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Evaluation of a novel choanoid fluidized bed bioreactor for future bioartificial livers 被引量:8
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作者 Cheng-Bo Yu Xiao-Ping Pan +6 位作者 Liang Yu Xiao-Peng Yu Wei-Bo Du Hong-Cui Cao Jun Li Ping Chen Lan-Juan Li 《World Journal of Gastroenterology》 SCIE CAS 2014年第22期6869-6877,共9页
AIM: To construct and evaluate the functionality of a choanoid-fluidized bed bioreactor (CFBB) based on microencapsulated immortalized human hepatocytes.
关键词 Choanoid Fluidized bed bioreactor Immortalized human hepatocytes Bioartificial liver
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Continuous Degradation of Chitosan in a Convoluted Fibrous Bed Bioreactor with Immobilized Trichoderma reesei 被引量:1
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作者 吴绵斌 夏黎明 岑沛霖 《Chinese Journal of Chemical Engineering》 SCIE EI CAS CSCD 2002年第1期84-88,共5页
Continuous hydrolysis of chitosan was performed in a convolutedfibrous bed bioreactor (CFBB) with immobilized t. reesei. At dilutionrate of 0.4 d^-1 and substrate concentration of 2/100 (mass vs.Volume), the average d... Continuous hydrolysis of chitosan was performed in a convolutedfibrous bed bioreactor (CFBB) with immobilized t. reesei. At dilutionrate of 0.4 d^-1 and substrate concentration of 2/100 (mass vs.Volume), the average degree of polymerization of hydrolysate can bekept at 1.25-1.35, which can be easily regulated by changing dilutionrate or inlet chitosan concentration. 展开更多
关键词 continouus degradation chitosanase production chitosan degradation fibrous bed bioreactor
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Optimization of Zeaxanthin Production by Immobilized <i>Flavobacterium</i>sp. Cells in Fluidized Bed Bioreactor
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作者 Ma Del Carmen Chavez-Parga Alejandro Munguia-Franco +1 位作者 Mayanin Aguilar-Torres Eleazar M. Escamilla-Silva 《Advances in Microbiology》 2012年第4期598-604,共7页
From time immemorial, human beings have used pigments made from vegetables, fruits, superior plants, animal tissues and cereals. One of the greatest sources of pigments is the bacterium that, with the use of the moder... From time immemorial, human beings have used pigments made from vegetables, fruits, superior plants, animal tissues and cereals. One of the greatest sources of pigments is the bacterium that, with the use of the modern technology, has increased the production of metabolites of interest. The microbiological production of carotenoids has not been optimized to obtain pigment production quantities of pigments and carotenoids recovery that lower production costs. The aim of this work was to design a Zeaxanthin production process with