Changes in characteristics of cation exchange resin in cyclic operation for lysine recovery from lysine fermentation broth
✍ Scribed by Tetsuya Kawakita; Yoshihiro Koga; Tsutomu Matsuishi; Hideo Hayasaki; Akira Tsukahara
- Publisher
- Elsevier Science
- Year
- 1991
- Weight
- 478 KB
- Volume
- 14
- Category
- Article
- ISSN
- 0923-1137
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✦ Synopsis
The mechanism of deterioration of a cation exchange resin (Diaion SK-IB of ammonium form) was examined by using a life tester operated with a sequential control. Resins sampled at intervals were analyzed for composition, ion exchange capacity and maximum amount of lysine adsorbed The loss of resin capacity per volume appears to be caused by ( 1) irreversible loss of -SO 3 groups, (2) both cleavege of the network structure of resin by oxidation reaction and fouling induced mainly by colored substances derived from lysine fermentation broth. Regenerants such as sodium sulfite, sodium nitrite and sodium hydroxide are not effective for complete regeneration of resin capacity at 60°C. Finally, the optimum number of cycles for which the resin can be used was determined.