2、tract:Thispaperfocusesonthecharacteristicsofacidphaseintwo-phaseUASBtreatingmolasseswastewater.Theresultsshowedthatthesystemworkedwellwhenvolumetricloadingreached30 kg COD/m3,meanwhileTOCremovalrateswereabove35%andSO42-removalrateswereabout70%.Acidratesofmolasseswastewaterwereabout50%.Acidogenicandm