共查询到19条相似文献,搜索用时 46 毫秒
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阴极催化剂对微生物燃料电池性能的影响 《燃料化学学报》2017,45(10):1275-1280
以不同载量的MnO_2/rGO和Pt/C修饰阴极电极构建了生物阴极型双室微生物燃料电池(MFC),考察了不同阴极催化剂修饰MFC对其产电性能以及老龄垃圾渗滤液主要污染物去除效果的影响。结果表明,以MnO_2/rGO修饰MFC阴极电极材料,能显著提高MFC产电性能及对老龄垃圾渗滤液中污染物去除效果;输出电压为372 mV,功率密度为194 mW/m~3(是未经催化剂修饰MFC的两倍),内阻为264Ω,化学需氧量(COD)和氨氮(NH_3-N)去除率分别为58.68%和76.64%。当MnO_2/rGO载量为.0 mg/cm~2时,MFC性能与负载Pt/C的MFC性能接近,但构建成本却明显降低。 相似文献
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构建了一个以曝气池污泥为阳极接种微生物、碳毡为阳极、无任何修饰的不锈钢网为阴极的双室微生物燃料电池. 通过输出电压、功率密度以及电化学阻抗等考察了阴极面积对电池产电性能的影响,并对电池的长期运行稳定性进行评价. 研究结果表明,不锈钢网作为微生物燃料电池的阴极性能稳定. 当不锈钢网面积为2 × 2 cm2时,最大输出电压达到0.411 V,功率密度为0.303 W•m-2,内阻841 Ω,极化内阻80 Ω. 增大阴极面积至2 × 4 cm2,最大输出电压能达到0.499 V,内阻减小至793 Ω. 不锈钢网价格便宜,具有长期运行稳定性,适宜做MFCs的阴极. 相似文献
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双极室联合处理啤酒废水的微生物燃料电池 总被引:1,自引:0,他引:1
构建了双极室连续流联合处理废水的微生物燃料电池(MFC), 该MFC阳极室的出水直接用于阴极室的进水, 利用阴极室的好氧微生物进一步降解有机物. 以啤酒废水作底物, 研究了该MFC的产电性能和废水处理效果. 结果表明, 采用双极室连续流MFC可以大大提高废水的处理效果, 对啤酒废水化学需氧量(COD)的总去除率可达92.2%~95.1%, 其中阳极室中COD去除率为47.6%~56.5%. MFC的开路电压为0.451 V, 最大输出功率为2.89 W/m3. 实验中抑制MFC性能的主要因素是阴极的极化损失, 通过降低进入阴极室溶液的COD浓度、采用优质的阴极材料和加大阴极室内的曝气量等方法进一步优化电池的性能. 相似文献
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微生物燃料电池生物阴极 总被引:1,自引:0,他引:1
微生物燃料电池(microbial fuel cells, MFCs)利用微生物处理废水的同时产电,是一种清洁可再生能源技术。近年来新兴起的生物阴极是指阴极室中的功能微生物附着在电极表面形成生物膜,电子由电极传递给微生物并发生相应的生物电化学反应;是微生物燃料电池研究的一个重要方向。本文根据厌氧、好氧操作体系的不同将生物阴极进行分类;归纳总结了微生物组成、电极和分隔材料的研究进展,探讨了生物阴极在去除污染物和生成高附加值产品中的实际应用,并提出了其将来发展的可能方向。 相似文献
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生物阴极微生物燃料电池 总被引:3,自引:0,他引:3
传统微生物燃料电池(microbial fuel cells,MFCs)主要由生物阳极与非生物阴极组成,属于半生物燃料电池,存在化学药剂再生困难、需要铂等贵金属催化及成本高等缺陷。生物阴极则利用微生物参与阴极反应克服了这些缺陷。微生物参与MFCs阴极反应,最初在海底沉积物MFCs中被发现。为了提高空气-生物阴极的产电效率,人们进行了以铁、锰等过渡金属氧化物修饰电极材料的研究。在厌/缺氧环境中,生物阴极可将硝酸盐和硫酸盐等作为最终电子受体。对生物阴极研究的深入为MFCs工业化应用开辟了道路,此外,本文在文献综述的基础上提出了铁锰联合修饰生物阴极材料的可能性。 相似文献
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随着经济的飞速发展,社会对能源的需求日益扩大,对工业废水的无害化处理也提出了更高的要求。光催化燃料电池 (photocatalytic fuel cell, PFC) 在燃料电池中引入半导体光催化材料作为电极,实现了有机污染物高效降解和同步对外产电的双重功能,在废水无害化与资源化利用方面具有潜在的应用价值。半导体光催化电极是PFC系统高效运行的核心组件,增强其可见光响应和光生载流子分离是提高PFC性能的关键策略。反应器结构设计和运行参数优化也有利于改善PFC性能。本文从PFC基本原理和应用入手,综述了PFC在环境污染物资源化处理中的研究进展,并详细阐述了提高PFC的污染控制性能和产电效率的优化手段,为进一步设计高效稳定的PFC系统并实现其在水污染控制和清洁能源生产中的应用提供理论指导。 相似文献
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电化学法改性阳极对MFC性能的影响 《燃料化学学报》2016,44(5):628-633
采用不同质量分数的NH_4NO_3和(NH_4)_2S_2O_8溶液作为电解液,对双室微生物燃料电池的阳极炭布进行改性。以餐厨废水作为阳极底物,以K_3[Fe(CN)_6]和NaCl混合溶液为阴极液,考察不同电解液改性阳极条件下微生物燃料电池的产电性能及污水处理效果。结果表明,采用NH_4NO_3或(NH_4)_2S_2O_8改性炭布作为阳极的微生物燃料电池的发电性能和水处理效果均有改善。其中,采用质量分数为4%的(NH_4)_2S_2O_8溶液作为阳极改性电解液时,微生物燃料电池系统的产电性能达到最佳,其稳态电流密度约为60 m A/m~2,COD去除率约为42.5%。 相似文献
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Optimization of double chamber microbial fuel cell for domestic wastewater treatment electricity production 《燃料化学学报》2015,43(9):1092-1099
