Wastewater is water that has been previously used. It often contains contaminants, depending on what is was used for.
Wastewater is either:
Domestic or sanitary:This comes from residences from sinks, showers and baths, toilets and laundries. It can contain body waste or detergents and residual body oils.
Industrial: This is discharged by commercial businesses and manufacturing procedures.
Industrial Contaminants Contributing to Wastewater
Many industries produce wastewater which contains residual acids, plating metals, and toxic chemicals.
The type of contaminants varies between industries. Below is a breakdown of some of the more common industries and their contaminants or pollutants.
Textiles and leather
Sulfates, chromium, BOD, and solids
Pulp and paper
Chlorinated organic compounds, BOD, COD and solids
Iron and steel
BOD, COD, oil, metals, acids, phenols, and cyanide
Petrochemicals and refineries
BOD, COD, mineral oils, chromium and phenols
COD, heavy metals, organic chemicals, cyanide, and SS
SS and Fluorine
Acids, salts, SS and metals
COD and organic chemicals
Industrial wastewater is usually either inorganic or organic. Inorganic industrial wastewater is mainly produced in enterprises that process metals, in non-metal minerals businesses and in coal and steel businesses.
Organic industrial wastewater on the other hand contains organic waste from those chemical industries that primarily use organic products to produce chemical reactions. These include leather factories, textile manufacturers, paper manufacturers and oil refining companies.
Wastewater can be treated at effluent treatment plantsto remove contaminants. This process allows the water to become fit for recycling or going back into the environment by way of our rivers, oceans or into groundwater under the land’s surface for reuse.
Properly treating wastewater with an industrial wastewater treatment will benefit the health of our community, our businesses, finances and our environment.