Hotel Service Unit 10 Q9 Quiz

Hotel Service Unit 10 Sewage Q9

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How is a sufficient supply of oxygen ensured in an aerobic sewage treatment plant?

C) By adding chemicals to the sewage

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

A) By maintaining a high temperature in the effluent

D) By keeping the plant in a sealed environment

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What would happen if there is no supply of oxygen in an aerobic sewage treatment plant?

A) The sewage would evaporate

C) The plant would start producing more oxygen

D) The temperature of the sewage would drop significantly

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

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What is the biological operating principle of an aerobic sewage treatment plant?

D) Waste is incinerated at high temperatures

A) Organic matter is broken down using bacteria in the absence of oxygen

C) Chemical reactions are used to neutralize waste

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

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