Flavobacterium sp. immobilized cells in a fluidized bed bioreactor. An optimum culture medium for Zeaxanthin production in stirred flasks (2.46 g·L–1) was obtained. Furthermore, optimum process conditions for a maximum yield of Zeaxanthin production, by fluidized bed bioreactor, were established. A statistical analysis showed that the most significant factors were air flow, pH and NaCl concentration (4.5 g·L–1). In this study a maximum Zeaxanthin production of 3.8 g·L–1 was reached. The highest reported yield to date was 0.329 g·L–1. 展开更多
关键词 Fluidized bed bioreactor Orthogonal Design FLAVOBACTERIUM sp. ZEAXANTHIN
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Study on Temperature Gradients and Protein Enrichment by <i>Aspergillus oryzae</i>in Solid-State Fermentation on Packed Bed Bioreactor Using Jowar (Sorghum) Straw as Substrate
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作者 Ganesh A. Bathe Vilas S. Patil Ashish S. Chaurasia 《Journal of Sustainable Bioenergy Systems》 2012年第3期33-36,共4页
The packed bed solid state bioreactor designated as PBSSB is constructed in the present study. The experiments are carried out in packed bed bioreactor with jowar straw and inoculated with Aspergillus oryzae. Temperat... The packed bed solid state bioreactor designated as PBSSB is constructed in the present study. The experiments are carried out in packed bed bioreactor with jowar straw and inoculated with Aspergillus oryzae. Temperature gradient has been measured at different axial positions. It is found that the organisms grew rapidly during the period from 20 to 30 h during which heat generation is more. These results are in agreement with other researchers. The fermented jowar straw shows threefold increase in protein content. This can be utilized as high value nutritional feed to animals. 展开更多
关键词 Solid-State Fermentation PACKED-bed bioreactor Aspergillus ORYZAE Jowar STRAW Temperature Gradient
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Anaerobic-aerobic processes for the treatment of textile dyeing wastewater containing three commercial reactive azo dyes:Effect of number of stages and bioreactor type 被引量:1
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作者 Banafsheh Azimi Elham Abdollahzadeh-Sharghi Babak Bonakdarpour 《Chinese Journal of Chemical Engineering》 SCIE EI CAS CSCD 2021年第11期228-239,共12页
