During secondary aerobic wastewater treatment, some of the activated sludge goes ________ while the rest goes ________
A) back to the aerator / to the anoxic sludge digestor
B) back to the primary system / to the aerator
C) to the anoxic digestor / back to the primary system
D) back to the primary system / to the tertiary digestor
Answer: A
You might also like to view...
Where does the process of independent assortment occur in meiosis?
a. prophase I b. metaphase I c. anaphase I d. telophase I
Four of the following statements about Neanderthals are true. Which statement is false?
a. Neanderthals diverged from modern humans around 500,000 years ago. b. Neanderthals lived in Europe and the Near East. c. Neanderthals are direct ancestors of Homo sapiens. d. Neanderthal brains may have been larger than those of modern humans. e. Neanderthals have no modern descendants.
"Bubbles" along a strand of DNA indicate that
A. DNA replication is occurring. B. RNA synthesis is taking place. C. transcription is occurring. D. All of these are possible.
Histology is the study of
(a) cells. (b) organelles. (c) tissues. (d) organisms.