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Effect of Using Various Cathode Materials (Carbon Felt, Ni-Co, Cu-B, and Cu-Ag) on the Operation of Microbial Fuel Cell 使用不同阴极材料(碳毡、镍-钴、铜-B 和铜-银)对微生物燃料电池运行的影响
Pub Date : 2024-02-01 DOI: 10.59440/ceer/183171
P. Włodarczyk, B. Włodarczyk
Wastewater has high potential as an energy source. Therefore, it is important to recover even the smallest part of this energy, e.g., in microbial fuel cells (MFCs). The obtained electricity production depends on the process rate of the electrodes. In MFC, the microorganisms are the catalyst of anode, and the cathode is usually made of carbon material. To increase the MFC efficiency it is necessary to search the new cathode materials. In this work, the electricity production from yeast wastewater in membrane-less microbial fuel cells with a carbon felt, Ni-Co, Cu-B, and Cu-Ag cathodes has been analyzed. In the first place, the measurements of the stationary potential of the electrodes (with Cu-Ag catalyst obtained by the electrochemical deposition technique) were performed. Next, the analysis of the electric energy production during the operation of the membrane-less microbial fuel cell (ML-MFC). The highest parameters were obtained for the Ni-Co and Cu-Ag catalysts. The cell voltage of 607 mV for Ni-Co and 605 mV for Cu-Ag was obtained. Additionally, the power of 4.29 mW for both cathodes - Ni-Co and Cu-Ag was obtained. Moreover, Ni-Co and Cu-Ag allow the shortest time of COD reduction. Based on the test results (with selected MFC design, wastewater, temperature, etc.), it can be concluded that of all the analyzed electrodes, Cu-Ag and Ni-Co electrodes have the best parameters for use as cathodes in ML-MFC. However, based on the results of this study, it can be concluded that all the tested electrodes can be used as cathode material in MFC.
废水作为一种能源具有很大的潜力。因此,即使是回收其中最小的一部分能量也非常重要,例如在微生物燃料电池(MFC)中。发电量取决于电极的处理速度。在 MFC 中,微生物是阳极的催化剂,阴极通常由碳材料制成。为了提高 MFC 的效率,有必要寻找新的阴极材料。本研究分析了无膜微生物燃料电池中使用碳毡、镍-钴、铜-B 和铜-银阴极从酵母废水中发电的情况。首先,测量了电极的静态电位(采用电化学沉积技术获得的铜银催化剂)。接着,分析了无膜微生物燃料电池(ML-MFC)运行期间的电能产生情况。Ni-Co 和 Cu-Ag 催化剂获得的参数最高。Ni-Co 和 Cu-Ag 催化剂的电池电压分别为 607 mV 和 605 mV。此外,Ni-Co 和 Cu-Ag 两种阴极的功率均为 4.29 mW。此外,镍-钴和铜-银的 COD 还原时间最短。根据测试结果(选定的 MFC 设计、废水、温度等),可以得出结论:在所有分析过的电极中,Cu-Ag 和 Ni-Co 电极的参数最适合用作 ML-MFC 的阴极。不过,根据这项研究的结果,可以得出结论:所有测试过的电极都可以用作 MFC 的阴极材料。
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引用次数: 0
Feeding a Membrane-less Microbial Fuel Cell by Mixed Municipal and Industrial Wastewater 用城市和工业混合废水为无膜微生物燃料电池提供原料
Pub Date : 2024-01-23 DOI: 10.59440/ceer/178189
B. Włodarczyk, P. Włodarczyk
Due to the constant growth of the world's population, the amount of generated wastewater is also constantly increasing. One of the devices that can use wastewater as a raw material for energy production is a microbial fuel cell (MFC). MFCs technology is constantly evolving. However, to increase its use, it is necessary to improve its efficiency. There are various possibilities to ensure this, such as the use of new electrode materials, new cell designs, or the use of wastewaters from different sources. In this paper the analysis of MFC operation (cell voltage, power, and current density) fed by mixed municipal and industrial wastewaters was shown. Moreover, the change in time of COD was analyzed. Due to cost reduction the membrane-less microbial fuel cell (ML-MFC) was chosen. It was noted that the addition of concentrated process wastewater increases the COD reduction time in the ML-MFC. An increase of generated bioelectricity during fed ML-MFC by mixed municipal and industrial (process wastewater from yeast production) wastewater was demonstrated. The highest values of average cell voltage (598 mV), maximum power (4.47 mW) and maximum current density (0.26 mA·cm-2) were obtained for a 10% share of yeast process wastewater in the mixed wastewater, which fed the ML-MFC.
