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Civil - Environmental Engineering - Sewage Treatment

Important Question And Answer: Secondary Treatment Of Sewage

   Posted On :  10.07.2016 01:51 am

Civil - Environmental Engineering - Sewage Treatment

Important Question And Answer: Secondary Treatment Of Sewage

 

 

1.     Give any four advantages of activated sludge process?

 

           Lesser land area is required

 

           The head loss on the plant is quite low

 

           There is no fly ash or odour nuisance

 

           Capital cost is less

 

 

2.     What are the disadvantages of the activated sludge process?

 

        High cost of operation, tooth greater power consumption

 

        A lot of machinery to be handled

 

        The sudden change in the quantity and character of sewage may produce adverse effects on the working of the process thus producing inferior efficient

 

 

3.What are the types of track long filters?

 

 

        Conventional track long filter or ordinary or standard rate or low rate trick long filter

 

        High rate filters or high rate trick long filter

 

 

 

4.What are the disadvantages of trick long filters?

 

 

 

        The head loss through these filters is high, making automatic during of the filters necessary

 

        The cost of construction is high

 

                          There filters cannot treat ratio sewage and primary sedimentation is a must

 

5.What are the special types of filters?

 

       Durban filter

 

       Magnetic filters

 

       Rapid sand filters

 

 

6.What do you mean by magnetic filters?

 

 

In this type of filter, a layer of crashed magnetic ore of

 

Iron is provided in about 80mm, thickness, and is supported on a non-magnetic metal wire screen sewage is filtered through the magnetic layer which removes the impurities purely by mechanical starching action.

 

 

7.What are the types of high late Filters?

 

 

        Bio filters

 

        Accelo filters

 

        Aero filters

 

Tags : Civil - Environmental Engineering - Sewage Treatment
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