Abstract: The application of foam fractionation in recovery of lactoalbumin from soy protein wastewater was studied. The influence of various operation parameters was also investigated. The experimental results showed that the effect on separation was differently influenced by pH，gas velocity，initial feed concentration，pool height and foam height. Low gas velocity，high foam level，low initial concentration，and appropriate pH were the optimum conditions. The enrichment ratio could reach 3.25 when concentration of feed was 0.54 g/L，pH was 5，ratio between foam height and pool height was 4∶1，gas velocity was15.0 L/h. When concentration of feed was 0.54 g/L，pH was 5，ratio between foam height and pool height was 3∶1，gas velocity was15.0 L/h，the highest value of removal rate obtained was 48.5%.

摘要： 采用泡沫分离法回收大豆蛋白废水中蛋白，考察了pH值、气体的流速、进料浓度、液柱和泡沫层高度等因素对分离效果的影响。低进气速度、高泡沫层高度、适当的pH值以及低进料浓度有利于较好的分离。结果表明：当进料浓度为0.54 g/L、pH值为5、泡沫层与液池高度比4∶1，通气量为15.0 L/h 时，富集比可以达到3.25；当进料浓度为0.54 g/L、pH值为5、泡沫层与液池高度比3∶1，通气量为15.0 L/h，此时脱除率可以达到48.5%。