The zoogliamass uses some phosphorous to create new phospholipid bilayers (cell parts of new microorganisms), when the bacteria reproduce. The water is then pumped to secondary clarifiers. Here, water slows down and waste is able to float to top or sink to bottom. A polymer is added to help bacteria clump together and settle better. Ferric chloride is also added to remove phosphorous. This is because it is attracted to phosphorus and helps to make it heavy and settle to the bottom. Part of the activated sludge at bottom of tanks gets pumped back to aeration tanks to continue eating more matter. However, if nothing else was done regarding the bacteria, it would continue to grow. In order to keep the bacteria level constant, some are sent back as activated sludge, and the other part is sent to the solid waste building. The
…show more content…
At this point the water is “pretty clean”. For the third and final step, sand and gravel filter at bottom, removing all remaining suspended solids. A film forms on sand and gravel and suspended solids cling to the film. Next, the water must be disinfected and rid of all bacteria. There are two ways to do this. One way is the method that used to be used: use chlorine to kill the bacteria. This is bad because the chlorine then goes into river and kills many living things in river. Chlorine can also turn into gas, which is deadly. Now, however, the plant uses UV light which merely mutates bacteria’s DNA so they can no longer reproduce. The effluent, or out-flowing, water is pumped out to Beaver Run, which then feeds into Tinker’s Creek, which then empties out into the Cuyahoga River, which goes to Lake Erie. The remaining amount of B.O.D. is .61 ppm. The remaining amount of Ammonia (Nitrogen) left is .07 ppm, a drastic decrease. The amount of phosphorous left was .49 ppm. Trace amounts of mercury, copper, and lead are still left, but not enough to harm
At this point the water is “pretty clean”. For the third and final step, sand and gravel filter at bottom, removing all remaining suspended solids. A film forms on sand and gravel and suspended solids cling to the film. Next, the water must be disinfected and rid of all bacteria. There are two ways to do this. One way is the method that used to be used: use chlorine to kill the bacteria. This is bad because the chlorine then goes into river and kills many living things in river. Chlorine can also turn into gas, which is deadly. Now, however, the plant uses UV light which merely mutates bacteria’s DNA so they can no longer reproduce. The effluent, or out-flowing, water is pumped out to Beaver Run, which then feeds into Tinker’s Creek, which then empties out into the Cuyahoga River, which goes to Lake Erie. The remaining amount of B.O.D. is .61 ppm. The remaining amount of Ammonia (Nitrogen) left is .07 ppm, a drastic decrease. The amount of phosphorous left was .49 ppm. Trace amounts of mercury, copper, and lead are still left, but not enough to harm