Thispaperdevotedtofindingprocessingmethodsofalkalinehydrolysateproducedfromricehuskpre-extraction,anddiscussesalkalinehydrolysateprocessingschemedanddisengagementofsomeproducts:amorphoussilicaofvariousquality,alkalinelignin,andwaterandalkalineextractionpolysaccharides.Silicasampleswerecharacterized:crude(air-dried),burnt(nopreliminarywatertreatment),washedindistilledwater,andwashedindistilledwaterandburnt.Wastewaterparametersupontheextractionofsolidsfromalkalinehydrolysatedroppedafewdozensorthousandtimesdependingontheappliedprocessingmethod.Colordecreasedafewthousandtimes,turbiditywasvirtuallyeliminated,chemicaloxygendemandedabout20–136times;polyphenolscontentmightdecrease50%orbevirtuallyeliminated.Themostprospectiveschemeobtainedthetwofollowingsolidproductsfromricehuskalkalinehydrolysate:amorphoussilicaandalkalineextractionpolysaccharide.Chemicaloxygendemandoftheremainingwastewaterdecreasedabout140timescomparedtothesilica-freesolution.