In this study,the effect of number of stages and bioreactor type on the removal performance of a sequential anaerobic-aerobic process employing activated sludge for the treatment of a simulated textile dyeing wastewat... In this study,the effect of number of stages and bioreactor type on the removal performance of a sequential anaerobic-aerobic process employing activated sludge for the treatment of a simulated textile dyeing wastewater containing three commercial reactive azo dyes was considered.Two stage processes performed better than one stage ones,both in terms of overall organic and color removal,as well as the higher contribution of anaerobic stage to the overall removal performance,thereby making them a more energy efficient option.The employment of a moving bed sequencing batch biofilm reactor,which uses both suspended and attached biomass,for the implementation of the anaerobic stage of the process,was compared with a sequencing batch reactor that only employs suspended biomass.The results showed that,although there was no meaningful difference in biomass concentration between the two bioreactors,the latter reactor had better performance in terms of chemical oxygen demand(COD)removal efficiency and rate and color removal rate.Further exploratory tests revealed a difference between the roles of suspended and attached bacterial populations,with the former yielding better color removal whilst the latter had better COD removal performance.The sequential anaerobic–aerobic process,employing an aerobic membrane bioreactor in the aerobic stage resulted in COD and color removal of 77.1±7.9%and 79.9±1.5%,respectively.The incomplete COD and color removal was attributed to the presence of soluble microbial products in the effluent and the autoxidation of dye reduction metabolites,respectively.Also,aerobic partial mineralization of the dye reduction metabolites,was experimentally observed. 展开更多
关键词 WASTEWATER ANAEROBIC AEROBIC Anaerobic moving bed sequencing batch biofilm reactor Anaerobic sequencing batch reactor Aerobic membrane bioreactor
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Evaluation of the Inverse Fluidized Bed Biological Reactor for Treating High-Strength Industrial Wastewaters 被引量:5
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作者 Wlodzimierz Sokól Belay Woldeyes 《Advances in Chemical Engineering and Science》 2011年第4期239-244,共6页
The aim of this work was to investigate the aerobic degradation of high-strength industrial (refinery) wastewaters in the inverse fluidized bed biological reactor, in which polypropylene particles of density 910 kg/m3... The aim of this work was to investigate the aerobic degradation of high-strength industrial (refinery) wastewaters in the inverse fluidized bed biological reactor, in which polypropylene particles of density 910 kg/m3 were fluidized by an upward flow of gas through a bed. Measurements of chemical oxygen demand (COD) versus residence time t were performed for various ratios of settled bed volume to reactor volume (Vb/VR) and air velocities u. The largest COD reduction, namely, from 54,840 to 2,190 mg/l, i.e. a 96% COD decrease, was