Abstract: The absorption decollrization prop erties of enzymatic hydrolysis of xylo -oligosccharide solution on freshcalciumphosphateprecipytate(FCPP)wereexperimentallystudied.Theexperimentalresults indicatedthat the absorption ratio of coloring matters was larger than that of xylo -oilgosaccharide on FCPP,and the absorp tion ratio of xylo -oligodaccharide rais ed with the calciumhydrogen dosage.The absorption ratio of coloring matters reached 87.1%and the absorption loss of xylo -oligosaccharide was 10%at5.0g /L calcium hydrogen and24g /LTRS.The absorption isothermo f coloring matters on FCPPbelonged t o Langmir type.

Key words: xylo-oligosaccharide, fresh calciumphosphate precipitate, coloring matters, adsorption decol-orization