| Question | Answer |
|---|---|
| Sewage Pathogen leading to typhoid fever | Salmonella Typhi |
| Sewage Pathogen leading to cholera | Vibrio Cholerae |
| Sewage Pathogen leading to diarrhea | Escherichia Coli & Cryptosporidium Parvum |
| Sewage Pathogen leading to salmonellosis | Salmonella species |
| Sewage Pathogens leading to numerous parasitic diseases | roundworms and flatworms |
| Sewage Pathogen leading to dysentery | Shigella species (bacteria) Entamoeba histolytica (protozoan) |
| Preliminary treatment of sewage | Removal of debris and grit |
| Primary treatment of sewage | removal of particulate organic matter |
| Secondary Treatment of sewage | removal of colloidal and dissolved organic materials |
| Biological nutrient removal | removal of dissolved inorganic material |
| Major by product of anaeronic process during decomposition of sludge | The gaseous mix formed during absence of oxygen where bacteria feeds on detritus is known as biogas which consists of 60 percent methane (EPA 2013) |
