提取七叶皂苷钠的废水处理

TREATMENT METHOD OF WASTE WATER OF EXTRACTING SODIUM AESCINATE

提取七叶皂苷钠废水中含有七叶皂苷钠、淀粉、色素、胶质。其中七叶皂苷钠易起泡,不易回收和处理,本文采用加抑泡剂(YP1),深度处理回收釜残液,使综合废水浓度降低,经水解酸化3h,好氧生物处理6h,出水CODCr<100mgL,达到国家规定的排放标准。

There are starch,pigment and pectin in the waste water of extracting sodium aescinate.Sodium aescinate in the extractant is easy to form foam and difficult to be reclaimed and treated.The concentration of synthetic waste water was reduced by foam inhibitor(YP-1),and was used to treat and recover residual effluent,thus reducing the concentration of the synthetic wastewater.The COD_ Cr of effluent was less than 100 g/L,which could meet the national discharge standard by three hours treatment of hydrolytic acidification and six hours treatment of aerobic biotreatment.