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प्रश्न
Answer the following question.
What are ‘flocs’, formed during secondary treatment of sewage?
उत्तर
Flocs are masses of bacteria associated with fungal filaments and they are helpful in increasing the decomposition rate and they are put in the aeration tank while secondary sewage treatment is in process.
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संबंधित प्रश्न
Explain the function of “anaerobic sludge digester” in a sewage treatment plant.
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?
What is primary treatment of sewage?
Answer the following question.
What are 'flocs', formed during secondary treatment of sewage?
The purpose of biological treatment of waste water is to ______.
After which of the following process effluents from anaerobic sludge digesters are released in natural water bodies?
Which of the following occurs during secondary treatment?
BOD of waste water is estimated by measuring the amount of ______.
Given below is the flowchart of sewage treatment. Identify A, B, C, D and E and select the correct option.
Explain the steps involved in preliminary treatment of sewage.
