Due to climate change and population growth with increasing water needs, the use of wastewater for agricultural purposes may be particularly attractive since this may allow for the expansion of intensive agriculture while preserving limited resources of good quality water for the rapid urban growth. The use of treated wastewater in agriculture benefits human health, the environment and the economy.

Most of the wastewater could be used in different ways,after treatment, such as in irregation . Especially in arid regions.

If an appropriate wastewater treatment method is used, there is no fear of diseases. On the other hand, it is not necessary to use treated water for drinking purposes only, but it can also be used for agriculture, industry, and others.

Merci Hamid

Thank you Dear Ziad

Yes, but I prerfed if it used for agriculture purpoese

Due to scarcity of water, day by day, the need for reusing waste water after proper treatment is essential. This is the first step in the field of water conservation.

Dear Shno

yes, the treated wastewater is used mainly for irrigation in agriculture.

yes

natural waters are increasingly scarce in some countries. I'm talking about arid and semi arid countries. the treated wastewater must be used for irrigation in agriculture for these countries, which are poor in water.

Thank you Dear Joan, Dear Shno et Dear le Danois Ahmed for you comment.

The treated wastewater must be reused, since it is a significant quantity to be reinforced for irrigation.

Treated wastewater can be used for different purposes depending on the level of treatment received. It can be used for irrigation, construction, or reinjected into the drinking water distribution source to boost the volume. At whatever point, however, safety must be assured.

Thank you Dear Smaoune

Dear Macbeda Michael-Agwuoke

Thank you for your answer and comments.

what do you tell yourself by the wastewater reintroduced into the network or drinking water pipes?

If wastewater is intended to be reused for drinking. it must pass the drinking water standard of the country or municipality. The drinking water standards provide requirements for drinking water safety by specifying the:

• maximum amounts of substances or organisms or contaminants or residues that may be present in drinking-water
• criteria for demonstrating compliance with the Standards 
• remedial action to be taken in the event of non-compliance with the different aspects of the standards.

Therefore, it is normal to first treat the wastewater, passing through preliminary treatment, primary treatment, secondary treatment, and final treatment where the treated wastewater is disinfected. At this point, the water must have met the safety standard to qualify to discharge it into the dam, river, or stream which is supplying water to the drinking water treatment plant. Mostly chlorination and/or ultraviolet irradiation is used for disinfection purposes. By the time it passes through the drinking water treatment processes, it should be safe for drinking. Please note that treated wastewater is discharged into the dam, stream, or river.

It is a normal requirement to routinely monitor the total coliforms, and enumeration testing for E.coli and total coliforms to be certain that standards are maintained at all times before the water is distributed.

The treated wastewater must be reused in irrigation, especially the drip system.

yes, we need to reuse treated wastewater, because it is an additional water to irrigation.

Dear Macbeda Michael-Agwuoke

Thanks you for your answer and comments.

Best regards

If the treatment level is too high, it can be reused for irrigation or discharge to the sea.

Thanks you Dear Smaoune

Thanks you Dear Basem Mohammed Al-Sakkaf

But of course you have to treat the wastewater. Once treated, they must be rejected in nature. In arid areas, it is to replenish the lakes and Chott.

The Algerian experience begins to give these fruits. Missing birds are back in some Chott Sahara after being fed by treated wastewater.

Dear Boualem Remini

Thanks you for your answer and comments

It should be, it must be reused, but with extreem precotion despite after treatement.

Several green technics are available , but we need a global strategy to follow this field

The technology exists to "drink" treated wastewater, so it is a matter of getting and paying for the method to treat wastewater.

In the picture an environmental geology class is visiting the new Brandon wastewater plant and a student (with glasses) was asked to taste the cleaned up water for drinking. He thought it was very good. This plant is only about 100 m from a major Pig processing plant and the wastewater treatment was designed to clean the city water plus this plant's wastewater.

Dear Abdelhadi Ammari

Thanks you for your answer and comments

Dear Michael Issigonis

Thanks you for your answer and comments.

Humanity will have to (and they still do it) to increase the

turnover of used water and "renew" used water for technical

needs, since there is much less pure fresh water.

Thanks you Dear Terekh Alexandr M. for your answer and comments

many countries use treated wastewater with caution.

Ahmed Kettab Boualem Remini Rachid ZEGAIT ..

Dear Kouadri Saber

Thanks you for your answer and comments

To answer Saber. Yes it is a very interesting subject, but you have to be very careful. I think in Algeria the purification stations do not work with the 3rd phase because it is very expensive. So the water is not as clean as you think. It is for this reason that my proposal at this stage is to reject purified water in nature.

In particular, we can purify and reuse water that we pollute less. For example, sink and bath waters can be purified and reused with a separate system.

Treatment of wash basin and bathroom greywater with Chlorella variabilis and reusability

Best Regards.

Boualem Remini , i agree with you prof , this is way i use the word "fruitless trees" .

Thank you for all clarification sir .

I think it can be used appropriately

Thanks you Professeur Remini for your comments

Thank you Dear Kadriye Oktor for your answer

Thanks you Dear Kouadri for your comments

Dear Raya Al-Naimi

Thanks you.

Thanks you Dear Zegait for your comments

It should be noted that the reuse of treated wastewater is done in many countries around the world, particularly arid and semi-arid countries.

surface water, like groundwater, is a source of conflict in many regions and countries of the world. wastewater is not a source of conflict between countries. the waters of the nile that begin in Ethiopia and end in Egypt are a source of conflict because of the inequitable division between countries. So let's leave this topic aside and come back to the question I asked: WASTEWATER REUSE WORLDWIDE

here are websites for more information:

https://www.u-picardie.fr/beauchamp/duee/puil.htm

https://www.suezwaterhandbook.fr/eau-et-generalites/quelles-eaux-a-traiter-pourquoi/les-effluents-urbains/reutilisation-des-eaux-usees

Rachid ZEGAIT ..

Only for industrial use

Dear Ahmed Abd El Gawad

Thank you for your comment

Dear Ahmed Abd El Gawad

what about the reuse of treated wastewater for irrigation?

Indeed many studies have tried to promote reuse of wastewater in Irrigation. However, someone like me I would not be comfortable using vegetables from such farms because of heavy metals in waste water which can be in the vegetables.