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Essay On Domestic Waste Water

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ACE1X02: WATER TECHNOLOGY PROJECT 1

Name: Lee YunXi Admin No.: 1402872D Class: T04 Treatment of Domestic Waste Water

Major Contaminants of waste water

Domestic waste water is water that has been used by humans for domestic purposes including, but not limited to drinking, washing of clothes and bathing. These usages of water cause the water to be contaminated.
Some of the Major contaminants of waste water are:
• Human Faecal Matter and Urine
• Pathogens such as viruses, bacteria and protozoa
• Total dissolved Solids
Human faecal matter and urine in waste water is unavoidable as all humans have to excrete bodily waste. Faecal matter …show more content…

When constructed properly, this method of treatment can be extremely efficient in removing biodegradable organics and nitrogen from the waste water.

Advanced Treatment/Disinfection Last but not least, the water reaches the last stage of treatment where pathogens and other microorganisms that cause diseases in humans are killed. There are 3 different methods in this process with chlorine being the most commonly used.

• Chlorine
Chlorine is introduced into water as either a gas, liquid or solid. Chlorine is able to kill pathogens and microorganisms by destroying their cellular structure. However, one disadvantage of this method is that residual chlorine in water is harmful to useful aquatic life.
• Ozone
In this method, ozone is produced by exposing oxygen to high voltages. Ozone is very effective when killing pathogens and it decomposes back to oxygen. However, one disadvantage of this method is that it uses a lot of energy which translates to a higher

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