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Table 3

Average statistics of the particle size distribution in activated sludge samples by DMIA method

Percentile (th)ED (μm)
WASRCSPTS
Minimum 0.98 0.98 0.98 
10 percentile 1.18 1.18 1.18 
25 percentile 1.58 1.58 1.54 
Median 2.48 2.53 2.39 
Mean 5.46 4.80 4.12 
75 percentile 4.63 4.82 4.39 
90 percentile 9.93 10.24 8.80 
Maximum 167.25 135.17 86.73 
Total particles 22,319 44,824 92,426 
Percentile (th)ED (μm)
WASRCSPTS
Minimum 0.98 0.98 0.98 
10 percentile 1.18 1.18 1.18 
25 percentile 1.58 1.58 1.54 
Median 2.48 2.53 2.39 
Mean 5.46 4.80 4.12 
75 percentile 4.63 4.82 4.39 
90 percentile 9.93 10.24 8.80 
Maximum 167.25 135.17 86.73 
Total particles 22,319 44,824 92,426 

ED, equivalent diameter; WAS, waste activated sludge; RCS, recirculated sludge; PTS, pre-treated sludge.

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