flotables

This is the correct answer. Leaves are a type of organic matter, which is a common floatable.

This is incorrect. Plastic bottles are a common type of floatable.

This is the correct answer. Gravel is denser than water and would sink, not float.

This is incorrect. Feathers are a type of animal waste, which can float.

This is incorrect. Flotables often make the water cloudy and reduce clarity.

This is the correct answer. Flotables can obstruct pumps, screens, and filters.

This is incorrect. While flotables can contain nutrients, their primary problem is physical obstruction.

This is incorrect. Flotables can harbor pathogens and hinder disinfection.

This is incorrect. Screening is a widely used method for removing large debris.

This is the correct answer. Sedimentation is used to remove heavier particles that settle at the bottom.

This is incorrect. Skimming is used to collect floatable materials from the surface.

This is incorrect. Flotation uses air to bring flotables to the surface for removal.

This is incorrect. Flotables often contribute to unpleasant odors.

This is incorrect. Flotables make the water cloudy and reduce clarity.

This is incorrect. Flotables can harbor pathogens and increase disease risk.

This is the correct answer. Flotables can make the water visually unpleasant.

This is incorrect. While aesthetics are important, the primary goal is to protect public health and the environment.

This is the correct answer. Flotables can clog equipment and hinder treatment effectiveness.

This is incorrect. While floatable removal can improve efficiency, its primary goal is not cost reduction.

This is incorrect. Flotables do not directly affect the taste of water.

Here are some possible solutions:

Potential Floatable Materials:

1. Plastic sheeting/wrap: Commonly used in construction, this material can clog screens and filters, reducing treatment efficiency. It can also pose a risk to aquatic life if it ends up in waterways.
2. Wood scraps: These can clog screens and filters, and their decomposition can contribute to unpleasant odors and oxygen depletion in the wastewater.
3. Metal scraps: These can damage treatment equipment and potentially leach heavy metals into the wastewater, posing a risk to public health and the environment.

Negative Impacts on Treatment:

• Clogging: All these materials can clog pumps, screens, and filters, reducing treatment efficiency.
• Environmental Impact: These materials can pollute waterways, harming aquatic life and ecosystems.

Practical Solution:

• Proper Waste Disposal: The construction site could implement a strict policy for waste disposal, including designated bins for different types of materials and regular inspections to ensure proper disposal. This could also involve educating workers about the importance of proper waste disposal and the potential environmental consequences of improper practices.