ES 101 - Biological- Wastewater

What is the primary purpose of biological treatment in wastewater management?

• A) To remove solid waste

• B) To neutralize chemical toxins

• C) To reduce organic matter through microbial activity

• D) To desalinate water

1. Which type of microorganisms are primarily used in the biological treatment of wastewater?

• 1. A) Algae

• 1. B) Bacteria

• 1. C) Protozoa

• 1. D) Fungi

1. What is the process called where microorganisms break down organic matter in the absence of oxygen?

• 1. A) Aerobic digestion

• 1. B) Anaerobic digestion

• 1. C) Composting

• 1. D) Oxidation

1. In wastewater treatment, activated sludge is mainly used for:

• 1. A) Removing heavy metals

• 1. B) Breaking down organic matter aerobically

• 1. C) Filtering large debris

• 1. D) Disinfecting water

1. What role do nitrifying bacteria play in the biological treatment of wastewater?

• 1. A) They convert ammonia into nitrates

• 1. B) They decompose organic waste

• 1. C) They remove phosphates

• 1. D) They disinfect water

1. Which of the following is not a step in the biological treatment of wastewater?

• 1. A) Sedimentation

• 1. B) Chlorination

• 1. C) Aeration

• 1. D) Sludge digestion

1. Biological nutrient removal (BNR) in wastewater treatment primarily targets which nutrients?

• 1. A) Carbon and Nitrogen

• 1. B) Nitrogen and Phosphorus

• 1. C) Phosphorus and Carbon

• 1. D) Nitrogen and Sulfur

1. Trickling filters used in wastewater treatment are designed to:

• 1. A) Remove toxic chemicals

• 1. B) Facilitate aerobic decomposition of organic matter

• 1. C) Filter out solid waste

• 1. D) Reduce water turbidity