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What is activated sludge ?...

What is activated sludge ?

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### Step-by-Step Solution 1. **Definition of Activated Sludge**: Activated sludge is a term used to describe a mixture of microorganisms, primarily bacteria and fungi, that are used in the treatment of sewage during the secondary treatment process. 2. **Sewage Treatment Overview**: The sewage treatment process consists of three main stages: - **Primary Treatment**: This involves physical processes such as screening, sedimentation, and filtration to remove large solids and debris from sewage, resulting in primary effluent. - **Secondary Treatment**: This stage involves biological processes where the primary effluent is treated with microorganisms to degrade organic matter. - **Tertiary Treatment**: This stage includes chemical processes to further purify the effluent. ...
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Similar Questions

Explore conceptually related problems

Read the following statements about activated sludge. a. It is the effluent passed from anaerobic digester to the settling tank. b. A small part of activated sludge is pumped into large tanks called anaerobic sludge digesters. c. A small part of activated sludge is pumped back Into the aeration tank to serve as inoculum. Which of the above statements are incorrect?

Which of the following is True/false A small part of activated sludge is pumped into large tank called anaerobic sludge digesters.

Knowledge Check

  • Study the given differences between primary sludge and activated sludge and select the incorrect ones. Primary Sludge Activated sludge (i) It is sludge formed during primary sewage treatment. It is sludge formed during secondary sewage treatment. (ii) It possesses flocs of decomposer microbes. It does not possess flocs of decomposer microbes. (iii) It does not require aeration. Formation of activated sludge requires aeration. (iv) A lot of decomposition occurs during formation of primary sludge. Very little decomposition occurs during formation of activated sludge.

    A
    (i) and (ii)
    B
    (ii) and (iv)
    C
    (i),(ii) and (iv)
    D
    (ii) and (iii)

    • Similar Questions

    Explore conceptually related problems

    Why a small part of activated sludge is pumped back into the aeration tank during sewage treatment?

    What is activated complex ? Discuss its formation and transformation .

    What is activated complex? How is it formed and transformed into product?

    What would happen if oxygen availability to activated sludge flocs is reduced ?

    Select the correct statement regarding activated sludge formed during secondary sewage treatment.

    Match column I with column II and select the correct answer from the given codes. {:(Column I,Column II),(A. "The stage in which of physical treatment of sewage is done",(i)"Anaerobic digestion activated sludge and production of biogas"),(B."The stage in which biological treatment of sewage is done",(ii)"Activated sludge"),(C."Name of the sediment in primary treatment",(iii)"Aeration tanks"),(D."It is carried to aeration tanks from primary",(iv)"Primary effluent"),(E."Name of the sediment in secondary treatment",(v)"Primary sludge"),(F."site of flocs growth",(vi)"Secondary treatment"),(G."Function of sludge digester",(vii)"Primary treatment"):}

    State True (T) or False (F) for the following statements. a. Anaerobic digestion of activated sludge produces biogas inside the sludge digester. b. Rhizobium is used as a biofertilizer for raising production of soyabean crop. c.Organic farming uses only naturally produced inputs like compost.

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