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Table 3

Characteristics of excess sludge and its supernatant after disintegration

 Volumetric energy – EV(UT) (kWh m−3)
Parameter102050100
Sludge CST s 259.70 276.75 385.50 843.73 
pH  6.72 6.62 6.70 6.84 
Supernatant FCODUT mgO2·L−1 862.01 1,102.00 2,199.02 4,930.09 
SCODUT mgO2·L−1 494.00 539.97 1,131.01 1,415.00 
VFAsUT as CH3COOH mg·L−1 42.80 42.20 72.51 304.00 
TNUT mgN·L−1 48.20 53.20 127.61 254.00 
 Volumetric energy – EV(UT) (kWh m−3)
Parameter102050100
Sludge CST s 259.70 276.75 385.50 843.73 
pH  6.72 6.62 6.70 6.84 
Supernatant FCODUT mgO2·L−1 862.01 1,102.00 2,199.02 4,930.09 
SCODUT mgO2·L−1 494.00 539.97 1,131.01 1,415.00 
VFAsUT as CH3COOH mg·L−1 42.80 42.20 72.51 304.00 
TNUT mgN·L−1 48.20 53.20 127.61 254.00 
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