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  • Match column I with column II and select the correct answer from the given codes. A.

Match column I with column II and select the correct answer from the given codes.

A. The stage in which physical treatment of sewage is done

 (i) Anaerobic digestion activated sludge and production of biogas
B. The stage in which biological treatment of sewage is done (ii) Activated sludge
C. Name of the sediment in the primary treatment  (iii) Aeration Tanks

D. It is carried to aeration tanks from primary settling

 (iv) Primary effluent
E. Name of the sediment in secondary treatment  (v) Primary Sludge
F. Site of flocs growth  (vi) Secondary treatment
G. Function of sludge digester (vii) Primary treatment

 

Option: 1

A - (vii), B - (vi), C-(v), D-(iv), E- (ii), F-(iii), G-(i)


Option: 2

A-(i), B-(iii), C-(v), D-(vii), E- (ii), F-(iv), G-(vi)


Option: 3

A-(i), B-(ii), C-(iii), D-(iv), E- (v), F-(vi), G-(vii)


Option: 4

A - (vii), B - (vi), C-(i), D-(ii), E- (iii), F-(iv), G-(v)


Answers (1)

best_answer

 

 

As we have already discussed in Microbes in Sewage Treatment -

 

Secondary treatment or Biological treatment -

anaerobic sludge digesters

- wherein

A small part of the activated sludge is pumped back into the aeration tank to serve as the inoculum. The remaining major part of the sludge is pumped into large tanks called anaerobic sludge digesters

Hence, the correct option is (a).

 

 

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vinayak

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