can the treated water that comes from waste water treatment plant is suitable for human consumption 

Dear Student.
Please find below the solution to the asked query.

If the water is treated appropriately in 
four stages of waste water treatment, then it can be used as drinking purpose.

Waste water treatment consists of :-

1. Preliminary treatment:- At this stage the waste water is passed through a screen that removes all the solid waste like paper, plastic of cloth.
2. Primary stage:- After preliminary stage is over the water is send to the sedimentation tank where all the solid particles of organic materials are removed using gravity setting.
3. Secondary stage:- At this stage microorganisms are used to remove all dissolved and suspended organic material. This is known as a activated sludge process.
4. Tertiary stage:- At this stage chlorine is used for killing all pathogens present in the water.   

Hope this information will clear your doubts about the topic.
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Regards.

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no, but it can be used for industries, factories, agriculture etc.
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