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प्रश्न
What is the key difference between primary and secondary sewage treatment?
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उत्तर
| Sr. No. |
Aspect |
Primary Sewage Treatment | Secondary Sewage Treatment |
| 1. | Nature of Process | Primary sewage treatment is a purely physical process of wastewater purification. | Secondary sewage treatment is a biological process driven by living microorganisms. |
| 2. | Target Material | This treatment focuses on removing floating debris and solid particles, such as grit. | This treatment focuses on degrading the dissolved organic matter in the water. |
| 3. | Mechanism | It achieves purification through sequential filtration and gravitational sedimentation. | It achieves purification using aerobic microbes that form mesh-like structures called flocs. |
| 4. | Impact on BOD | This stage causes little to no reduction in the Biochemical Oxygen Demand of sewage. | This stage significantly reduces the Biochemical Oxygen Demand of the effluent. |
APPEARS IN
संबंधित प्रश्न
Explain the different steps involved during primary treatment phase of sewage.
Answer the following question.
What are 'flocs', formed during secondary treatment of sewage?
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?
The purpose of biological treatment of waste water is to ______.
In which of the following microbial digestion of organic wastes of sewage takes place?
In the process of biogas production which of the following anaerobic bacteria are used?
Small part of activated sludge is passed back into ______ and major part is pumped into large tanks called ______.
Into which of the following the sewage water is pumped after preliminary 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.
After which of the following treatment BOD of the effluent is significantly reduced?
Which of the following process is a part of preliminary treatment of sewage?
Which of the following is TRUE regarding 'Flocs'?
During sewage, treatment biogas is produced wits which include:
Which of the following is put into Anaerobic sludge disaster for further sewage treatment?
Methanogenic bacteria are not found in ______.
In a sewage treatment plant, all of the following processes belong to secondary treatment except:
In which of the following step large and small particles are removed from sewage through sequential filtration and sedimentation?
What would happen if oxygen availability to activated sludge flocs is reduced?
In what way anaerobic sludge digestion is important in sewage treatments?
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 ______.
Removal of suspended, floating, coarse and solid particles in sewage treatment is called ______.
What is the major component of municipal wastewater (sewage)?
During primary sewage treatment, floating debris is separated by which physical process?
Which mixture of gases is collectively produced as biogas during anaerobic sludge digestion?
