UNIT 10

Front

Liquid waste

Back

Any waste that exists in liquid form (grease, oil, sludges, wash water, waste detergents and dirty water)

Front

Solid waste

Back

Discarded items like metals, furniture, and organic waste that can be recycled. There are five major types: glass and ceramic; plastic waste; paper rubbish; metals and tins; organic waste.

Front

Organic waste

Back

Rotten meat, garden, and food waste; Dispose it in a green bin; decompose and turn into manure by the action of microorganisms

Front

Hazardous waste

Back

Flammable, corrosive, toxic and reactive materials, threat to the environment

Front

Recyclable waste

Back

Garbage, sludge, and refuse; put them in recycle bin; if not sure, check the item's packaging

Front

Raw sewage

Back

Untreated wastewater that contains human waste, household and industrial wastewater, and other pollutants that enter the sewer system

Front

Screens

Back

Mechanical devices used to remove large solid materials such as plastics, sticks, rags, and other debris from the raw sewage

Front

Comminutor

Back

A mechanical device that grinds and shreds the screened sewage to break down any larger solid materials into smaller pieces

Front

Grit chamber

Back

A tank that allows the flow of sewage to slow down so that heavier materials such as sand, gravel, and other grit can settle to the bottom for removal

Front

Primary clarifier

Back

A large tank where the flow of sewage is slowed down so that solid materials can settle to the bottom and oils and grease can rise to the top, creating a sludge layer and a scum layer