Continuous recovery process of succinic acid from fermentation broth using reactive extraction in hollow fiber membrane contactor = 중공사막 접촉기에서 반응추출을 이용한 발효조로부터의 숙신산 연속 회수 공정

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Succinic acid, a four carbon dicarboxylic acid, has received a great deal of attention for many years because it can be used as a raw material for biodegradable polymer. As an alternative to the petrochemical-based process, the intensive study on organic acid production through the fermentation process is in progress. In this study, we investigated reactive extraction of succinic acid (SA) from aqueous solutions using a hollow fiber membrane contactor. Tri-n-octylamine(TOA) and 1-octanol were employed as extractant and diluent, respectively. We verified the effect of volumetric flow rate of shell side, initial concentration of succinic acid and TOA, pH of feed solution and salts on forward extraction and concentration of SA/TOA and stripping solution on backward extraction. The effect of TOA concentration on forward extraction was dominant among the various operating variables considered. The extraction rate was proportional to the amine concentration. At the pH above the $pK_{a_1}$ (4.21) of succinic acid, extraction performance was significantly reduced and even worse above $pK_{a_2}$ (5.64) approaching zero in extraction performance. There was no remarkable effect of volumetric flow rate on extraction and stripping in measured interval. Simultaneous forward and backward extraction was carried out at optimized conditions which are determined by individual forward and back ward extraction. Total input concentration of succinic acid was about 150 g/L and final concentration of sodium succinate in stripping solution was about 177 g/L. In simultaneous extraction from fermentation broth final concentration of sodium succinate was about 68.1g/L. As a result, the developed process enabled to producing the succinic acid with high yield (86 %) by controlling concentration of feed solution, pH, transmembrane pressure difference.
Hong, Won-Hiresearcher홍원희researcher
한국과학기술원 : 생명화학공학과,
Issue Date
419028/325007  / 020083064

학위논문(석사) - 한국과학기술원 : 생명화학공학과, 2010.2, [ ix, 79 p. ]


tri-n-octylamin; succinic acid; hollow fiber membrane; reactive extraction; fermentation broth; 발효조; 트리옥틸아민; 숙신산; 중공사막; 반응추출

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