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Question

 Which of the following best indicates the steps inside an anaerobic digester?

A.
Hydrolysis → methanogenesis → acetogenesis → acidogenesis
B.
Hydrolysis → acidogenesis → methanogenesis → acetogenesis
C.
Hydrolysis → acidogenesis → acetogenesis → methanogenesis
D.
Methanogenesis → acidogenesis → acetogenesis → hydrolysis
Answer ( Option C)

Hydrolysis → acidogenesis → acetogenesis → methanogenesis

Solution

The waste is first hydrolyzed and then acidized. After acidizing, the product is then used to produce acetates which is further used to create methane in the final stage. Methanogenesis is the process of creating methane.

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