Wastewater : On average, each person produces about 200 litres of wastewater or sewerage, which is made up of 99.7% water, every day and comes from homes, industry, business, schools, hospitals and the community.
Greywater: Water that comes from the shower, bathroom and laundry which also contains soap and detergents and anything else that washes off including fat and grease. Greywater can be recycled for use on gardens however this must comply with local authority regulations.
Blackwater: Comes from the toilet - it is made up of faeces, urine, toilet paper and whatever else people put down the toilet.
Sludge - the solid by product from waste water treatment and sewerage ponds over time the solid components settle to the bottom whilst water evaporates from the surface. Water makes up 80% of sludge and the removal of water is a key to be able to produce a useable product, ie biosolids for fertilizers and other products.
Biosolids - treated sewage sludge which is produced as a result of wastewater treatment process.
Further definitions of terminology associated with biosolids