Question

Match the term in column A with best definition in column B

Column A Column B

Glucose Autotrophs

Carbondioxide Heterotrophs

Light Phototrophs

Denitrification Oxygen

Aerobic Nitrate

Anaerobic sulphate

Type 1 settling blanket settling

Type 111 settling discrete settling

Type 11 settling untreated primary sludge

Lateral treated secondary sludge

solids trunk sewer

Biosolids depressed sewer

Lateral main sewer

Inverted siphons

marine

Answer 1

• Glucose - Heterotrophs - The main source of energy for heterotrophs are carbohydrates, such as glucose.
• Carbon dioxide - Autotrophs - Carbon dioxide is reduced by autotrophs make organic compounds.
• Light - Phototrophs - Light is used to drive photosynthesis in phototrophs.
• Denitrification - Nitrate - Denitrification is a process where, nitrate is converted to free nitrogen by denitrification bacteria.
• Aerobic - Oxygen - Aerobic organisms utilize oxygen to respirate and produce energy.
• Anaerobic - Sulphate - Anaerobic microorganisms such as sulfur reducing bacteria use sulphate as a source of energy.
• Type I settling - Discrete settling - settling where, particles settle individually without interaction.
• Type III settling - Blanket sttling - Hindered settling, where some particles flocculate form blanket and settle.
• Type II settling - No matching definition. - In type II settling all particles flocculate and settle.
• Lateral - Trunk sewer - Lateral pipes connects to a trunk sewer, where they are primarily collected.
• Solids - Untreated primary sludge - In primary treatment solids that settle and float are removed.
• Biosolids - Treated secondary sludge - Biosolids such as flocs of biological growth are created and clarified.
• Lateral - Main sewer - lateral pipes from trunk sewer connect the main sewer.
• Inverted siphons - Depressed sewers - Inverted siphons are also called depressed sewers. They allow wastewater sewers to pass under rivers or any other obstructions.
• Marine - No matching definition.