Question
Domestic sewage in large cities:
is processed by aerobic and then anaerobic bacteria in the secondary treatment in Sewage Treatment Plant (STPs)
when treated in STPs, does not require the aeration step as the sewage contains adequate oxygen
has very high amounts of suspended solids and dissolved salts
has a high BOD as it contains both aerobic and anaerobic bacteria
Secondary treatment (Biological treatment) of sewage involves two main stages involving microbes. First, the primary effluent is passed into large aeration tanks where vigorous growth of useful aerobic microbes (flocs) consumes the major part of the organic matter. Subsequently, the sediment (activated sludge) is pumped into anaerobic sludge digesters, where anaerobic bacteria digest the bacteria and fungi in the sludge , .
This question aligns with the NEET BIOLOGY syllabus, specifically targeting concepts from Microbes in Human Welfare. Mastering this topic is crucial for scoring well in the upcoming medical entrance examinations. Solving conceptually related problems will help you understand the nuances of these concepts and improve your problem-solving speed.
More Microbes in Human Welfare Questions
Which one of the following helps in absorption of phosphorus from the soil by plants?
Monascus purpureus is the yeast used commercially in the production of:
Which one of the following is a wrong matching of a microbe and its industrial product, while the remaining three are correct?
Match the following list of microbes with the products/functions they are used for: Column I A. Saccharomyces cerevisiae B. Monascus purpureus C. Trichoderma polysporum D. Propionibacterium sharmanii Column II 1. Production of immunosuppressive agents 2. Ripening of Swiss cheese (Large holes) 3. Commercial production of ethanol 4. Blood cholesterol lowering agents
Which of the following statements about methanogens is not correct?
Match the following organisms with the products they produce: Column I (a) Aspergillus niger (b) Acetobacter aceti (c) Clostridium butyricum (d) Lactobacillus Column II (i) Ethanol (ii) Citric acid (iii) Lactic acid (iv) Acetic acid (v) Butyric acid
Match List-I with List-II: List-I A. Saccharomyces cerevisiae B. Aspergillus niger C. Trichoderma polysporum D. Clostridium butylicum List-II I. Citric acid II. Butyric acid III. Ethanol IV. Cyclosporin-A
During sewage treatment, biogases are produced which include:
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