A trickling filter system is generally used
A. to remove small objects.
B. to remove phosphorus.
C. to increase the amount of sewage sludge.
D. to remove dissolved organic matter.
Answer: D
You might also like to view...
At a wastewater treatment plant, the primary purpose of secondary treatment is to ________
A) remove the organic matter remaining in the wastewater B) remove bacteria and other pathogenic organisms C) remove the large solids D) remove toxic chemicals such as pesticides and heavy metals
The bonding between Cl and Na in halite (table salt) is
A. ionic B. male C. covalent D. metallic
Which of the following was the biggest issue associated with Hurricane Harvey?
A. wind B. storm surge C. evacuation route destroyed D. inland flooding
All of the following are examples of external costs that may be imposed on local residents by a shale gas drilling operation EXCEPT
a. air pollution. b. noise pollution. c. water pollution. d. employee salaries.