Environmental Engineering

Why is post-treatment necessary after the reverse osmosis process?

• To remove all remaining impurities and bacteria

• To make the water more acidic

• To remineralize the water and stabilize the acid/alkaline balance

• To increase the salinity of the water

What is the primary purpose of the high pressure used in the reverse osmosis process?

• To force feedwater through membranes that separate salt and impurities

• To increase the water temperature for faster desalination

• To reduce the acidity of the water

• To add minerals back into the water

During the pre-treatment stage, suspended solids and impurities are removed to prevent clogging of the __________.

Tags

NGSS.HS-ESS2-5

The second stage of desalination, called (a)   , uses increased ​ (b)   to force feedwater through membrane modules.

• reverse osmosis

• pressure

Which of the following is NOT a method to dispose brine water:

• Discharging directly into the sea

• Injection into deep saline aquifers

• Discharging into a sewage treatment plant

• Disposal in landfill after drying

• Releasing into freshwater lakes

What is the most important stage in the case of RO plants?

• Pre-treatment of feedwater

• Reverse osmosis

• Wastewater discharge

• Post - treatment

What are the two outputs of the reverse osmosis process?

• Toxic metals and freshwater

• Brine and potable water

• Saltwater and minerals

• Seaweed and chemicals

What is the primary goal of environmental engineering?

• To design sustainable systems that protect human health and the environment

• To develop new chemical compounds for industrial use

• To increase agricultural productivity

• To enhance the aesthetic value of urban areas

Tags

NGSS.HS-ESS3-4

NGSS.HS-ETS1-1

NGSS.HS-LS2-7

Which of the following is a common method used in environmental engineering to treat wastewater?

• Reverse osmosis

• Electroplating

• Cryogenic distillation

• Catalytic cracking

In environmental engineering, what is the purpose of using a bioreactor?

• To convert organic waste into energy through microbial processes

• To separate oil from water

• To increase the pH of acidic water

• To remove heavy metals from soil

Tags

NGSS.HS-ESS3-4

NGSS.HS-ETS1-3

NGSS.HS-LS2-7