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Mr. Dubey • 52.74K Points
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Q. The BOD after the filtration of sewage from the low rate trickling filter is

(A) 40-50%
(B) 80-90%
(C) 70-80%
(D) 90-99%
  • Correct Answer - Option(B)
  • Views: 965
  • Filed under category Environmental Engineering
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