IJSRP, Volume 11, Issue 4, April 2021 Edition [ISSN 2250-3153]
Household wastewater generally consists of gray water and black water. Gray water or used water comes from used water in households, such as water used for bathing, washing, cleaning the house, and so on; while black water comes from excreta which has been mixed with toilet rinse water. Domestic wastewater, both gray water and black water, contains pollutants, both physical, chemical and biological pollutans. Physical pollutants, including suspended solids (TSS), clarity, odor and color; chemical pollutants, including pH, BOD, COD, NH3-N and fat; and biological or microbiological pollutant is Total Coliform.