Question

Anaerobic digestion is caused by ______________.

• A. Acetobacter
• B. Acetogenic bacteria
• C. Methanogenic bacteria
• D. All of the above

Answer 1

The correct option is D All of the above

During anaerobic digestion, microorganisms break down biodegradable substances in the absence of oxygen. Many different microorganisms may be involved in the process, including acetic acid-forming bacteria (acetogens) and methane-forming archaea (methanogens). Clostridium and Pseudomonas are species of bacteria that are obligatory anaerobes and can cause anaerobic digestion only if oxygen accidentally enters the process. So, Acetogenic bacteria, Acetobacter, and methanogenic bacteria all can cause anaerobic digestion. So, the correct options is ' All of the above'.