There are at numerous previous RG questions on this.

• https://www.researchgate.net/post/How_I_can_simulate_Full-scale_WWTP_RBC2
• https://www.researchgate.net/post/How_to_prepare_synthetic_waste_water2
• https://www.researchgate.net/post/How_can_we_make_synthetic_waste-water_with_the_quality_of_secondary_treated_effluent_of_a_municipal_treatment_plant
• https://www.researchgate.net/post/Artificial_Wastewater_recipe_for_microalgae_experiment

A recipe that is easy to get standardised reagents for and is accepted by reviewers without too much discussion is the "OECD synthetic sewage" described in the OECD GUIDELINES FOR THE TESTING OF CHEMICALS:

http://www.oecd.org/chemicalsafety/testing/43735667.pdf

In domestic wastewater, what could be possibly present? If you can figure it out, then you will be able to synthesize it. For example it essentially contains soap ingredients, detergents, personal care products, cooking oils, any pharmaceuticals components, if somebody is using medicines etc. Further, if you want to synthesize it, first you need to get a sample from municipal treatment facility and get it's analysis, to know the composition of it. Later on, you can prepare wastewater by using, cooking oils, personal care products, soaps and detergents. I hope, I answered the question.

The composition depends on location.

Check this two papers. In the conclusion section you can find a "good practice" for the research on wastewater treatment. Some of them are useful for your topic.

Article Wastewater treatment by means of Advanced Oxidation Processe...

Article Wastewater treatment by means of advanced oxidation processe...

regards,

G