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प्रश्न
What are flocs with respect to sewage treatment?
What are flocs?
उत्तर
Flocs are the masses of bacteria held together by slime and fungal hyphae to form mesh like masses.
संबंधित प्रश्न
Explain the different steps involved during primary treatment phase of sewage.
What is sewage? In which way can sewage be harmful to us?
What is the key difference between primary and secondary sewage treatment?
Three water samples namely river water, untreated sewage water and secondary effluent discharged from a sewage treatment plant were subjected to BOD test. The samples were labelled A, B and C; but the laboratory attendant did not note which was which. The BOD values of the three samples A, B and C were recorded as 20mg/L, 8mg/L and 400mg/L, respectively. Which sample of the water is most polluted? Can you assign the correct label to each assuming the river water is relatively clean?
Answer the following question.
What are ‘flocs’, formed during secondary treatment of sewage?
Answer the following question.
Secondary treatment of the sewage is also called Biological treatment. Justify this statement and explain the process.
Name the chamber in which the suspended objects are filtered and removed during sewage treatment?
Name the tank to which the sewage water is passed after the preliminary treatment?
Due to which of the following reason/s sewage water cannot be discharged directly into river?
Which of the following occurs during secondary treatment?
Identify the INCORRECT statement with respect to sewage treatment.
During tertiary treatment, the bacterial floes sediment in the sedimentation tank, this sediment is called ____________.
Study the following statements regarding tertiary treatment of sewage and choose the correct option.
i. It produces methane gas.
ii. The effluents formed from these plants undergo chlorination.
iii. BOD is significantly increased at this step.
iv. It includes screening and passage of effluent through grit chamber.
Nitrogen fixation by organisms requires conditions that are:
In a sewage treatment plant, all of the following processes belong to secondary treatment except:
BOD of waste water is estimated by measuring the amount of ______.
Why do we prefer to call secondary waste water treatment as biological treatment?
Why is aerobic degradation more important than anaerobic degradation for the treatment of large volumes of waste waters rich in organic matter. Discuss.
