It depends on the aim of your study. No general recipe here.

Thank you Dr. Xiangsheng Cao

I want to investigate the removal of some targeted micropollutants from secondary treated effluent using MBR. I have no possibility to work on a real effluent. Do you have any idea?

I would advice you to look at the work by Cynthia Alcantara and Raul Munos who created synthetic waste water for their studies.

You have to decide which element you are going to remove and make a solution base reference to the wish concentration.

To Emma Nehrenheim 

Hello, thank you for your reply. I could not find the paper published by Cynthia Alcantara and Raul Munos. Could it be possible for you to give me the name of paper?

Best Regards

To Dr. Seyed Hadi --- Khatami 

Thank you so much for your response. Do you have any experience to make a secondary-treated effluent? If yes, could you please give me the name of paper? I have seen lots of papers which used a real effluent but no none has made a synthetic effluent.

Best Regards

No I have experience to prepare for make control the  BOD set.

The nature of the effluent is driven by what goes into the plant. A purely domestic plant's effluent characteristic mirrors the cultural tastes of the region. Where high salt and oil and grease predominate the diet, then the same will be true for the effluent. Obviously a vegatarian culture will be different from a meat and potatoes culture. With that said, a Dogpile.com search should be able to provide you with references on the basic characteristic of a generic effluent. Keep in mind also that different treatment systems produce different effluent characteristics. Some systems do better nitrogen removal, or phosphourus removal.

Now to complicate matters, industrial and commericial users may also discharge to a public treatment plant and there you can get a whole host of organic and inorganic chemicals that may pass through the treatment train, e.g. metals, chlorinated compounts, phenols, platicizers, and metals to list a few.

Chlorides, sulphates, nitrogen compounds likeTKN, nitrates, and ammonia, sodium,  lead, copper, fats .oils and grease, BOD constituants, and TSS; are a few items are in the effluent in some proportion.

I suggest you contact a few treatment plants in your study area and ask for any analytical analyis that has recently been conducted at the plant. I assume the plant is permited to discharge and the provincial or national environmental regulations require this analysis as part of there discharge permit conditions.

In general, it is hard to simulate the secondary effluent which contains a broad range of chemicals. Quite often people use diluted OECD synthetic wastewater: TOC and TN around 10-20 mg/L but it dose not includes the recalcitrant organics like humic substance. And you may also need to add more proteins and less ammonium.

Salam.....It depends on the aim of your study and your type of treatment that you will consider. No general recipe here.

but see the attached file

This is closely related to the way you prepare synthetic sewage.  In our studies, we have used peptone/meat extract mixture + standard nutrient solutions on numerous occasions, and I might say, quite successfully. This mixture  has the same COD fractionation and biodegradation characteristics with sewage. (kindly check our latest publications between 21010-2015). 

For simulating a secondary effluent, all you have to do is to use the same combination, but adjust the COD to what you would expect from a secondary effluent, say 40-50 mg/L COD.

Hello,

 For synthetic wastewater,the wastewater constituents need to be represented, including degradable compounds, complex carbohydrates, and organic nitrogen. The synthetic wastewater could comprise glucose as the main organic constituent, plus balanced nutrients such as urea as nitrogen source and KH2PO4, K2HPO4 as phosphorus sources. Then you need to calculate the ratio of C:N:P of these compound 

http://modeleau.fsg.ulaval.ca/fileadmin/modeleau/documents/Publications/pvr334.pdf

Read this online report you can find some prepared synthetic wastewater that can lead u.Thx

Hello!

Since it is treated wastewater it will have negligible readily biodegradable matter. The secondary treated wastewater if has high COD/BOD5 ratio then there is presence of non biodegradable/refractory substances which can be removed only by advanced processes.

Here you find an article (Alcantara et al. 2015) with the composition of SSW:

Article Nitrous oxide emissions from high rate algal ponds treating ...

Thanks a lot dear Lorenza