硅藻土固定细胞-陶瓷膜微泡曝气-搅拌釜式反应器生物脱硫的研究  

Celite immobilized cells-ceramic membrane aeration-stirred tank reactor for biodesulfurization process

作　　者：朱飞燕[1] 魏雪团[2] 胡中波[1] 罗明芳[3] 刘会洲[2] 

机构地区：[1]中国科学院大学材料科学与光电技术学院,北京100049 [2]中国科学院过程工程研究所绿色过程工程重点实验室,北京100190 [3]中国科学院微生物研究所技术转移转化中心,北京100101

出　　处：《计算机与应用化学》2013年第5期483-486,共4页Computers and Applied Chemistry

基　　金：国家自然科学基金资助项目(20976186)

摘　　要：Pseudomonas delafieldii R-8是一株高效的脱硫菌,是好氧菌。陶瓷膜微泡曝气能产生100μm左右的气泡,理论的利用率能达到100%,并且膜管在曝气的过程中有滤菌作用,可以节约能耗。搅拌釜式反应器在气液之间的混合效果好、相接触面积大以及传质效果好。本文首次使用陶瓷膜微泡曝气技术,研究了硅藻土固定化的R-8细胞在搅拌釜式反应器中的脱硫反应,得到最优的脱硫条件为:温度为30℃,搅拌转速为400 rpm以及通气量为0.04 MPa。等量的细菌量进行生物脱硫,陶瓷膜微泡曝气的初始脱硫速率以及24 h的总脱硫率分别为0.12 mmol/h和91%,而传统的鼓泡曝气的的初始脱硫速率以及24 h的总脱硫率分别为0.07 mmol/h和23%,使用陶瓷膜微泡曝气的初始比脱硫率以及24 h的总脱硫率要远远大于传统鼓泡曝气,因此,陶瓷膜微泡曝气具有明显的优越性。Pseudomonas delafieldii R-8 is a high effiency desulfurized bacteria, and it is a aerobic bacteria. Ceramic membrane-aeration system could produce bubbles of 100 tun, and the oxygen utilization percentage could reach 100% in theory. The membrane could have a function of filter the bacteria, so it can save energy consumption of sterilization. The stirred tank reactor could offer a sufficient mixing and a large area between the liquid phase and the gas phase, and the mass transfer is satisfied. A new 700 mL stirred tank reactor was firstly introduced for the biodesulfurization process combined with the celite immobilized cells and the ceramic membrane aeration. The optimized conditions were that the agitation speed was 400 rpm and the oxygen pressure was 0.04 MPa at 30℃. The initial rate and desulfurization ratio in 24 h in the ceramic membrane-aerated system were 0.12 mmol/h and 91%, and that of traditional bubble-aerated system were 0.07 mmol/h and 23%. The initial rate and desulfurization ratio in 24 h in the ceramic membrane-aerated system were higher than that in traditional bubble-aerated system obviously, thus the ceramic membrane-aerated system showed obvious advantages over the traditional bubble- aerated system.

关 键 词：硅藻土 陶瓷膜曝气 搅拌釜式反应器 德氏假单胞菌R-8 

分 类 号：TQ033[化学工程]