Câu hỏi về hệ thống xử lý nước thải

What is the main role of plants in wetland areas in wastewater treatment?

• They remove solid waste.

• Their roots filter out pollutants and host microorganisms that decompose pollutants.

• They only absorb heavy metals.

• They prevent water evaporation.

Which type of wastewater is easier to treat using nature-based solutions: gray water or black water?

• Gray water

• Black water

• Both are equally difficult to treat

• Neither can be treated

What is an artificial wetland system?

• A natural wetland area that filters water.

• A system that uses wetland plants and gravel to filter wastewater.

• A machine that treats wastewater with chemicals.

• A system that uses underground tanks and has no plants.

Why is it important to prevent root intrusion in gray water systems?

• Roots can damage pipes and reduce system efficiency.

• Roots help filter out pollutants.

• Roots absorb too much water, leaving plants dry.

• Roots do not harm the system.

What is the role of the anaerobic tank in the Living Machine system?

• It provides oxygen to the water.

• It removes all bacteria from the water.

• It digests organic material without the need for oxygen.

• It holds solid waste at the surface.

Which of the following is NOT a benefit of artificial wetlands?

• They improve water quality by filtering pollutants.

• They support diverse aquatic life and biodiversity.

• They produce more greenhouse gases than conventional systems.

• They stabilize stream banks and reduce erosion.

What is a key requirement for successfully implementing gray water recycling systems?

• Keep the system exposed to air.

• Use biocompatible cleaning products such as biodegradable soap.

• Only use plastic pipes.

• Ensure shallow groundwater levels.

What is the main benefit of Living Machines in treating black water?

• They have very little technology.

• They provide design flexibility for modular expansion.

• They only rely on gravity to operate.

• They can only treat gray water, not black water.

What is a challenge related to the use of artificial wetlands for wastewater treatment?

• They are too expensive to build.

• They require specialized knowledge to maintain.

• They are vulnerable to climate change and sensitive to plant species.

• They can only be used in industrial settings.

What is the main difference between gray water and black water treatment methods?

• Gray water is less contaminated and can be treated with simpler systems.

• Black water is cleaner and easier to treat.

• Treating black water does not require living plants.

• Gray water cannot be treated with nature-based systems.