lect 22

Question 1

what is the is the overview of this lecture?

Answer 1

complete water treatment and discussion of partition equilibria

Question 2

what is natural water purification processes?

Answer 2

soil is a natural filter for wastes and wastewater. Physical, chemical, biological characteristics of soil enable waste water treatment
-detoxification
-biodegradation
-chemical decomposition
-physical and chemical fixation

bacteria, actinomycetes, and fungi in biodegradation. Industrial wastewater treatment by soil
-acclimated microorganisms
-very effective for petroleum wastes (limited to flora of soil)

Question 3

what is green water?

Answer 3

much of the world suffers from water deficiency. water may be available from desalination of sea water or brackish groundwater
-70% of Saudi Arabia’s water (use reverse osmosis, needs lots of energy for pressure to push water)
-multistage flash evaporation (put water into vapor instead of liquid, need less energy)
-reverse osmosis

water reuse and recycling
-recycling before water is every discharged
-reuse when another consumer uses discharge water

current major systems for water reuse
-irrigation
-cooling water
-groundwater recharge

Question 4

what is a current system for water reuse?

Answer 4

Question 5

Answer 5