achieved when the reactor was operated at the ratio (Vb/VR) = 0.55, air velocity u = 0.046 m/s and t = 65 h. Thus, these values of (Vb/VR), u and t can be considered as the optimal operating parameters for a reactor when used in treatment of high-strength refinery wastewaters. In the treatment operation conducted in a reactor optimally controlled at (Vb/VR) = 0.55, u = 0.046 m/s and t = 65 h, the conversions obtained for all phenolic constituents of the wastewater were larger than 95%. The conversions of about 90% were attained for other hydrocarbons. 展开更多
关键词 Biological Wastewater Treatment Aerobic Wastewater Treatment High-Strength Industrial Wastewaters Inverse Biological Reactor Fluidized bed bioreactor Low-Density Biomass Support
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An Experimental Study on the Treating River Sewage with New Bioreactor
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作者 Jiang Fan Chen Weiping Zhang Tao 《Chinese Journal of Population,Resources and Environment》 北大核心 2007年第1期33-38,共6页
A new bioreactor on the basis of a dynamic fluidized bed was designed, which combines advantages of the fluidized bed and a biological contactor. The experiments of start-up, nor- mal operation and parameter adjustmen... A new bioreactor on the basis of a dynamic fluidized bed was designed, which combines advantages of the fluidized bed and a biological contactor. The experiments of start-up, nor- mal operation and parameter adjustment are carried out. The re- sults show that the bioreactor can be quickly started up in the condition that the fill is 50%, the hydraulic retention time is 72 min, aerate speed is 2.5 m3/h, rotation-cage rotated speed is 1.5 r/min, and the removal rates of chemical oxygen demand (CODCr) and Ammonia nitrogen (NH3-N) are 75.34% and 80.98% respec- tively. The influence of the operation parameter on removal rates of the bioreactor is analyzed, and an appropriate operation pa- rameter is provided. 展开更多
关键词 rotation-cage-type suspended carrier bioreactor dynamic fluidized bed parameter adjustment
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Optimal Aerations in the Inverse Fluidized Bed Biofilm Reactor When Used in Treatment of Industrial Wastewaters of Various Strength
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作者 Wlodzimierz Sokól 《Advances in Chemical Engineering and Science》 2012年第3期384-391,共8页
