68S PMT 108 PRINCIPALS OF WATER V2
UNIT 5 QUESTIONS AND ANSWERS
100% CORRECT.
, Raw Sludge - ANSWERSludge obtained from plain sedimentation tanks is essentially
the settleable solids in the raw sewage, can become septic and cause offensive odors.
Stabilization - ANSWERThe use of a treatment process to render domestic wastewater
residuals less odorous or putrescible and to reduce the pathogen content.
Sludge - ANSWERRefers for the residual, semi-solid material left from industrial
wastewater or sewage treatment process. This term is not interchangeable with
biosolids
Thickening - ANSWERAn economically effective process to increase the sludge's
concentration and decrease the sludge's volume by removing some free water to the
extent where the sludge remains in the fluid state
Dewatering - ANSWERCharacterized as the process of natural or mechanical removal
of water from sludge during which sludge is losing its fluidity, becomes a damp solid and
can be transported in bulk
Biosolids - ANSWERNutrient rich organic materials derived from wastewater solids that
have been stabilized through processing and meets U.S. EPA or other applicable
criteria for beneficial use
Sludge Treatment - ANSWERPrimary treatment of domestic wastewater which creates
the sludge. Contains approximately 65% organic material.
Secondary treatment sludge contains about 90% organic material.
Digestion - ANSWERThe process by which the solids generate in the primary and
secondary sedimentation basins are stabilized and dewatered.
Best tang 85-95°F.
Sludge Digesters (Sludge Stabilization) - ANSWEROrgánica are concentrated in the
sludge and stabilized under aerobic or anaerobic conditions.
Aerobic Digestion - ANSWERBiological oxidation of organic sludge under aerobic
conditions
Anaerobic Digestion - ANSWERBiochemical breakdown of organic solids in the
absence of free oxygen.
Elutriation - ANSWERSludge is washed with water or plant's effluent and chemicals to
reduce alkalinity.
UNIT 5 QUESTIONS AND ANSWERS
100% CORRECT.
, Raw Sludge - ANSWERSludge obtained from plain sedimentation tanks is essentially
the settleable solids in the raw sewage, can become septic and cause offensive odors.
Stabilization - ANSWERThe use of a treatment process to render domestic wastewater
residuals less odorous or putrescible and to reduce the pathogen content.
Sludge - ANSWERRefers for the residual, semi-solid material left from industrial
wastewater or sewage treatment process. This term is not interchangeable with
biosolids
Thickening - ANSWERAn economically effective process to increase the sludge's
concentration and decrease the sludge's volume by removing some free water to the
extent where the sludge remains in the fluid state
Dewatering - ANSWERCharacterized as the process of natural or mechanical removal
of water from sludge during which sludge is losing its fluidity, becomes a damp solid and
can be transported in bulk
Biosolids - ANSWERNutrient rich organic materials derived from wastewater solids that
have been stabilized through processing and meets U.S. EPA or other applicable
criteria for beneficial use
Sludge Treatment - ANSWERPrimary treatment of domestic wastewater which creates
the sludge. Contains approximately 65% organic material.
Secondary treatment sludge contains about 90% organic material.
Digestion - ANSWERThe process by which the solids generate in the primary and
secondary sedimentation basins are stabilized and dewatered.
Best tang 85-95°F.
Sludge Digesters (Sludge Stabilization) - ANSWEROrgánica are concentrated in the
sludge and stabilized under aerobic or anaerobic conditions.
Aerobic Digestion - ANSWERBiological oxidation of organic sludge under aerobic
conditions
Anaerobic Digestion - ANSWERBiochemical breakdown of organic solids in the
absence of free oxygen.
Elutriation - ANSWERSludge is washed with water or plant's effluent and chemicals to
reduce alkalinity.
