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研究了微生物燃料电池处理OCC制浆废水及同步产电性能,为全面了解实验室研究与实际应用之间的差距,选用自制的和纸厂的两种OCC制浆废水进行比较分析。研究结果表明,阳极室进水为纸厂废水的反应体系在有机物去除及产电方面优于自制废水体系,反应器运行结束时自制废水和纸厂废水的COD_(Cr)去除率分别为81.3%和89.5%;自制废水体系于3个产电平台产生的输出电压分别低于纸厂废水体系,进水COD_(Cr)浓度为1000 mg/L时,两个体系得到的最大功率密度分别为289.9 mW/m~2和303.0 mW/m~2。通过扫描电子显微镜和傅里叶红外光谱分析可知,自制废水体系和纸厂废水体系中阳极优势菌群的表面形态不同,且红外谱图在吸收峰的数量及特定峰的强度上存在差异。 相似文献
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以化学热磨机械浆(CTMP)制浆废水为底物,采用铁氰化钾阴极微生物燃料电池(MFC),对MFC处理CTMP制浆废水的可行性和废水CODCr浓度对MFC产电性能的影响进行研究.结果表明,MFC最大功率密度随废水CODCr浓度的增大而升高,最高为233 mW/m2,CODCr去除率达到54.3%~ 62.4%;当CODCr增大至5200 mg/L以上时,过高的CODCr浓度抑制微生物活性,电池最大功率密度和CODCr去除率分别降低至34.2 mW/m2和32.8%.CTMP制浆废水可以作为MFC底物,在产电的同时实现有效降解,这为废水资源化利用提供了新途径. 相似文献
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微生物燃料电池(MFC)最具应用前景之一是处理废水的同时能够产生电能。以糖蜜废水作为阳极基质,以金属离子的电镀废水做阴极溶液,研究了双室微生物燃料电池不同电极面积对产电性能和COD的影响。结果发现,当外电阻为300Q时,大反应器微生物燃料电池A.(阳极面积为78.15cm^2)及小反应器微生物燃料电池~(阳极面积为76.8cm^2)最大功率密度分别为0.28mW/cm^2和0.22mW/cm^2。在前200个小时内,A:电池在第60个小时时产生最大电压71.1mV和最大电流189.5μA,A,在第190个小时时产生最大电压81.1mV和最大电流228.1μA。同时,当Zn^2+作阴极溶液时,小反应器微生物燃料电池阳极溶液的COD去除率在1.5%到7.02%之间,大反应器微生物燃料电池阳极溶液的COD去除率在0到14.96%之间。阴极中Zn^2+去除率A1中为28.6%,A2为21.2%。 相似文献
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生物被膜的形成给食品安全造成了巨大的影响,严重威胁到人们的身体健康,是全球公认的食品安全危害之一。抗生物被膜材料具有降低微生物危害、减少食品生产及加工过程中交叉污染等优点,已逐渐应用于食品微生物安全领域。基于此,本文首先概述了抗生物被膜材料的定义及制备方法,根据活性物质的种类对抗生物被膜材料进行了详细的分类,并进一步描述了抗生物被膜材料在食品工业的应用现状,最后对抗被膜材料的未来发展进行了展望。本文可为抗生物被膜材料的进一步研究提供理论参考,以促进此类材料在食品微生物安全领域的应用,并为保障食品安全与人类健康提供有效的技术策略。 相似文献
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背压发电与凝汽式发电机组相比具有特殊性。介绍了背压发电的供电、同期、解列、保护、励磁及汽轮机与发电机的联锁方面的特殊性和实施方法。 相似文献
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成鸿博 《皮革制作与环保科技》2022,3(1):152-154
现如今,社会经济日新月异,人们的生活质量持续提升,各行各业方兴未艾,对电能需求日渐增加,各种新的发电技术屡见不鲜。垃圾焚烧发电是社会发展的关键产物,利用垃圾焚烧发电,可以有效防止垃圾外溢,实现垃圾资源的循环利用和无害化利用。然而,垃圾焚烧发电在具体应用中还存在一些问题,所以,文章对我国垃圾焚烧发电行业的发展前景做了详细论述,旨在可以为相关业界人士提供有价值的借鉴与参考,进而为行业的健康可持续繁荣发展贡献力量。 相似文献
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Ahoefa Agbagla‐Dohnani Agns Cornu Pierre Nozire Jean‐Michel Besle Jean‐Pierre Dulphy Michel Doreau Elisabeth Grenet 《Journal of the science of food and agriculture》2003,83(5):383-394
The chemical composition, intake, digestibility, ultrastructure and microbial degradation of rice straw from Camargue were compared with barley straw. These variables were observed in two different herbivore digestive ecosystems: the sheep rumen and the donkey caecum. The two straws differed essentially in their ash content, which was three times higher in rice, owing to its silica content. Other chemical components were comparable, except a higher phenolic acids‐to‐lignin ratio in rice. Rice straw was better ingested than barley straw. Organic matter and neutral detergent fibre digestibilities were the same in both