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6Dec19 morning Q37

0. Major Sources of oxygen demanding waste in fresh water systems are
A. Agricultural run-off
B. Food Processing
C. Ore Mining
D. Sewage effluent
E. Landfill sites
Choose the correct options from these given below:

  • Option : C
  • Explanation :
    Oxygen-demanding wastes are the second category of water pollutants. These are the wastes that can be decomposed by oxygen requiring bacteria. Oxygen Demanding Wastes Come from sewage, animal feedlots, food processing facilities, pulp mills, runoff from farmlands, and dumping of wastes into streams.
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