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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Read the question carefully and focus on the core concept being asked.
Reference examples and data from the chapter when answering questions about Microbes in Human Welfare.
Review previous year question papers to get an idea of how such questions may be framed in exams.
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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.

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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?....

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

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	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.