Sewage Treatment and Unit Processes Quiz

What is the purpose of primary treatment in sewage treatment?

• To add more solid materials to sewage

• To reduce the oxygen content in sewage

• To increase the amount of suspended solids in sewage

• To remove solid materials and suspended solids from sewage.

Name one common unit process used in primary treatment.

• Reverse osmosis

• Filtration

• Sedimentation

• Chlorination

What is the main goal of secondary treatment in sewage treatment?

• Remove dissolved and suspended biological matter

• Promote the growth of harmful bacteria

• Remove chemical pollutants

• Increase dissolved and suspended biological matter

Explain the difference between aerobic and anaerobic secondary treatment processes.

• Aerobic processes produce methane gas, while anaerobic processes produce carbon dioxide.

• Aerobic processes use oxygen, while anaerobic processes do not require oxygen.

• Aerobic processes occur in the absence of microorganisms, while anaerobic processes require the presence of microorganisms.

• Aerobic processes use carbon dioxide, while anaerobic processes use oxygen.

What is the purpose of tertiary treatment in sewage treatment?

• To reduce the oxygen content in the wastewater

• To add more contaminants to the wastewater

• To further purify the wastewater by removing remaining contaminants

• To make the wastewater suitable for drinking without any further treatment

Name one advanced treatment method used in tertiary treatment.

• Membrane filtration

• Aeration

• Sedimentation

• Chemical precipitation

Describe the activated sludge process and its role in sewage treatment.

• The activated sludge process is a mechanical process that separates solid waste from sewage.

• The activated sludge process is a biological wastewater treatment process that uses microorganisms to break down organic matter in sewage.

• The activated sludge process is a chemical treatment process that uses chlorine to disinfect sewage.

• The activated sludge process is a physical process that involves the use of filters to remove impurities from sewage.

What are the key components of an anaerobic digestion system?

• Aerobic bacteria, sunlight, and water

• Wind turbine, solar panels, and batteries

• Fertilizer, pesticides, and herbicides

• A digester, feedstock, microorganisms, and a biogas collection system

How does anaerobic digestion contribute to the overall sewage treatment process?

• It breaks down organic matter in sewage and produces biogas.

• It reduces the amount of biogas produced in sewage

• It has no impact on the overall sewage treatment process

• It increases the amount of solid waste in sewage

Explain the concept of biogas production in anaerobic digestion.

• The production of biodegradable plastics from organic waste

• The breakdown of organic matter by microorganisms in the absence of oxygen, resulting in the release of methane and carbon dioxide gases.

• The extraction of natural gas from underground reserves

• The process of converting sunlight into energy through photosynthesis