CAJ | 학술논문

以丁二酸发酵液为研究体系,采用静态吸附法研究了颗粒活性炭对丁二酸发酵液色素的吸附过程;并考察了搅拌转速对活性炭吸附色素过程的影响。结果表明活性炭对色素的吸附是以物理吸附为主的吸热过程,其吸附热为12.54 kJ.mol 1,适宜的脱色温度有利于提高活性炭的利用效率,热水解吸可实现活性炭的再生;活性炭对色素的初始吸附速度随搅拌转速增加而增加;在活性炭快速吸附阶段,液膜扩散为主要控速步骤,增加搅拌转速可减少颗粒液膜层的厚度,有效扩散系数随之增加。通过考察进料对活性炭层析柱的脱色效果的影响,结果表明合适的进料流速能提过活性炭的利用率。
이정이산발효액위연구체계,채용정태흡부법연구료과립활성탄대정이산발효액색소적흡부과정;병고찰료교반전속대활성탄흡부색소과정적영향。결과표명활성탄대색소적흡부시이물리흡부위주적흡열과정,기흡부열위12.54 kJ.mol 1,괄의적탈색온도유리우제고활성탄적이용효솔,열수해흡가실현활성탄적재생;활성탄대색소적초시흡부속도수교반전속증가이증가;재활성탄쾌속흡부계단,액막확산위주요공속보취,증가교반전속가감소과립액막층적후도,유효확산계수수지증가。통과고찰진료대활성탄층석주적탈색효과적영향,결과표명합괄적진료류속능제과활성탄적이용솔。
By taking the succinic acid fermentation broth as the research object,the adsorption process of the pigment from succinic acid fermentation broth on activated carbon was studied by static absorption method,and the effects of pigments concentration and rotation speed on adsorption were also discussed.The results showed that the adsorption was endothermic process,and physical adsorption was the dominant,the isosteric heat of adsorption is 12.54 kJ/mol,suitable temperature is helpful to increase the adsorption efficiency.The activated carbon can be reused by using hot water.The initial absorbing rate of the activated carbon increased with the rotation speed.Film diffusion was the major rate-controlling step in the fast adsorption phases,the thickness of liquid film decreased with rotation speed,and the effective diffusion coefficient increased,which suggested the adsorption properties of activated carbon column could be improved by optimizing flow rate.And the result showed that the suitable flow ratio was beneficial to improve the utilization ratio of activated carbon.