Advertisements
Advertisements
प्रश्न
Why are flocs important in biological treatment of waste water?
Advertisements
उत्तर
Flocs are masses of bacteria associated with fungal filaments to form mesh-like structure. Flocs digest most of the organic material from the sludge. Thus, floc helps in reducing the BOD (Biochemical Oxygen Demand) of the effluent. This helps in the further treatment of sludge.
APPEARS IN
संबंधित प्रश्न
Distinguish between the roles of flocs and anaerobic sludge digesters in sewage treatments.
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?
One of the free-living anaerobic nitrogen-fixer is _________.
Name the tank to which the sewage water is passed after the preliminary treatment?
Which of the following is/are found in discharge from industrial waste?
Which of the following occurs during secondary treatment?
Identify the type of microorganisms involved in floe formation during sewage treatment.
What happens during the course of sewage decomposition?
______ refers to the organic matter which settles down after physical treatment of sewage.
Which of the following process is a part of preliminary treatment of sewage?
Which of the following is TRUE regarding 'Flocs'?
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:
What would happen if oxygen availability to activated sludge flocs is reduced?
Which one is wrongly matched?
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 ______.
Biochemical Oxygen Demand (BOD) serves as an indirect measure of which water quality parameter?
Which mixture of gases is collectively produced as biogas during anaerobic sludge digestion?
