Method for extracting L-proline from fermentation liquor by membrane separation technology
A technology of proline and fermented liquid, which is applied in the field of extracting L-proline from fermented liquid by using membrane separation technology, can solve problems such as difficult to solve environmental protection problems, difficult to guarantee operating environment, large amount of waste water, etc., and achieve energy saving and reduction Significant discharge, promotion of sustainable development, and the effect of reducing wastewater discharge
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[0017] Example
[0018] 1) Microfiltration filtration: 1500Kg of L-proline fermentation broth with a content of 6% is filtered through microfiltration. The membrane material used in the microfiltration filtration is a ceramic membrane with a pore size of 0.05μm. The operating temperature is 55°C and the inlet pressure is 3.0bar, the output pressure is 1.0bar, wash with 600Kg of protein to obtain 1900Kg of L-proline microfiltration dialysate and 200Kg of bacterial protein. The transmittance of the dialysate is 80%. The protein is dried as feed ;
[0019] 2) Ultrafiltration filtration: the microfiltration dialysate obtained in step 1) is filtered through ultrafiltration. The membrane material used for ultrafiltration is an ultrafiltration membrane with a PVDF with a molecular weight cut-off of 30,000. The operating temperature is 40°C and the inlet pressure is 7 bar. The output pressure is 2bar, and 600Kg of protein is used to wash water to obtain 2300Kg of ultrafiltration dialysate...
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