| 摘要 |
The invention discloses a method for separating, extracting and purifing pol y- .beta. -hydroxyalkanoates (PHAs) directly from bacterial fermented broth, which technical field is biotechnological downstream succesive treatment. Th e method of the invention comprising steps of: physical crushing pretreatment of the bacterial fermented broth; conditioning PH of the bacterial fermented broth to alkalinity, adding anionic surfactant and agitating reaction liquid ; separating and extracting precipitation; washing and drying. The process of the invention is simple, cheap, high yield and no pollution, and can realize large scale industrial producting.
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