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प्रश्न
Wastewater treatment generates a large quantity of sludge, which can be treated by ______.
विकल्प
anaerobic digesters
floc
chemicals
oxidation pond
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उत्तर
Wastewater treatment generates a large quantity of sludge, which can be treated by anaerobic digesters.
Explanation:
During wastewater treatment, the solid part that settles at the bottom is called sludge. This sludge is treated in anaerobic digesters, where microorganisms break down organic matter in the absence of oxygen, producing biogas (mainly methane) and reducing the volume of waste.
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संबंधित प्रश्न
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 20 mg/L, 8 mg/L and 400 mg/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?
Rearrange the names of tanks used in sewage treatment as per the flow of the procedure.
- Settling tank
- Grit Chamber
- Aeration tanks
- Primary sedimentation tank.
Due to which of the following reason/s sewage water cannot be discharged directly into river?
Identify the type of microorganisms involved in floe formation during sewage treatment.
Identify the INCORRECT statement with respect to sewage treatment.
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.
Which of the following is TRUE regarding 'Flocs'?
Nitrogen fixation by organisms requires conditions that are:
Methanogenic bacteria are not found in ______.
The primary treatment of waste water involves the removal of ______.
BOD of waste water is estimated by measuring the amount of ______.
Activated sludge should have the ability to settle quickly so that it can ______.
Why do we prefer to call secondary waste water treatment as biological treatment?
What is the group of bacteria found in both the rumen of cattle and shidge of sewage treatment?
Why is aerobic degradation more important than anaerobic degradation for the treatment of large volumes of waste waters rich in organic matter. Discuss.
Discuss about the major programs that the Ministry of Environment and Forests, Government of India, has initiated for saving major Indian rivers from pollution.
Given below is the flowchart of sewage treatment. Identify A, B, C, D and E and select the correct option.
After a significant reduction in the BOD of wastewater, it is passed into a settling tank where bacterial flocs are allowed to sediment. This sediment is called ______.
Explain the steps involved in preliminary treatment of sewage.
Removal of suspended, floating, coarse and solid particles in sewage treatment is called ______.
