What is the key difference between prima | Class 12 Biology Chapter Microbes in Human Welfare, Microbes in Human Welfare NCERT Solutions

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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Comments

  • Shreya awasthi
  • 2019-12-11 06:57:49

Not properly answered


  • Ak
  • 2018-09-15 00:59:07

Yoooo


  • kushal
  • 2017-09-20 08:46:37

Thank you so much


  • Om Kumar Patra
  • 2017-02-03 23:42:34

Thanks for this answer.


Comment(s) on this Question

Welcome to the NCERT Solutions for Class 12 Biology - Chapter . This page offers a step-by-step solution to the specific question from Excercise 1 , Question 8: What is the key difference between primary and secondary sewage treatment?....