Study on control technique in flocculating separation process of fermentation broth

摘要

For reforming jar testing and increasing separation efficiency, separation technology of fermentation broth was studied by controlling the process of flocculation. The tried new system to be operated continuously was composed of the processes of transporting fermentation broth, flocculating the broth and separating the one. The experimental course of controlling the process of flocculation was as follows: the broth was conveyed by a pump and pipeline from fermentation pot to a mixer in which a flocculant and the broth were mixed, afterward the broth flowing from the mixer was flocculated continuously in the column, and then the flocs flowing from the column were separated from the broth by filtrating or centrifugal precipitating. The experimental results showed that the filtration rate of the broth was 65% larger and precipitation rate of the flocs in the broth was 47% larger by the novel separation technology than jar testing. The results offer important evidence not only for reforming intermittent operation into continuous operation in flocculating technology of fermentation broth, and for flocculated the broth to be separated with great efficiency by filtrating or centrifugal precipitating in industry, but also for researching the law between conditions of the separation process and micro-size of the flocs.