sit for a minute and observed any changes that were produced within the water. This step in the lab represents the real life step in Secondary Settling/Treatment by trying to separate the "brown sludge" and the water in the beaker.

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Biological Treatment in real life consists of removing microorganisms and bacteria that could potentially harm humans if consumed.

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The water in this tank is being separated into clear water and brown sludge that layers on the bottom.

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In this step, we added fine sand and ENO's into the Bioreactor beaker to break down anything left in the water which relates to the real life Biological treatment step by representing the break down of bacteria.

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These are Settling tanks at a Wastewater Treatment plant, which reduces the velocity of wastewater flow allowing raw sludge to settle.

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In this part of the step, we used our finger to collect the left over debris in the PST beaker.

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In step three (Primary Settling), we used a plastic spoon with a cotton ball and a piece of panty hose secured with a rubber band to represent the scraper that removes the oil and debris from the wastewater.

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This picture shows how Wastewater Treatment plants remove grit from wastewater in real life. This a Vortex Grit Remover.

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In step two (Grit Removal), we poured the contents from the Grit Chamber into the PST beaker. We did this step to remove solid wastes even further than step one. We were careful to leave all grit behind and leave the mixture in the PST beaker for 1 minute. This step was to represent the Grit Removal step in real life, which removes all grit from the wastewater.

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This shows the first step in Wastewater Treatment in real life - Screening. Large objects that make it's way into the water get caught in this screen and get removed from the wastewater. They are removed so they don't cause damage to the pipes.

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We used this step in the lab to represent the first real life step in Wastewater Treatment - removal of large solid wastes. We used tea bag clippings, tea leaves, rocks, and other larger objects to represent objects we would see being removed from the wastewater like diapers an other objects that end up in the water.