Advertisements
Advertisements
प्रश्न
Explain the steps involved in preliminary treatment of sewage.
Advertisements
उत्तर
- Screening: Sewage and waste water contain plenty of suspended, floating materials, coarse, and solid particles, along with dissolved substances. The suspended objects are filtered and removed. This is done in screening chambers. The sewage is passed through screens or net in the chambers. Larger suspended or floating objects are held in the screening chambers. These have to be removed before the biological treatment.
- Grit Chamber: After screening, the filtered sewage is then passed into a series of grit chambers. These chambers contain large stones (pebbles) and brick-ballast. Coarse particles settle down by gravity. Thus, passage of filtered sewage removes much of the coarse particulate matter.
APPEARS IN
संबंधित प्रश्न
Explain the different steps involved during primary treatment phase of sewage.
What are flocs with respect to sewage treatment?
The purpose of biological treatment of waste water is to ______.
Which of the following occurs during secondary treatment?
Identify the INCORRECT statement with respect to sewage treatment.
______ refers to the organic matter which settles down after physical treatment of sewage.
After which of the following treatment BOD of the effluent is significantly reduced?
What would happen if oxygen availability to activated sludge flocs is reduced?
Study the given diagram of the Sewage Treatment Plant (S.T.P.) and answer the question that follows:
- Which one of the two 'S.T.P.' (A) or (B) will be more effective in treating the human excreta in municipal waste?
- Write the steps followed in carrying the treatment of the sewage in step (Z), once the BOD of sewage is reduced significantly till it is passed on to the "anaerobic sludge digesters".
Given below is the flowchart of sewage treatment. Identify A, B, C, D and E and select the correct option.
