and through these units. The debris is collected against the screen, or outside
drum, and the teeth, which penetrate this screen cut up the solids. When the solids
are reduced to the size of the screen or drum openings, they pass through and on
for additional downstream wastewater treatment. The barminutor is a comminuting device that incorporates revolving cutters that move up and down the
upstream face of a bar screen, shredding and cutting whatever debris has accumulated against the screen. The screenings are transported to the cutting device,
shredded, and then allowed to fall back into the influent channel downstream of
the bar screen.
Comminutor A device used to reduce the size of the solid chunks in wastewater by
shredding (comminuting). The shredding action is like many scissors cutting or
chopping to shreds all the large influent solids material in the wastewater.
Community Emergency Response Team (CERT) A program that educates people about disaster preparedness and provides training in basic disaster response
skills.
Complete mix activated sludge process It is an activated process, in which
aeration tank (with about 3–5 hours DT) is usually circular and the influent
wastewater and the mixed liquor are completely mixed during aeration operation.
It is most useful for treating wastewater with fluctuating organic strength, because
it is least susceptible to shock loads among all activated sludge processes. A
mechanically stirred reactor best simulates a complete mix condition. When
diffused aeration in a rectangular aeration tank is used, the mixture of wastewater
influent and the return sludge should enter the aeration tank at several points in a
central location with the effluent going into channels on the sides of the
aeration tank.
Complex A substance consisting of many different and connected parts.
Composite A composite sample is a collection of individual samples obtained at
regular intervals, usually every one or two hours during a 24-hour time span.
Each individual sample is combined with the others in proportion to the rate of
flow when the sample was collected. The resulting mixture (composite sample)
forms a representative sample and is analyzed to determine the average conditions
during the sample period.
Compost It is decayed organic material used as a plant fertilizer.
Composting It is an aerobic biological process designed to reduce organic concentrations, reclaim nutrients, and eliminate pathogenic organisms in the waste
sludge or solid wastes. There are at least three major types of composting
systems: (a) aerated static pile composting system; (b) windrow composting
system; and (c) the in-vessel composting system. Sludge, wood chips leaves,
etc., that have been composted properly is a sanitary, nuisance-free, humus-like
material. The end product can be used as a soil additive or landfill cover
component.
Composting latrine It is a type of dry (not using water) latrine, which treats human
excreta using a biological process called composting, which decomposes excreta
and organic matter into a compost-like material but does not destroy all
pathogens.
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M.-H. S. Wang and L. K. Wang
drum, and the teeth, which penetrate this screen cut up the solids. When the solids
are reduced to the size of the screen or drum openings, they pass through and on
for additional downstream wastewater treatment. The barminutor is a comminuting device that incorporates revolving cutters that move up and down the
upstream face of a bar screen, shredding and cutting whatever debris has accumulated against the screen. The screenings are transported to the cutting device,
shredded, and then allowed to fall back into the influent channel downstream of
the bar screen.
Comminutor A device used to reduce the size of the solid chunks in wastewater by
shredding (comminuting). The shredding action is like many scissors cutting or
chopping to shreds all the large influent solids material in the wastewater.
Community Emergency Response Team (CERT) A program that educates people about disaster preparedness and provides training in basic disaster response
skills.
Complete mix activated sludge process It is an activated process, in which
aeration tank (with about 3–5 hours DT) is usually circular and the influent
wastewater and the mixed liquor are completely mixed during aeration operation.
It is most useful for treating wastewater with fluctuating organic strength, because
it is least susceptible to shock loads among all activated sludge processes. A
mechanically stirred reactor best simulates a complete mix condition. When
diffused aeration in a rectangular aeration tank is used, the mixture of wastewater
influent and the return sludge should enter the aeration tank at several points in a
central location with the effluent going into channels on the sides of the
aeration tank.
Complex A substance consisting of many different and connected parts.
Composite A composite sample is a collection of individual samples obtained at
regular intervals, usually every one or two hours during a 24-hour time span.
Each individual sample is combined with the others in proportion to the rate of
flow when the sample was collected. The resulting mixture (composite sample)
forms a representative sample and is analyzed to determine the average conditions
during the sample period.
Compost It is decayed organic material used as a plant fertilizer.
Composting It is an aerobic biological process designed to reduce organic concentrations, reclaim nutrients, and eliminate pathogenic organisms in the waste
sludge or solid wastes. There are at least three major types of composting
systems: (a) aerated static pile composting system; (b) windrow composting
system; and (c) the in-vessel composting system. Sludge, wood chips leaves,
etc., that have been composted properly is a sanitary, nuisance-free, humus-like
material. The end product can be used as a soil additive or landfill cover
component.
Composting latrine It is a type of dry (not using water) latrine, which treats human
excreta using a biological process called composting, which decomposes excreta
and organic matter into a compost-like material but does not destroy all
pathogens.
438
M.-H. S. Wang and L. K. Wang