Advertisements
Advertisements
प्रश्न
Distinguish between the roles of flocs and anaerobic sludge digesters in sewage treatments.
Advertisements
उत्तर
Flocs contain aerobic microbes that grow in aeration tank during secondary treatment of effluent and consume a major part of the organic matter of the effluent.
In anaerobic sludge digester, anaerobic type of bacteria grow and digest the rest of the organic compounds and produce a mixture of gases such as methane, hydrogen sulphide and carbon dioxide (biogas).
APPEARS IN
संबंधित प्रश्न
Explain the process of secondary treatment given to the primary effluent up to the point it shows significant change in the level of biological oxygen demand (BOD) it.
Three water samples namely river water, untreated sewage water and secondary effluent discharged from a sewage treatment plant were subjected to BOD test. The samples were labelled A, B and C; but the laboratory attendant did not note which was which. The BOD values of the three samples A, B and C were recorded as 20 mg/L, 8 mg/L and 400 mg/L, respectively. Which sample of the water is most polluted? Can you assign the correct label to each, assuming the river water is relatively clean?
Describe how do 'flocs' and 'activated sludge' help in Sewage Treatment.
Removal of large pieces of floating debris, oily substances, etc. during sewage treatment is called _______________.
Small part of activated sludge is passed back into primary sedimentation tank.
If the above statement is correct then rewrite as it is and in case it is incorrect then reframe it.
Which of the following occurs during tertiary treatment?
After which of the following treatment BOD of the effluent is significantly reduced?
In the process of sewage treatment, the activated sludge is digested by ______
Methanogenic bacteria are not found in ______.
Wastewater treatment generates a large quantity of sludge, which can be treated by ______.
