1. Secrets of Stanley By Anne Holyoak and Daniel Tollefsen

4. Bars that filter the sewage, coarse material from fine material

7. Bars that filter the sewage, coarse material from fine material

9. Tertiary Treatment The last stage that the waste must go through is the Tertiary Treatment. This stage must be completed before the materials flow into the environment, like in Stanley where it goes into the Sea. Part of the tertiary treatment is the filtration part. During this phase the waste gets rid of any remaining residual toxins. Along with removing toxins, waste must also be decontaminated of high levels of nutrients. Having too many nutrients released into an environment can cause a build up, eutrophication. As a side effect, the surrounding areas experience an overgrowth of unwanted plant life. When the plants decompose they use up a majority of the oxygen. This leaves little to none for the nearby animals. This is a vicious cycle that can be majorly avoided if the waste treatment is completed properly. Nitrogen and Phosphorus need to be removed before entering into an environment. Through denitrification, high levels of nitrogen are removed. Similarly, phosphorus is removed through a process called Enhanced biological phosphorus removal. Through these processes the contaminating parts of the waste materials are depleted making the waste safe for disposal.

10. Tertiary Treatment Turtle Cove

11. Nitrogen Cycle

14. Yes it is…