SVN3M - Liquid Waste Review

What is the system where the sewage and the rain water in the drains mix together and flow into water systems

• Primary sewage treatment

• Combined sewage overflow

• Storm water pipes

• Surface water sewage system

During secondary treatment in the aeration tanks, what is working on the sewage waste?

• micro-organisms

• humans

• air titration

• oxidation/reduction

What are two things that water treatment plants need to do?

• Clean and disinfect the water

• Boil and evaporate the water

• Remove the animals and plants

• Add chemicals and remove pesticides

This picture shows....

• irrigation

• aeration

• chlorination

• filtering

What is removed in primary phase wastewater treatment, as the wastewater is sent to a settling tank and left undisturbed?

• bacteria

• pathogens

• sludge

• plastic bags and other big non-biodegradable garbage

In a wastewater treatment plant, what gas must be maintained at precise levels in the aeration tank?

• CO₂

• O₂

• H₂

• CO

Certain types of bacteria are beneficial to wastewater treatment because

• they naturally break down organic matter

• they help solid material to settle out of the wastewater

• the nutrients produced are beneficial to the treated water

• they aren't beneficial

A series of underground pipes that carry used water to a treatment plant is called what?

• Filtration system

• Sewer system

• Septic System

• Drainage system

What is the first step in the water treatment process?

• coagulation
• filtration
• flocs
• concentation

Tags

NGSS.MS-ESS3-3

A healthy water system would have a pH of what?

• 0-2

• 4-7

• 6-8

• 10-12