Hotel Service Unit 10 Q9 Quiz

Correct Answer:
B) Aerobic bacteria break down organic matter in the presence of oxygen, converting it into simpler substances such as water and carbon dioxide

Explanation:
In aerobic sewage treatment plants, bacteria require oxygen to break down organic waste into harmless byproducts like water and carbon dioxide. This process ensures effective treatment of sewage through biological digestion.

Correct Answer:
B) By continuously bubbling air through the effluent using aeration devices such as air diffusers or mechanical aerators

Explanation:
Oxygen is supplied to aerobic bacteria by bubbling air through the effluent. Aeration devices, such as air diffusers or mechanical aerators, ensure a continuous supply of oxygen, allowing aerobic bacteria to break down organic waste effectively.

Correct Answer:
B) Aerobic bacteria would stop functioning, and anaerobic bacteria would take over, leading to incomplete waste breakdown and the production of harmful gases such as methane and hydrogen sulfide

Explanation:
Without oxygen, aerobic bacteria die, and anaerobic bacteria take over. This results in inefficient waste breakdown and the production of harmful gases like methane and hydrogen sulfide, which can create dangerous and toxic conditions.