As shown in Figure 3, at 0.25MPa, the decrease in the final moisture content of the sludge is due to the addition of different additives. For a single additive, its water content decreases with the increase of pressure, and it decreases by about 2 to 3%. This is due to increased pressure, not because of the use of different additives, is it possible to think that after the addition of additives, the decline in moisture content is not related to the additive, but is related to pressure. So the article said that the water content of 9% decline is not all the reason for adding additives?
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