During chemical treatment of drinking water and wastewater, which of the following microbes is least likely to be inactivated or killed?
a. Algae
b. Viruses
c. Fungal spores
d. Bacteria
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During chemical treatment of drinking water and wastewater, which of the following microbes is least likely to be inactivated or killed?
a. Algae
b. Viruses
c. Fungal spores
d. Bacteria
In which step is most of the organic content of sewage removed?
a. Primary treatment
b. Secondary treatment
c. Tertiary treatment
d. Sludge treatment
Which of the following is added during water or sewage treatment to promote flocculation?
a. Sludge
b. PHA
c. BOD
d. Alum
_________ is the amount of oxygen required by aerobic organisms to fully metabolize organic waste in water.
Compounds that can be used for energy and are made by microbes are called ________.
Industrial fermentation _________.
a. Always involves alcohol production
b. Involves the large-scale production of any beneficial compound
c. Refers to the oxidation of sugars using organic electron acceptors
d. Is any desirable change to food by microbial metabolism