Which type of bacteria plays a lesser role in converting sewage into "soil" liquids and gases?

The selection of anaerobic bacteria as the type that plays a lesser role in converting sewage into "soil" liquids and gases is due to their specific metabolic processes and optimal conditions for activity. Anaerobic bacteria thrive in environments devoid of oxygen and are involved in the breakdown of organic material in the absence of oxygen. While they do play a role in the decomposition of sewage, their primary function is in specialized processes, such as methane production during anaerobic digestion.

In wastewater treatment, while anaerobic bacteria can convert solids into biogas, the efficient processing of sewage into liquids and gases primarily occurs in the presence of oxygen. Aerobic bacteria, which require oxygen, are more effective in breaking down organic matter and converting it into stable, biodegradable forms, consequently producing useful end products like carbon dioxide and microbial biomass. This process results in a more complete treatment of sewage, leading to cleaner discharged effluent.

Facultative bacteria, which can switch between aerobic and anaerobic conditions, also contribute significantly to the breakdown of organic materials in varying environments, thereby further supporting the process of sewage treatment.

Pathogenic bacteria, while present in sewage, do not contribute to its conversion into soil liquids and gases and are largely a concern for potential health risks rather than aiding in the sewage