Sources of Wastewater Generation

SOURCES OF WASTEWATER GENERATION

Domestic Sources

❖ Human waste from lavatories (feces, urine, flush water); known as black water

❖ Washing water (personal, clothes, floors, dishes, etc.), known as greywater or sullage

❖ Discharge from Septic tank

❖ Cooking oil, Pesticides, Lubricating oil, Paint, Cleaning liquids, etc.

Industrial Sources

❖ Industrial process waters (Dyeing industries, Tanneries etc)

❖ Industrial cooling waters (heat)

❖ Organic or biodegradable waste

❖ Organic or non bio-degradable/difficult-to-treat waste (pharmaceutical or pesticide manufacturing)

❖ Extreme pH waste (from acid/alkali manufacturing, metal plating)

❖ Toxic waste (metal plating, cyanide production, pesticide manufacturing, etc.)

❖ Solids and emulsions (paper manufacturing, foodstuffs, lubricating and hydraulic oil manufacturing, etc.)

❖ Waste water from oil & natural gas production

Rainfall collected on roofs, yards, roads, carparks, pavements etc; known as storm runoff

Workshops and garages (gasoline/petrol/diesel or rubber residues, soap scum, metals from vehicle exhausts, etc.)

Discharge from Sewage Treatment Plant (STP)

Groundwater infiltration into sewers

❖ Seawater ingress (salt and microbes)

❖ Agricultural drainage