Microbial fuel cells (MFCs) represent a new approach for treating waste water along with electricity production. The present study addressed electricity production from domestic wastewater using a mediator-less double chamber MFC. The electricity production was monitored under different operational conditions for both summer and winter samples. Optimization of the anodic and cathodic chambers resulted in a maximal current of 0.784 and 0.645 mA with the maximal power intensity of 209 and 117 mW/m2 in power duration of 24 h for the summer and winter samples, respectively. Scanning electron microscopy showed that the bacterial biofilm formation on the anode was denser for the summer sample than that when the winter sample was used, so was the total bacterial count. Therefore, samples taken during summer were considered better in electricity production and waste water treatment than those taken during winter basically because of the high microbial load during the hot season. In parallel, there was a decrease in both biological oxygen demand (BOD5) and chemical oxygen demand (COD) values which reached 71.8% and 72.85%, respectively at the end of the operation process for the summer sample, while there was no evident decrease for the winter sample. Optimizing the operating conditions not only increased the potential of using domestic waste water in microbial fuel cells to produce electricity, but also improved the quality of the domestic waste water. 相似文献
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电极面积对老龄垃圾渗滤液为底物的微生物燃料电池性能影响 《燃料化学学报》2015,43(8):1011-1017
构建生物阴极型双室微生物燃料电池,处理老龄垃圾渗滤液。研究了阳极与阴极面积比值对微生物燃料电池产电能力和对老龄垃圾渗滤液处理效果的影响。结果表明,阳极与阴极面积比为1:2、2:2、2:1的3组生物阴极型微生物燃料电池输出电压分别为408、452、396mV,最大电功率密度分别为145.73、237.65、136.50mW/m3,内阻分别为350、200、400Ω,COD的去除率分别为21.18%、20.20%、22.31%。3组微生物燃料电池运行30d后,垃圾渗滤液中氨氮、硝酸盐氮、亚硝酸盐氮浓度均下降,其中,氨氮去除率分别为80.88%、73.61%和66.17%,其去除效果与产电性能相关。 相似文献
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研究不同污泥热水解时间下水解液特性及其对微生物燃料电池(MFC)产电的影响.水解时间由2 h增至96 h,水解液pH基本稳定于7.4 ~ 8.0;水解时间增加,其电导率逐渐提高至2.53 mS·cm-1,COD浓度和碱度也不断增加,水解液的缓冲能力不断得到提高.MFC最大功率密度达到25 W·m-3,COD去除率呈现先增后降,水解6 h时达到最大(47%);库仑效率在预水解4 h时达到最高(71%).阳极室pH下降可归因于NH4+、Na+、Ca2+、Mg2+等阳离子迁移,其中NH4+的迁移量最大. 相似文献
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共基质改善MFC处理链霉素废水及产电性能的研究 《燃料化学学报》2017,45(3):370-377
以K_3[Fe(CN)_6]和NaCl混合溶液为阴极液,以驯化的人工湖泊底泥为微生物菌种,以链霉素废水为阳极液,构建微生物燃料电池实验系统,研究添加共基质前后微生物燃料电池的废水处理效果与同步发电性能。结果表明,以链霉素废水为阳极液的微生物燃料电池的产电能力及废水处理效果均较差,并且随着链霉素浓度的增大而进一步恶化;但将葡萄糖作为共基质添加至阳极链霉素废水后,微生物燃料电池的产电能力和废水处理效果均显著提高。链霉素浓度为50 mg/L时,未添加共基质的微生物燃料电池处理链霉素废水的COD去除率为52%,产电电流密度为25 m A/m~2,输出电压为4.72 m V;添加共基质后,COD去除率为92%,稳态产电电流密度为300 m A/m~2,稳态输出电压为54 m V。 相似文献