The aim of this work was the determination of the optimal aerations, and more specifically the corresponding optimal air velocities uopt, at which the largest COD removals were achieved in treatment of industrial wast... The aim of this work was the determination of the optimal aerations, and more specifically the corresponding optimal air velocities uopt, at which the largest COD removals were achieved in treatment of industrial wastewaters of various strength conducted in the inverse fluidized bed biofilm reactor. The largest COD removals were achieved at the following air velocities uopt and retention times ts, and (Vb/VR) = 0.55: i) for CODo = 72,780 mg/l at uopt = 0.052 m/s and ts = 80 h;ii) for CODo = 62,070 mg/l at uopt = 0.042 m/s and ts = 65 h;iii) for CODo = 49,130 mg/l at uopt = 0.033 m/s and ts= 55 h;iv) for CODo = 41,170 mg/l at uopt = 0.028 m/s and ts = 45 h;v) for CODo = 35,460 mg/l at uopt = 0.025 m/s and ts = 27.5 h;and vi) for CODo = 26,470 mg/l at uopt= 0.014 m/s and ts = 22.5 h. In the treatment operation conducted in a reactor optimally controlled at the above values of uopt, ts and (Vb/VR), the following decreases in COD were obtained: i) from 72,780 to 5410 mg/l;ii) from 62,070 to 3730 mg/l;iii) from 49,130 to 2820 mg/l;iv) from 41,170 to 1820 mg/l;v) from 35,460 to 1600 mg/l;and vi) from 26,470 to 1180 mg/l, that is, approximately a 93%, 94%, 95%, 96%, 95% and 96% COD reduction was attained, respectively. 展开更多
关键词 Optimal Aeration Aerobic Wastewater Treatment Biological Wastewater Treatment Inverse Biofilm Reactor Fluidized bed bioreactor Low-Density Biomass Support
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凡纳滨对虾循环水养殖系统生物膜反硝化菌研究
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作者 李雅媛 张旺 +3 位作者 刘兴国 肖述文 江海鑫 陆诗敏 《水产科学》 CAS CSCD 北大核心 2024年第5期775-783,共9页
硝态氮去除对于养殖尾水再利用及达标排放具有重要意义。为探明凡纳滨对虾循环水养殖系统中移动床生物反应器的反硝化潜力和氮代谢通路特征,对其表面生物膜菌群结构和反硝化效率进行分析。Illumina测序结果显示:所有样本优势菌门均为变... 硝态氮去除对于养殖尾水再利用及达标排放具有重要意义。为探明凡纳滨对虾循环水养殖系统中移动床生物反应器的反硝化潜力和氮代谢通路特征,对其表面生物膜菌群结构和反硝化效率进行分析。Illumina测序结果显示:所有样本优势菌门均为变形菌门(20.31%~25.36%)和拟杆菌门(14.42%~24.28%);在属水平上,红球菌属(0.28%~0.97%)、副球菌属(0.50%~0.99%)和假单胞菌属(0.15%~0.30%)等好氧反硝化菌主要负责硝态氮还原。实时荧光定量PCR结果显示,生物膜中反硝化功能基因nirK基因丰度高于nirS基因和nosZ基因,nirK型反硝化微生物是主要的反硝化微生物类群。原核生物功能注释结果表明,生物膜中存在活跃的异养反硝化代谢途径,可能受制于有限碳源,反硝化菌之间,及其和生物膜优势菌属之间以竞争关系为主。厌氧脱氮模拟试验表明,在不添加碳源条件下,填料生物膜可将对虾养殖水体硝态氮去除98.07%。基于上述氮代谢通路特征,本试验进一步提出短程反硝化-厌氧氨氧化对虾养殖废水硝态氮去除优化策略。此结果为深入理解循环水养殖系统氮素代谢通路及未来管理、利用填料生物膜内源性碳源和潜在反硝化功能提供理论依据。 展开更多
关键词 nirS基因 nirK基因 nosZ基因 移动床生物反应器 原核生物功能注释
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固定化细胞流化床反应器处理难降解有机物喹啉的试验研究 被引量:17
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作者 韩力平 王建龙 +2 位作者 刘恒 施汉昌 钱易 《环境科学》 EI CAS CSCD 北大核心 2001年第1期78-80,共3页
采用PVA 硼酸 纱布法将筛选得到的能够利用喹啉作为唯一碳源、氮源和能源的皮氏伯克霍尔德氏菌(Burkholderiapickettii)固定化 ,将固定化细胞投加到流化床反应器中处理不同浓度的喹啉废水 ,喹啉初始浓度为 1 0 0、350和 50 0mg/L时 ,喹... 采用PVA 硼酸 纱布法将筛选得到的能够利用喹啉作为唯一碳源、氮源和能源的皮氏伯克霍尔德氏菌(Burkholderiapickettii)固定化 ,将固定化细胞投加到流化床反应器中处理不同浓度的喹啉废水 ,喹啉初始浓度为 1 0 0、350和 50 0mg/L时 ,喹啉完全去除所需时间分别为 2 5、6和 1 2h .动力学试验结果表明 ,固定化细胞流化床反应器内喹啉的降解过程遵循零级反应动力学 .利用固定化细胞流化床反应器连续处理不同浓度的喹啉废水 ,考察了不同水力停留时间 (稀释率 )对处理效果的影响及流化床反应器耐冲击负荷的能力 . 展开更多