straws. Dry matter and cell wall disappearances could be adjusted to the exponential modelling equation with lag time, and differed between animals but not between straws. The sheep rumen had a higher extent of degradation, but the donkey caecum had a higher degradation rate. Statistical analysis revealed that cell‐wall components degradation was similar in the two straws except for ferulic acid, which was more degraded in rice straw. Scanning electron microscopy showed important differences in parenchyma degradation, which was much more effective in rice. Copyright © 2003 Society of Chemical Industry 相似文献
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Edgar Ugarte-Romero Hao Feng Scott E. Martin Keith R. Cadwallader Scott J. Robinson 《Journal of food science》2006,71(2):E102-E108
The use of acoustic energy to secure apple cider safety was explored. Inactivation tests were performed with Escherichia coli K12 at 40 °C, 45 °C, 50 °C, 55 °C, and 60 °C with and without ultrasound, followed by a validation test with E. coli O157:H7 at 60 °C. The cell morphology was observed with environmental scanning electron microscopy for samples treated at 40 °C and 60 °C. Physical quality attributes of the apple cider (pH, titratable acidity, °Brix, turbidity, and color) were compared for treated samples. The inactivation tests showed that sonication increased E. coli K12 cell destruction by 5.3‐log, 5.0‐log, and 0.1‐log cycles at 40 °C, 50 °C, and 60 °C, respectively. The additional destruction due to sonication was more pronounced at sublethal temperatures. At the lethal temperature of 60 °C, the rate of death by ultrasound was not significantly different compared with the thermal‐alone treatment. The inactivation of E. coli K12 with heat was described by 1st‐order kinetics, especially at 50 °C and 60 °C. For ultrasound treatments, concave upward survival curves were observed, which had a shape factor in the range of 0.547 to 0.720 for a Weibull distribution model. Extensive damage for ultrasound treated E. coli K12 cells, including cell perforation, was observed. Perforation is a unique phenomenon found on ultrasound‐treated cells that could be caused by liquid jets generated by cavitation. Titratable acidity, pH, and °Brix of the cider were not affected by ultrasound treatment. Minor changes in color and turbidity for ultrasound treated samples, especially for sonication at 40 °C for 17.7 min, were observed. 相似文献
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微生物酶解破壁提制葛根黄酮的工艺 总被引:2,自引:0,他引:2
采用生物酶促发酵降解葛根废渣的植物组织,有效提取葛根黄酮,通过高效液相色谱法测定黄酮的含量,优选出发酵菌种,对比葛渣不同处理方式,对接种量、培养基质和不同工艺参数等进行优化,并采用超声波萃取得到葛根黄酮粗品。结果表明:黑曲霉好氧发酵处理葛根废渣3.5g、添加辅料豆粕1.0g、葛根废渣质量与水的体积比1:20(g/mL)、黑曲霉接入量5%、pH5、在30℃发酵60h,测得葛根黄酮含量为3.769μg/mL;经超声波协同处理5min 后,葛根黄酮质量浓度为5.204μg/mL,经分离、蒸馏后获得葛根黄酮粗品2.974mg/g。 相似文献