SELECT * FROM question_mgmt as q WHERE id=470 AND status=1 SELECT id,question_no,question,chapter FROM question_mgmt as q WHERE courseId=3 AND subId=7 AND chapterId=35 and ex_no='1' AND status=1 ORDER BY CAST(question_no AS UNSIGNED)

Question: What is the key difference between primary and secondary sewage treatment?

Answer:

 

Primary sewage treatment

 

Secondary sewage treatment

1.

It is a mechanical process involving the removal of coarse solid materials.

1.

It is a biological process involving the action of microbes.

2.

It is inexpensive and relatively less complicated.

2.

It is a very expensive and complicated process.

 


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Taking Screenshots on your Samsung Galaxy M31s is very easy and quick.

  • Answered by Ekta Mehta
  • 4 months ago

Taking Screenshots on your Samsung Galaxy M31s is very easy and quick.

  • Answered by Ekta Mehta
  • 4 months ago

Taking Screenshots on your Samsung Galaxy M31s is very easy and quick.

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