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In this process, the water that is successfully treated and cleared of any harmful bacteria is returned back into a water source to be a part of the natural water cycle again. In our lab, the water was added into container and disposed of properly since it wasn't as clean as the process that happens in the real world. When comparing the waste water initially and the end product, a huge difference can be seen the water's quality.

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In this step,  two teaspoons of bleach were added to the water to disinfect the water of any harmful germs that still remain in the waste water. However, in the real world, chemicals such as chlorine ,ozone gas, and/or UV rays, are applied to the wastewater in order to kill any remaining bacteria.

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In this step, the container was rotated and the wastewater was emptied into another container. This step allowed the waste that had sank to the bottom remain at the bottom of the container and be disposed. In the real world, the waste would be considered to be sludge and it would be recycled into compost. The bacteria that was used in the biological treatment begins to clump up and settle to the bottom of the tank since that bacteria is still harmful to humans and the environment This bacteria is what the sludge is composed of.

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In this step, we added sand and ENOs to represent bacteria that would help feed on dissolved nutrients. The materials were added to the water to dissolve the bad bacteria. In the real world however, the good bacteria is added to digest carbon, nitrogen and phosphorus from the waste.

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In this step, a scraper was created to absorb the layer of oil and collect small leaves that were left over. The screen was made with a spoon,  cloth and cotton. The cotton was wrapped under the cloth and around the spoon and tied off with a rubber band. The spoon was then used to scrape off the oils and leaves from the top. In the real world, the water settles down in a tank which allows for the solid wastes and germs to settle to the bottom and the oil to rise. The oil is then scraped of with a rotating scraper. The waste at bottom is then recycled into fertilizers or other uses.

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In this step, the wastewater was mixed at a steady rate to allow the heavy materials that weren't collected by the screen to sink to the bottom of the container. Similarly, In the real world, this occurs to allow waste that wasn't collected by the screen to settle to the bottom of the grit chamber by using a strong current that spins the water around.

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In this step, we used a large screen to filter out the large materials before the cleaning process begins. The large materials such as pebbles and large tea leaves were filtered. In the real world, these objects would represent things like organisms, rock and solid plastics. This is done to prevent damages to the pipes and stop blockages.

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Although this isn't a required step, it felt appropriate to include how our wastewater was created and what it represents in the real world.  The lab's wastewater was created from tea leaves, oils and small pebbles. This would represent the waste materials that enter the water cleaning facility in the real world.