Basic Wastewater Operations- Chapter 9 (Fixed-Film Treatment) Exam Questions with Verified
Solutions (Rated A+) Already Passed
T/F: The microorganisms in fixed-film processes are attached to rocks or plastic media. - Answers True
T/F: The four basic parts of trickling filter are media, underdrain, tank walls/floor, and the distributor. -
Answers True
T/F: The media provides the surface area upon which a biological slime growth, called zoogleal mass,
develops. - Answers True
T/F: Zoogleal mass consists of aerobic, anaerobic, and facultative organisms including bacteria, protozoa,
and fungi. - Answers True
T/F: The media may be rock, steel, or molded plastic. - Answers False
T/F: The underdrain system of a trickling filter, located above the media, collects the filter effluent. -
Answers False
T/F: The purpose of the distributor is to support the media. - Answers False
T/F: The zoogleal mass must remain dry or it will die. - Answers False
T/F: The wastewater distributed on the media first passes through a final clarifier, but still contains
about 65% of its organic matter. - Answers False
T/F: When the zoogleal mass grows thick, some of it sloughs off or breaks off, then settles in a secondary
clarifier. - Answers True
T/F: Sloughed material settled in the final clarifier is called humorous sludge. - Answers False
T/F: Fixed-filmed processes include trickling filters and ___________.
A. RCBs
B. RBCs
C. BCRs
D. CRBs - Answers B. RBCs
Filters are classified according to _____________ and ________________ loading.
A. Hydraulic/pneumatic
B. Hydraulic/inorganic
C. Hydraulic/organic
Solutions (Rated A+) Already Passed
T/F: The microorganisms in fixed-film processes are attached to rocks or plastic media. - Answers True
T/F: The four basic parts of trickling filter are media, underdrain, tank walls/floor, and the distributor. -
Answers True
T/F: The media provides the surface area upon which a biological slime growth, called zoogleal mass,
develops. - Answers True
T/F: Zoogleal mass consists of aerobic, anaerobic, and facultative organisms including bacteria, protozoa,
and fungi. - Answers True
T/F: The media may be rock, steel, or molded plastic. - Answers False
T/F: The underdrain system of a trickling filter, located above the media, collects the filter effluent. -
Answers False
T/F: The purpose of the distributor is to support the media. - Answers False
T/F: The zoogleal mass must remain dry or it will die. - Answers False
T/F: The wastewater distributed on the media first passes through a final clarifier, but still contains
about 65% of its organic matter. - Answers False
T/F: When the zoogleal mass grows thick, some of it sloughs off or breaks off, then settles in a secondary
clarifier. - Answers True
T/F: Sloughed material settled in the final clarifier is called humorous sludge. - Answers False
T/F: Fixed-filmed processes include trickling filters and ___________.
A. RCBs
B. RBCs
C. BCRs
D. CRBs - Answers B. RBCs
Filters are classified according to _____________ and ________________ loading.
A. Hydraulic/pneumatic
B. Hydraulic/inorganic
C. Hydraulic/organic
