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Table 1 Chemical composition of representative paper sludge (PS) ash [13]

From: Bioconversion of paper sludge to biofuel by simultaneous saccharification and fermentation using a cellulase of paper sludge origin and thermotolerant Saccharomyces cerevisiaeTJ14

Ash Composition (% w/w)
SiO2 35.7
TiO2 1.2
Al2O3 26
FeOa 0.4
MnO 0
MgO 8
CaO 25.7
Na2O 0.1
K2O 0.1
  1. aTotal iron as FeO.