Biomethanation

Consider the following statements with reference to the Biomethanation:

  1. It is a process by which organic material is microbiologically converted under aerobic conditions to biogas.
  2. Three basic groups of microorganisms are used in Biomethanation - fermenting bacteria, organic acid oxidizing bacteria, and methanogenic archaea.
  3. Unlike other kinds of waste treatment processes, this process is completely self-sufficient and doesn’t require an external power source.

Which of the statement(s) given is/are correct?

A
1 and 3
B
Only 2
C
2 and 3
D
1, 2 and 3
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