The results of this study revealed the contribution of different wastewater fractions to the total toxicity of organic xenobiotics in raw and treated wastewater of the municipal STP Trier.
This work also fills the research gap of previous studies by identifying the contribution of different wastewater streams, which would serve as a good reference for source-separating sanitation system design.
Indeed, the contribution of the wastewater treatment (WWT) section to the facility-dependent cost was the most significant, followed by the pretreatment section.
PC 2 represents the contribution of domestic wastewaters and leaching of soil contaminant in the study area.
PC1 can thus be interpreted as including a mineral component of the river water, contribution of domestic wastewaters and organic matter in the study area.
Cluster 3 comprises Ni, total Cr, Mn, Cu and total Fe and represents the contribution of industrial wastewaters from major textile factories upstream, domestic wastes, pesticides and herbicides and fishing activities in the study area.
Plant species carry out a series of important biological, chemical and physical processes within a constructed wetland wastewater treatment system and make a significant contribution to wastewater purification.
The physico-chemical and microbiological characteristics of the water course had not changed appreciably with respect to previous determinations, thus emphasizing the major contribution of untreated urban wastewater to the overall pollution of the river.
In developing countries, the contribution of sewage and wastewater as point sources, as well as animal raising without adequate outlet control, represent extra loads for aquatic systems, the majority of these without treatment, used subsequently for irrigation, and not taken into account as potential risks.
