GATE CE 2021 Set 1 — Question 38
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Environmental Engineering → Wastewater Quantity & Sewerage → Wastewater Characteristics
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Question
A sample of industrial wastewater is taken into a silica crucible. The empty weight of the crucible is . The crucible with the sample is dried in a hot air oven at till a constant weight of . Thereafter, the crucible with the dried sample is fired at for in a muffle furnace, and the weight of the crucible along with residue is determined as . The concentration of total volatile solids is ____________.
Correct answer
(C) 6920 mg/L
Solution
Total Volatile Solids (TVS) is the weight loss on ignition at .Weight of crucible + dried sample at () =
Weight of crucible + residue after firing at () = Weight of volatile solids = Volume of sample () = Concentration of TVS =
Weight of crucible + residue after firing at () = Weight of volatile solids = Volume of sample () = Concentration of TVS =
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