由于世界人口的不断增长,产生的废水量也在不断增加。微生物燃料电池(MFC)是利用废水作为能源生产原料的设备之一。MFC 技术在不断发展。然而,要提高其使用率,就必须提高其效率。要做到这一点,有多种可能性,例如使用新的电极材料、新的电池设计或使用不同来源的废水。本文分析了以城市和工业混合废水为原料的 MFC 运行情况(电池电压、功率和电流密度)。此外,还分析了 COD 的时间变化。为了降低成本,选择了无膜微生物燃料电池(ML-MFC)。结果表明,添加浓缩工艺废水会延长 ML-MFC 的 COD 减排时间。在 ML-MFC 中加入城市和工业(酵母生产过程中产生的废水)混合废水后,所产生的生物电力有所增加。当混合废水中的酵母加工废水比例为 10%时,ML-MFC 的平均电池电压(598 mV)、最大功率(4.47 mW)和最大电流密度(0.26 mA-cm-2)均达到最高值。
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引用次数: 0
The Use of Phase Change Materials to Improve the External Walls' Thermal Parameters of Heated Buildings 使用相变材料改善供暖建筑外墙的热参数
Pub Date : 2024-01-23 DOI: 10.59440/ceer/177833
Magdalena Joanna Nakielska, Anna Kaczmarek
Currently, it is estimated that the construction sector consumes over 40% of the energy produced and about 50% of the mass of processed materials. As a consequence, there is a challenge to look for alternative material solutions allowing for the storage and conversion of energy. Phase change materials give us such opportunities. Their introduction leads to additional benefits related to thermal parameters. The work presents a short overview of PCMs along with the possibility of their application. Then, as part of the research, the selected phase change material was applied to the internal plaster layer of an external wall to check its activity. The obtained results were compared to the values of reference samples (without PCM). The proposed solution leads to the improvement of the analyzed partitions' thermal parameters.
据估计,目前建筑行业消耗的能源占生产总量的 40%以上,消耗的加工材料占总量的 50%左右。因此,寻找可存储和转换能源的替代材料解决方案是一项挑战。相变材料为我们提供了这样的机会。引入相变材料可带来与热参数相关的额外好处。本研究简要介绍了 PCM 及其应用的可能性。然后,作为研究的一部分,将选定的相变材料应用于外墙的内部抹灰层,以检查其活性。获得的结果与参考样本(不含 PCM)的值进行了比较。所提出的解决方案改善了所分析隔墙的热参数。
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引用次数: 0
Multi-Criteria Analysis and Design Ideas of Green Façade Systems as Eco-Friendly Architectural Solutions 作为生态友好型建筑解决方案的绿色外墙系统的多标准分析和设计思路
Pub Date : 2024-01-22 DOI: 10.59440/ceer/178257
Patrycja Kamińska, Hanna Michalak
The article discusses current trends in designing green and eco-friendly façades of buildings of different functions in Poland and around the world. Information collected on completed façade projects, associated research and conclusions formulated on the basis thereof, indicate trends and possibilities for the use of contemporary material solutions and technologies in designing various forms of vertical 'greenery’ which support sustainable development of urban areas. The main objective of the research was to identify the most important features of green façades as eco-friendly architectural solutions. A case study with descriptions of the features and qualitative elements of 100 of the most architecturally interesting buildings with characteristic external wall structures was constructed for research purposes. The sites selected for the case study represent a review of global trends. The data was then used for a multi-criteria analysis of green façade systems from the perspective of eco-friendly architectural solutions. The conducted research, analyses and discussions on solutions already in place were then implemented as guidelines for innovative architectural design solutions, which were presented at the Faculty of Architecture at Poznań University of Technology in the form of selected diagrams and student visualisations. These comprised highly aesthetic compositions, possible to implement in the near future.
