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प्रश्न
One of the free-living anaerobic nitrogen-fixer is _________.
विकल्प
Azotobacter
Beijerinckia
Rhodospirillum
Rhizobium
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उत्तर
One of the free-living anaerobic nitrogen-fixer is Rhodospirillum.
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संबंधित प्रश्न
What is sewage?
Describe how do 'flocs' and 'activated sludge' help in Sewage Treatment.
Answer the following question.
What are 'flocs', formed during secondary treatment of sewage?
Removal of large pieces of floating debris, oily substances, etc. during sewage treatment is called _______________.
Into which of the following the sewage water is pumped after preliminary 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?
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 ______.
