21. Removal of microorganisms from the sewage water is by (a) Aeration (b) Pre-screening (c) Disinfection (d) Sludge removal
Answers
Water is purified with filters to remove larger protozoans, and by chemical or UV disinfection to kill bacteria and other small pathogens.
microorganisms removed from wastewater
Water is purified with filters to remove larger protozoans, and by chemical or UV disinfection to kill bacteria and other small pathogens.
Lagooning is another method for removing nutrients and waste from sewage. Water is stored in a lagoon and native plants, bacteria, algae, and small zooplankton filter nutrients and small particles from the water.
Following group of microorganisms are mainly present in wastewater treatment process.
- Bacteria. ...
- Protozoa. ...
- Metazoa. ...
- Filamentous bacteria. ...
- Algae. ...
- Fungi
Hence, Removal of microorganisms from the sewage water is by Lagooning.
Correct option :
(c) Disinfection
Explanation: For the removal of microorganisms from sewage water UV disinfection is used. It kills bacteria and other small pathogens.