MODEL-BASED CONTROL OF FEED RATE AND ILLUMINANCE IN A PHOTOSYNTHETIC FED-BATCH REACTOR FOR H2S REMOVAL

被引:7
作者
KIM, BW
KIM, EH
LEE, SC
CHANG, HN
机构
[1] KOREA ADV INST SCI & TECHNOL,DEPT CHEM ENGN,TAEJON 305701,SOUTH KOREA
[2] KOREA ATOM ENERGY RES INST,DIV ENVIRONM SYST,TAEJON 305353,SOUTH KOREA
[3] KOREA ADV INST SCI & TECHNOL,BIOPROC ENGN RES CTR,TAEJON 305701,SOUTH KOREA
来源
BIOPROCESS ENGINEERING | 1993年 / 8卷 / 5-6期
关键词
D O I
10.1007/BF00369839
中图分类号
Q81 [生物工程学(生物技术)]; Q93 [微生物学];
学科分类号
071005 ; 0836 ; 090102 ; 100705 ;
摘要
Traditional application of computer to fermentation processes has focused on the measurement and control of parameters such as temperature, pH, vessel pressure, sparge rate, dissolved oxygen, substrate concentration, and product concentration. In a fed-batch reactor with the photosynthetic green sulfur bacterium Chlorobium thiosulfatophilum which converts hydrogen sulfide to elementary sulfur or sulfate, separate measurement of cell mass concentration and sulfur particle concentration turbidimetrically was difficult due to their combined contributions to the total turbidity. Instead of on-line measurement of many process variables, a model-based control of feed rate and illuminance was designed. Optimal operation condition relating feed rate vs. light intensity was obtained to suppress the accumulation of sulfate and sulfide, and to save light energy in a 4-1 photosynthetic fed-batch reactor. This relation was correlated with the increasing cell mass concentration. A model which describes the cell growth by considering the light attenuation effects due to scattering and absorption, and to crowding effect of the cells, was established beforehand with the results from the experiments. Based on these optimal operating conditions and the cell growth model, automatic controls of feed rate and illuminance were carried out alternatively to the traditional application of computer to fermentation with on-line measurement, real-time response and adjustment of process variables.
引用
收藏
页码:263 / 269
页数:7
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