Answer the three questions below. Cite all references in APA format. Answer these questions as if...

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Answer the three questions below. Cite all references in APA format. Answer these questions as if you are teaching it to someone. Each question must be at least 300 words
Do not plagerize !!!!!!!!!!!!!!

Characterize the differences among untreated, primary-treated, and secondary-treated sewage and compare and explain the effects of dumping each type on the eutrophication of a pond and a fast-moving river.

Flooding after two weeks of heavy rainfall in Tooele, Utah preceded a high rate of diarrheal illness. Giardia lamblia was isolated from 25% of the patients. A comparison study of a town 65 miles away revealed diarrheal illness in 2.9% of the people interviewed. Tooele has a municipal water system and a municipal sewage treatment plant.

Based on the information provided, what is the probable cause of this outbreak of diarrhea in Tooele?
What other possible causes are supported by these same facts?
What method(s) could be used to stop the current outbreak and prevent future outbreaks?

The bioremediation process shown in the photograph below is used to remove benzene and other hydrocarbons from soil contaminated by petroleum. The pipes are used to add nitrates, phosphates, oxygen, or water.

Why is each of these ingredients added?
Why is it not always necessary to add bacteria? How does one know when to add or not add and which one(s)?

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Robert · Accepted Answer

Answer the three questions below
Answer the three questions below.  Cite all references in APA format.  Answer these questions 
as if you are teaching it to someone.  Each question must be at least 300 words 
Do not plagerize !!!!!!!!!!!!!!
1. Characterize the differences among untreated, primary-treated, and secondary-treated 
sewage and compare and explain the effects of dumping each type on the eutrophication of a 
pond and a fast-moving river.
Ans. Untreated waters often contain high levels of organic matter from industrial and agricultural 
wastes, and from human wastes. It is necessary to remove organic matter by the process of waste 
water treatment. Many pathogens like bacteria, protozoa and viruses are present in untreated 
water. Primary treatment physically removes 20 to 30% of the BOD that is present in particulate 
form and thus there will be a slight increase in DO. In this treatment, particulate material is 
reduced by screening, precipitation of small particulates, and settling in basins or tanks. The 
resulting solid material is usually called sludge. Secondary treatment promotes the biological 
transformation of dissolved organic matter to microbial mass and carbon dioxide. About 90 to 
95% of the BOD and many bacterial pathogens are removed by this process which will 
ultimately increase dissolved oxygen. Under oxic conditions, dissolved organic matter will be 
transformed into additional microbial biomass plus carbon dioxide. When microbial growth is 
completed, under ideal conditions microbes will aggregate and form a settle able stable floc 
structure which can then be removed (Lesson 1: Wastewater Treatment).  
When untreated waste is dumped in pond or fast moving river, there is very less dissolved 
oxygen and waste content is high. Thus rate of eutrophication of dumping untreated water is very 
high due to large availability of nitrates and phosphates as wastes and also due to the availability 
of microbes which can decompose these waste matters. If primary treated water is dumped into 
pond water, then rate of eutrophical is lesser as compared to untreated water due to increase in 
DO and decrease in waste matter. Rate of eutrophication is lowest in secondary treated water 
because of decrease in waste matter.

Answer the three questions below. Cite all references in APA format. Answer these questions as if you are teaching it to someone. Each question must be at least 300 words Do not plagerize...

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