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Subject: Science, asked on 16/3/18

What is the difference between scum and sludge

Subject: Science, asked on 16/3/18

Explain sewage treatment

Subject: Science, asked on 16/3/18

Explain sewage

Subject: Science, asked on 10/3/18

What percentage of water in activated sludge?

Subject: Science, asked on 3/3/18

Which bacteria that decompose organic waste ?

Subject: Science, asked on 27/2/18

The pebbles are big it should be removed through bar screening not by grit and sand removal!!!! 
BTW in grit and sand removal grit and sand is not removed!!!

Subject: Science, asked on 26/2/18

Please give answer
Write one words for each of the following 
1. Dirty Water 
2. The chemical process of wastewater treatment plant
3. Wastewater that contains suspended impurities
4. The material that settles at the bottom of sedimentation tanks 
5. Material that rises to the top in sedimentation tanks.

Subject: Science, asked on 19/2/18

How is wwtp water is cleaned

Subject: Science, asked on 15/2/18

It is dangerous to defecate in open. Why?

Subject: Science, asked on 14/1/18


Q. Name the types of impurities which are present in waste water with the help of example. 

Subject: Science, asked on 14/1/18

Q Name the types of impurities present in waste water with the help of example.

Subject: Science, asked on 14/1/18

Name the types of impurities which are present in waste water with the help of example?

Subject: Science, asked on 8/1/18

Sove it

QA. Objective type questions 
         Choose the correct option.

    Q1. Which one of these is a mechanical process of treating wastewater ?

           (a) Screening of wastes                             (b) Digestion of wastes

           (c) Disinfecting water                               (d) None of these

    Q2. Which of the following removes the largest impurities of sewage ?

           (a) Vertical bars                                         (b) Grit chamber 

           (c) Aeration tanks                                      (d) Sedimentation tanks

    Q3. Which one of these refers to the material that settles at the bottom in wastewater treatment ?

            (a) Sludge                                                  (b) Scum

            (c) Sewage                                                 (d) None of these

    Q4. In which one of these is air blown onto the sewage ?

            (a) Grit chambers                                        (b) Aeration tanks

            (c) water tank                                              (d) Septic tank

    Q5. Improper management of sewage results in 

            (a) diseases                                                  (b) contamination of water supply

            (c) water pollution                                       (d) all of these 
 

Subject: Science, asked on 8/1/18

Is phosphate a nutrient??
and it comes under inorganic component or organic components??

Subject: Science, asked on 5/1/18

Good sanitation practices yield good hygiene . Explain

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