文章讨论了波兰和世界各地不同功能建筑的绿色和生态友好外墙设计的当前趋势。所收集的有关已完成外墙项目的信息、相关研究以及在此基础上得出的结论,表明了在设计各种形式的垂直 "绿化 "以支持城市地区可持续发展方面,使用现代材料解决方案和技术的趋势和可能性。研究的主要目的是确定绿色立面作为生态友好型建筑解决方案的最重要特征。为了达到研究目的,我们进行了一项案例研究,描述了 100 幢最有趣的建筑的特征和定性要素,这些建筑的外墙结构各具特色。案例研究选择的地点代表了对全球趋势的回顾。这些数据随后被用于从生态友好型建筑解决方案的角度对绿色外墙系统进行多标准分析。对已有解决方案进行的研究、分析和讨论作为创新建筑设计解决方案的指导方针,以选定的图表和学生可视化作品的形式在波兹南理工大学建筑学院进行了展示。这些都是极具美感的作品,有可能在不久的将来付诸实施。
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引用次数: 0
Effect of temperature and Humidity on the Thermal Conductivity λ of Insulation Materials 温度和湿度对绝缘材料导热率 λ 的影响
Pub Date : 2024-01-22 DOI: 10.59440/ceer/178976
Weronika Kendzierawska, Maciej Trochonowicz
The aim of this article is to address the influence of air humidity and testing temperature on the thermal conductivity coefficient (λ) of various thermal insulation materials. This group includes wood-based materials, rock wools, heat-insulating renders, climate boards, and lightweight cellular concretes. These materials are used both indoors and outdoors in buildings. Over the course of several years, data were collected from laboratory tests to determine the thermal conductivity coefficient (λ) in relation to increases in temperature and humidity. The obtained results were compared with values provided by the manufacturers of the insulation materials. The aforementioned research was carried out due to the rather high sorption of most materials and thus the possibility of them becoming humid at high air humidity. Because of the very large difference in the thermal conductivity coefficient of water and air, a relatively small increase in the mass moisture content of the materials results in a loss of insulation.
本文旨在探讨空气湿度和测试温度对各种隔热材料导热系数(λ)的影响。这组材料包括木质材料、岩棉、隔热灰泥、气候板和轻质蜂窝混凝土。这些材料在建筑物的室内和室外都有使用。几年来,我们从实验室测试中收集数据,以确定导热系数 (λ)与温度和湿度升高的关系。所得结果与隔热材料制造商提供的数值进行了比较。进行上述研究的原因是,大多数材料的吸附性相当高,因此在空气湿度较高时可能会变得潮湿。由于水和空气的导热系数相差很大,因此材料的含水量相对较小的增加就会导致隔热性能下降。
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引用次数: 0
BIM Policy in Eastern Europe 东欧的 BIM 政策
Pub Date : 2024-01-12 DOI: 10.59440/ceer/177606
E. Mitera-Kiełbasa, Krzysztof Zima
The European Union in the Industry 5,0 proposal encourages technological transformation. ICT Information and Communications Technology, which for the AEC industry are BIM and Digital Twin is appreciated, but also innovative and variable over time. Therefore publications like this, which verify the validity of information are important. Global BIM policy analysis can be valuable for stakeholders of the investment process, policymakers, researchers. The authors performed a scientific analysis on an extensive database of articles (over 20,000) as well as national regulations (in non-English languages). BIM mandatory in public investments depicted on the map, also charts showing other indicators. In Eastern Europe has been observed a small scale (22%) of planned BIM requirements. Czech Republic plans BIM mandate on public investments for project above the EU threshold. The Polish road map proposes MacroBIM for risky or complicated, public investments with budget exceeding EUR 10 million since 2025 and for all since 2025. Comparing with other indicators the Czech Republic and Poland have high GDP per capita and percentage of the industrial sector (including construction) in GDP value added. Poland is classified also as a developed market within the global equity indices. This may have an impact on digital transformation, which is a demanding project due to investment costs. Bulgaria did not include a BIM mandate in its digital transformations plan. Due to the Industry 5,0 and the positive results from case studies of countries that have already applied BIM mandatory introducing BIM requirements in public procurements should be motivated and supported.