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《中国化学会会志》2017,64(6):618-626
Swine wastewater has a high concentration of organic matter, suspended solids, and higher ammonia nitrogen, odor, complex polluting ingredients, and large emissions. A two‐chambered cubic microbial fuel cell (MFC) was used to evaluate the effect of a novel three‐dimensional (3D ) electrode made of 3D iron composites and 3D stainless composites on the electricity generation. Swine wastewater with a total chemical oxygen demand (TCOD ) of 3688 ± 300 mg/L was used as the feedstock in the anode chamber. The MFC reactor was incubated with an initial pH of 7.0 in an air shaker with a temperature of ~35°C and 100 rpm in the fed‐batch mode. A fixed external resistance (R ) of 100 Ω was connected between the electrodes, and the closed‐circuit potentials of the MFCs were recorded every 5 min. The results showed that using an iron–carbon fiber composite 3D electrode resulted in a peak electricity generation of 321 mV on the first 2 days and maintained a stable voltage of 163 mV during the second to sixth days. The COD removal efficiency could reach 75%. Using a stainless–carbon fiber 3D electrode could generate a peak voltage of only 29.5 mV and a stable voltage of 15.2 mV with a COD removal efficiency of 54%. 相似文献
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Rojas-Flores Segundo Magaly De La Cruz-Noriega Nlida Milly Otiniano Santiago M. Benites Mario Esparza Renny Nazario-Naveda 《Molecules (Basel, Switzerland)》2022,27(3)
The enormous environmental problems that arise from organic waste have increased due to the significant population increase worldwide. Microbial fuel cells provide a novel solution for the use of waste as fuel for electricity generation. In this investigation, onion waste was used, and managed to generate maximum peaks of 4.459 ± 0.0608 mA and 0.991 ± 0.02 V of current and voltage, respectively. The conductivity values increased rapidly to 179,987 ± 2859 mS/cm, while the optimal pH in which the most significant current was generated was 6968 ± 0.286, and the ° Brix values decreased rapidly due to the degradation of organic matter. The microbial fuel cells showed a low internal resistance (154,389 ± 5228 Ω), with a power density of 595.69 ± 15.05 mW/cm2 at a current density of 6.02 A/cm2; these values are higher than those reported by other authors in the literature. The diffractogram spectra of the onion debris from FTIR show a decrease in the most intense peaks, compared to the initial ones with the final ones. It was possible to identify the species Pseudomona eruginosa, Acinetobacter bereziniae, Stenotrophomonas maltophilia, and Yarrowia lipolytica adhered to the anode electrode at the end of the monitoring using the molecular technique. 相似文献