What happens in anaerobic sludge digester?

(A) Anaerobic bacteria digest the bacteria and fungi in the sludge
(B) Aerobic bacteria digest the bacteria and fungi in the sludge
(C) Methane and Carbon dioxide is produced
(D) Methane and Nitrogen dioxide is produced

Choose the correct answer from the options given below:

(A) and (C)

The correct answer is Option (2) → (A) and (C)

In an anaerobic sludge digester:

(A): Anaerobic bacteria digest the organic matter, including bacteria and fungi, present in the sludge. These bacteria break down complex organic compounds in the absence of oxygen.

(C): During this digestion, bacteria produce a mixture of gases such as methane, hydrogen sulphide and carbon dioxide. These gases form biogas and can be used as source of energy as it is inflammable.

Analysis of Other Options:

(B): Aerobic bacteria require oxygen to digest organic matter, which does not occur in an anaerobic sludge digester.

(D): Nitrogen dioxide is not typically produced in this process; instead, methane and carbon dioxide are the primary gases generated.