Waste Water Treatment Plant Primary Treatment
Waste Water Treatment Plant - Primary
Waste Water Treatment Plant Primary treatment:
This is a mechanical process which involves screening and setting of large particles. First, the sewage is passed through screens of vertical bars to remove larger impurities such as metal cans, plastic bags, cloth pieces etc. The wastewater is then passed through a grit and sand removal tank called the grit chamber. The speed of the incoming wastewater is reduced so that sand grit, pebbles, etc. settle down. The water is then passed through huge sedimentation tanks. Here solid wastes such as faeces is allowed to settle down and the light floatable waste such as soaps, oils, plastics, and grease rise.
Solid waste that settles at the bottom in the primary treatment of wastewater is called the sludge. Light waste that rises to the top and floats, during wastewater treatment is called the scum.
Which of the these is a part of the wastewater treatment plant? | |||
| Right Option : D | |||
| View Explanation | |||
In a filtration plant, water is filtered using layers of _____________, fine gravel and medium gravel | |||
| Right Option : D | |||
| View Explanation | |||
Which of the following should be provided in the case where aeration is absent? | |||
| Right Option : B | |||
| View Explanation | |||
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