yes,it is harmful   Sewage ...

yes,it is harmful

 

Sewage is the mix of water and whatever wastes from domestic and industrial life are flushed into the sewer. To retrieve the precious water, the sewage is then “treated,” that is, “cleaned,” in what are called “treatment plants.”  The ideal of the treatment plant is to take out of the sewer water all the “wastes” that sewering put into it.  The water is “cleaned” in the degree to which the pollutants which had turned the water into sewage are removed by treatment-primary, secondary, or tertiary-and concentrated in the sludge. Please note that, though the aim of sewage treatment is to produce clean water, it is never to produce “clean” sludge.  Indeed, the “dirtier” the sludge-the more complete its concentration of the noxious wastes-the more the treatment has done its job. Sewage sludge contains everything the sewage treatment plant was able to remove from the sewage - plus every new chemical and pathogen formed in the mad synergy of this chemical soup, including virulent, antibiotic-resistant bacteria created through horizontal gene transfer.