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Sewage treatment: Quiz


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Question 1: The purpose of digestion is to reduce the amount of organic matter and the number of disease-causing ________ present in the solids.

Question 2: One major feature of anaerobic digestion is the production of ________ (with the most useful component being methane), which can be used in generators for electricity production and/or in boilers for heating purposes.
BioenergyEthanol fuelBiofuelBiogas

Question 3: Industrial sources of wastewater often require specialized treatment processes (see ________).
Water purificationAgricultural wastewater treatmentIndustrial wastewater treatmentComposting

Question 4: Future plans call for increased use of treated sewer water as well as more ________.
DesalinationMulti-stage flash distillationMultiple-effect distillationElectrodialysis reversal

Question 5: ________, fats, organic short-chain carbon molecules, etc.) and bind much of the less soluble fractions into floc.
HoneyMetabolismHigh-fructose corn syrupSugar

Question 6: One of the key benefits of an MBR system is that it effectively overcomes the limitations associated with poor settling of sludge in conventional ________ (CAS) processes.
Sewage treatmentAerated lagoonActivated sludgeIndustrial wastewater treatment

Question 7: In addition to causing deoxygenation, some algal species produce toxins that contaminate ________ supplies.
MoroccoWater purificationAzerbaijanDrinking water

Question 8: Sewage treatment, or domestic wastewater treatment, is the process of removing ________ from wastewater and household sewage, both runoff (effluents) and domestic.
Air pollutionMarine pollutionWater pollutionPollution

Question 9: Wastewater may contain high levels of the nutrients ________ and phosphorus.

Question 10: The most common treatment options include anaerobic digestion, ________, and composting.
Composting toiletWindrow compostingCompostingHome composting

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