Microorganisms In Greywater

. It was also revealed by NSW (2000) that there are a few variations in the sources of gray water in that bathroom (hand basin, shower, and bath) which generates about 38% of the household wastewater flow (55% of greywater) and is considered to be the least contaminated type of greywater. Microbiologically, thermotolerant coliform concentrations have been assessed in shower and bath water to be in the range of 104 to 106 cfu/100mL. People often urinate in showers and baths concern is often expressed about the increased health aspects of inappropriate disposal. While urine in a healthy person is sterile, some bladder infections may pass microorganisms in urine. However, the potential for these organisms to survive and cause infection is considered remote. …show more content…
Wastewater from hand basins is more pollutant than bath or shower greywater. It was further revealed that soap is the most common chemical contaminant found in bathroom greywater and other common contaminants are from shampoo, hair dyes, toothpaste and cleaning chemicals. All of these contaminants are believed to adversely affect land applications systems and are difficult to remove from the wastewater. Biocidal soaps have little effect on reducing the bacterial load in greywater. Laundry grey water. NSW (2000) also suggested that laundry wastewater represents about 23% of household wastewater (34% of greywater). Greywater from the laundry improves in quality from wash water to first rinse water to second rinse water. Microbiologically, thermotolerant coliform loads varied from 107 cfu/100mL when nappies were washed to