关键词 固定化细胞 流化床反应器 生物降解 喹啉 有机废水处理
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内循环生物流化床处理石化废水的中试研究 被引量:35
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作者 周平 汪诚文 +1 位作者 吴晓磊 钱易 《环境科学》 EI CAS CSSCI CSCD 北大核心 1997年第1期26-29,共4页
进行了内循环生物流化床处理石化废水的中试研究.当进水平均COD为800mg/L,流化床出水再辅之以气浮后处理,COD可降至200mg/L;当进水COD为500mg/L时,COD可达100mg/L,本试验中的COD去除... 进行了内循环生物流化床处理石化废水的中试研究.当进水平均COD为800mg/L,流化床出水再辅之以气浮后处理,COD可降至200mg/L;当进水COD为500mg/L时,COD可达100mg/L,本试验中的COD去除容积负荷可达15kg/(m3·d)以上. 展开更多
关键词 生物流化床 气浮后处理 废水处理 石油化工
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自絮凝颗粒酵母酒精高浓度连续发酵的研究 被引量:17
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作者 刘传斌 白凤武 +2 位作者 邵梅 谢健 李宁 《微生物学报》 CAS CSCD 北大核心 2001年第3期367-371,共5页
在四釜串联气升环流悬浮床生物反应器系统中 ,进行了絮凝颗粒酵母酒精连续发酵的研究。以CO2 为驱动动力 ,发酵液液蒸馏废液全循环 ,稀释率为 0 2 h。发酵成熟醑酒精平均浓度为 96 6g L ,残余还原糖和总糖分别为 1 2g L和 4 1g L。
关键词 自絮凝酵母颗粒 酒精发酵 悬浮床生物反应器
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复合床生物反应器处理恶臭气体和污水 被引量:21
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作者 郭静 匡颖 +1 位作者 王召 杨秀文 《中国给水排水》 CAS CSCD 北大核心 2001年第9期10-13,共4页
复合床生物反应器内充填了粘土陶粒和轻质悬浮填料 ,是生物滤池和移动床生物膜反应器结合为一体的新型生物反应器。该生物反应器能够同时处理臭气和污水 ,且除臭效果好 ,无堵塞问题。试验结果表明 ,在 11~ 15℃气温下 ,当恶臭气体中H2 ... 复合床生物反应器内充填了粘土陶粒和轻质悬浮填料 ,是生物滤池和移动床生物膜反应器结合为一体的新型生物反应器。该生物反应器能够同时处理臭气和污水 ,且除臭效果好 ,无堵塞问题。试验结果表明 ,在 11~ 15℃气温下 ,当恶臭气体中H2 S含量为 5 0 0mg/L、污水的COD为 2 0 0~ 80 0mg/L时 ,H2 S与COD的去除率分别为 90 %和 80 %。 展开更多
关键词 复合床生物反应器 除臭 污水处理 恶臭气体
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流化床工艺在水处理中的应用研究进展 被引量:11
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作者 葛杰 宋永会 +2 位作者 王毅力 钱锋 林郁 《环境工程技术学报》 CAS 2014年第1期46-52,共7页
流化床工艺是一种工程应用前景广阔的处理技术,近年来该技术备受水处理研究者的青睐。已经研究出了多种反应器结构和工艺组合,如鸟粪石结晶流化反应器、三相生物流化床,具有结构紧凑、反应速度快,易于操作的优点。根据废水中污染物的去... 流化床工艺是一种工程应用前景广阔的处理技术,近年来该技术备受水处理研究者的青睐。已经研究出了多种反应器结构和工艺组合,如鸟粪石结晶流化反应器、三相生物流化床,具有结构紧凑、反应速度快,易于操作的优点。根据废水中污染物的去除机理将流化床归为流化床结晶反应器和流化床生物反应器两大类,论述该工艺在含磷、含氟、含硫废水,印染废水,农药废水及其他工业废水中的应用研究现状,展望了流化床反应器的发展趋势。 展开更多
关键词 流化床 废水处理 流化床结晶反应器 流化床生物反应器
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甜高粱茎秆汁液固定化酵母酒精发酵的研究 被引量:40
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作者 刘荣厚 李金霞 +1 位作者 沈飞 孙清 《农业工程学报》 EI CAS CSCD 北大核心 2005年第9期137-140,共4页
本文应用一元线性回归分析法得出了甜高粱茎秆汁液锤度和可溶性总糖含量之间的关系。以甜高粱茎秆汁液为原料,在摇床及流化床反应器上进行了固定化酵母酒精发酵的试验研究。结果表明,以沈农甜杂2号甜高粱为原料,在摇床上作营养盐配... 本文应用一元线性回归分析法得出了甜高粱茎秆汁液锤度和可溶性总糖含量之间的关系。以甜高粱茎秆汁液为原料,在摇床及流化床反应器上进行了固定化酵母酒精发酵的试验研究。结果表明,以沈农甜杂2号甜高粱为原料,在摇床上作营养盐配比的正交试验,试验得出对提高酒精得率影响因素的主次顺序为:(NH4)2SO4,K2HPO4,MgSO4。最优组合为:0.125%K2HPO4,0.200%(NH4)2SO4.0.050%MgSO4。加营养盐的酒精得率比不加任何营养盐的酒精得率可提高4.0%~8.0%。K2HPO4,(NH4)2SO4的配比对试验结果影响极显著,MgSO4的配比对试验结果影响显著。在流化床反应器上试验,4种较优营养盐组合酒精得率近乎相等,比不加营养盐空白试验酒精得率高。从降低成本角度来讲,选择0.125%K2HPO4,0.200%(NH4)2S4,0.010%MgSO4作为投产试验。本文为燃料乙醇的发展提供了科学的依据。 展开更多
关键词 甜高粱茎秆汁液 固定化酵母 营养盐 酒精发酵 流化床生物反应器
