An analysis for determination of solids in the return sludge of activated sludge process was done as follows: (1) A crucible was dried to a constant mass of 62.485 g. (2) 75 ml of a well-mixed sample was taken in the crucible. (3) The crucible with the sample was dried to a constant mass of 65.020 g in a drying oven at 104° C. The crucible with the dried sample was placed in a muffle furnace at 600°C for an hour. After cooling, the mass of the crucible with residues was 63:145 g. The concentration of organic fraction of solids present in the return sludge sample is

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An analysis for determination of solids in the return sludge of activated sludge
process was done as follows: (1) A crucible was dried to a constant mass of 62.485
g. (2) 75 ml of a well-mixed sample was taken in the crucible. (3) The crucible with
the sample was dried to a constant mass of 65.020 g in a drying oven at 104° C.
The crucible with the dried sample was placed in a muffle furnace at 600°C for an
hour. After cooling, the mass of the crucible with residues was 63:145 g. The
concentration of organic fraction of solids present in the return sludge sample is
Transcribed Image Text:An analysis for determination of solids in the return sludge of activated sludge process was done as follows: (1) A crucible was dried to a constant mass of 62.485 g. (2) 75 ml of a well-mixed sample was taken in the crucible. (3) The crucible with the sample was dried to a constant mass of 65.020 g in a drying oven at 104° C. The crucible with the dried sample was placed in a muffle furnace at 600°C for an hour. After cooling, the mass of the crucible with residues was 63:145 g. The concentration of organic fraction of solids present in the return sludge sample is
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