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好氧生物流化床反应器处理有机废水技术进展 被引量:29
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作者 何卫中 刘有智 《化工环保》 CAS CSCD 北大核心 1999年第5期278-283,共6页
介绍了国内外好氧生物流化床反应器处理有机废水技术的发展概况,分析了好氧生物流化床反应技术的发展动向。
关键词 流化床 有机废水 生物反应器 废水处理 好氧
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有机负荷对秸秆床反应器厌氧生物产沼气的影响 被引量:6
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作者 曹杰 陈广银 +2 位作者 常志州 叶小梅 杜静 《中国环境科学》 EI CAS CSCD 北大核心 2014年第5期1200-1206,共7页
在实验室条件下,以打捆麦秸为固定相,以猪场废水为流动相,采用半连续进料方式,考察了不同猪场废水容积负荷对秸秆床反应器产沼气的影响.结果表明:发酵前25d,较高的猪场废水有机负荷对反应器产气有一定抑制,之后日产气量和容积产气量迅... 在实验室条件下,以打捆麦秸为固定相,以猪场废水为流动相,采用半连续进料方式,考察了不同猪场废水容积负荷对秸秆床反应器产沼气的影响.结果表明:发酵前25d,较高的猪场废水有机负荷对反应器产气有一定抑制,之后日产气量和容积产气量迅速增加,并明显高于低猪场废水有机负荷的处理,当猪场废水容积负荷为7.2kgCOD/(m3·d)时,厌氧反应器最大容积产气量达2.29m3/(m3·d),产气稳定后维持在1.52~1.76m3/(m3·d),较猪场废水容积负荷为2.4,1.44kgCOD/(m3·d)的处理分别提高了50%和130%以上,对产气中甲烷含量无明显影响;较高的猪场废水容积负荷不利于麦秸厌氧发酵产沼气,发酵后麦秸干物质损失率、纤维素和半纤维素分解率均与猪场废水容积负荷成反比,红外的结果与之一致.对发酵后麦秸水浸提液的DGGE检测表明,维持反应器高有机负荷、低发酵液HRT,促进了厌氧微生物在麦秸表面定植,微生物种群数量和丰富度均明显高于低有机负荷、高发酵液HRT的处理,反应器耐高有机负荷冲击的能力增强.采用秸秆床反应器处理农村常见的秸秆和畜禽养殖污水产沼气是可行的,且较高的废水有机负荷有利于提高反应器容积产气率. 展开更多
关键词 猪场废水 秸秆床反应器 有机负荷 水力停留时间 沼气
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氧化亚铁硫杆菌分离复壮及固定化的研究 被引量:8
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作者 邸进申 赵新巧 耿冰 《微生物学报》 CAS CSCD 北大核心 2003年第4期487-491,共5页
用稀释涂布平板法从已退化的氧化亚铁硫杆菌 (Thiobacillusferrooxidans)菌液中分离出氧化活性较高、生命力强的氧化亚铁硫杆菌T1。以H 2软性填料作为氧化亚铁硫杆菌的固定化载体 ,构建了固定床生物反应器。考察了固定床生物反应器氧化F... 用稀释涂布平板法从已退化的氧化亚铁硫杆菌 (Thiobacillusferrooxidans)菌液中分离出氧化活性较高、生命力强的氧化亚铁硫杆菌T1。以H 2软性填料作为氧化亚铁硫杆菌的固定化载体 ,构建了固定床生物反应器。考察了固定床生物反应器氧化Fe2 + 的情况 :Fe2 + 最大氧化速率达 7 67g (L·h)。并对固定床生物反应器运行过程中在载体表面形成的沉淀物进行了研究 ,通过X衍射证明此沉淀物为黄钾铁矾 [KFe3(SO4 ) 2 (OH) 6 ]。 展开更多
关键词 氧化亚铁硫杆菌 分离 复壮 固定化 载体 固定床生物反应器
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丙酸杆菌的两种固定化细胞反应器发酵生产丙酸及其代谢通量分析 被引量:4
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作者 陈飞 冯小海 +2 位作者 吴波 李莎 徐虹 《化工学报》 EI CAS CSCD 北大核心 2011年第4期1034-1041,共8页
根据构建的费氏丙酸杆菌合成丙酸的生化反应网络,利用代谢通量分析法分析了课题组构建的两种固定化细胞反应器对丙酸发酵的影响。结果表明,固定化细胞发酵可以调节葡萄糖-6-磷酸、磷酸烯醇式丙酮酸和丙酮酸节点处的代谢通量分布,从而最... 根据构建的费氏丙酸杆菌合成丙酸的生化反应网络,利用代谢通量分析法分析了课题组构建的两种固定化细胞反应器对丙酸发酵的影响。结果表明,固定化细胞发酵可以调节葡萄糖-6-磷酸、磷酸烯醇式丙酮酸和丙酮酸节点处的代谢通量分布,从而最终影响生物量和各种有机酸的合成。与游离发酵相比,两种固定化发酵方式戊糖磷酸途径通量都有显著提高,乙酸和乳酸通量均有减少。与植物纤维床反应器主要靠直接加强丙酸合成途径使丙酸产率提高了242.72%不同,多点式棉纤维床反应器发酵主要是通过琥珀酸合成途径的增强而使丙酸产率提高了56.80%。比较了相关关键酶的比活,酶活变化与代谢通量结果基本一致。 展开更多
关键词 丙酸 植物纤维床反应器 多点式棉纤维床反应器 代谢通量分布
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增加内循环的生物反应器对啤酒废水处理效率的研究 被引量:6
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作者 张永明 俞俊棠 +1 位作者 王建龙 钱易 《环境科学学报》 CAS CSCD 北大核心 2000年第6期727-730,共4页
用生物流化床反应器和气提式接触氧化生物反应器处理啤酒废水时 ,分别从废水COD的降解速率和去除率考察了有、无内循环时 ,对啤酒废水降解效率的影响 .结果表明 ,增加内循环装置 ,可以强化气 -液传质 ,明显地提高啤酒废水处理的效率 .
关键词 生物反应器 啤酒废水 流化床 内循环 废水处理
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