欧盟在 "工业 5.0 "提案中鼓励技术转型。信息和通信技术(ICT),即 BIM 和数字孪生技术(Digital Twin),对于 AEC 行业来说,既值得赞赏,又具有创新性和随时间变化的特点。因此,像这样验证信息有效性的出版物非常重要。全球 BIM 政策分析对投资过程中的利益相关者、政策制定者和研究人员都很有价值。作者对数据库中的大量文章(超过 20,000 篇)以及国家法规(非英语语言)进行了科学分析。BIM 在公共投资中的强制性在地图上有所描述,图表还显示了其他指标。据观察,东欧的 BIM 要求计划规模较小(22%)。捷克共和国计划对超过欧盟门槛的公共投资项目进行 BIM 授权。波兰的路线图建议自2025年起对预算超过1000万欧元的风险或复杂的公共投资项目实施MacroBIM,自2025年起对所有项目实施MacroBIM。与其他指标相比,捷克共和国和波兰的人均 GDP 和工业部门(包括建筑业)在 GDP 增加值中所占的比例较高。波兰在全球股票指数中也被列为发达市场。这可能会对数字化转型产生影响,因为数字化转型是一项要求很高的项目,投资成本也很高。保加利亚在其数字化转型计划中没有包括 BIM 任务。鉴于工业 5.0 以及已强制应用 BIM 的国家案例研究的积极成果,应鼓励和支持在公共采购中引入 BIM 要求。
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引用次数: 0
The Risk of Damage to Reailway Infrastructure Due to Theft and Devastation 因盗窃和破坏而对铁路基础设施造成损害的风险
Pub Date : 2023-12-18 DOI: 10.59440/ceer/176938
Filip Janowiec, Tomasz Kula
Theft and devastation of railway infrastructure are one of the most important factors that affect the safety of the railway transport system. In Poland, the railway transported 245.1 million passengers and 243.6 million tons of cargo in 2021, so it is extremely important to ensure the maximum possible safety standards. Theft and devastation of railway infrastructure contribute to significant material damage to railway network managers. The costs of rebuilding railway equipment are estimated at millions of zlotys every year. They also influence the proper functioning of railway traffic. Due to this phenomenon, there are delays of passenger and freight trains, the total of which amounted to over 100,000 minutes in 2021. Therefore, the effects of such hooligan acts also affect passengers and commercial customers of the railways. The article is an attempt to describe the impact of theft and devastation of railway infrastructure on its safety and the operation of railway lines in Poland. By analyzing the available statistical data and using the CSM method, as well as applying certain simplifications, it was possible to determine the approximate level of risk using techniques used in practice. Based on the adopted risk reference levels, a systematic reduction in both the probability of occurrence of negative phenomena and their consequences was observed.
盗窃和破坏铁路基础设施是影响铁路运输系统安全的最重要因素之一。2021 年,波兰的铁路旅客运输量为 2.451 亿人次,货物运输量为 2.436 亿吨,因此确保最大可能的安全标准极为重要。铁路基础设施的盗窃和破坏给铁路网络管理者造成了巨大的物质损失。据估计,每年重建铁路设备的费用高达数百万兹罗提。它们还影响铁路交通的正常运行。由于这种现象,客运和货运列车出现延误,2021 年延误总时长超过 10 万分钟。因此,这种流氓行为的影响也波及到铁路的乘客和商业客户。本文试图描述盗窃和破坏铁路基础设施对铁路安全和波兰铁路线运营的影响。通过分析现有的统计数据和使用 CSM 方法,并进行一定的简化,可以利用实践中使用的技术来确定大致的风险水平。根据所采用的风险参考水平,可以观察到负面现象发生的概率及其后果都在系统性地降低。
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引用次数: 0
Impermeability Evaluation Of Concrete With Fly Ash Aggregate And Prediction With Modelling 含粉煤灰骨料混凝土的抗渗性评估及模型预测
Pub Date : 2023-11-16 DOI: 10.59440/ceer/174681
G. Lalitha, Chilukala Ritvik Reddy
Concrete is the most synthesized material in construction sector which it has aggregate as one of its components. The use of natural aggregate in concrete preparation uses a significant amount of non-renewable resources and energy, having a significant environmental impact. Multiple research projects have been conducted to safeguard natural reserves, seeking a solution to the waste disposal issue, and reduce construction costs by utilizing waste materials. FA(Fly Ash) aggregate is one such material that can be a replacement for natural aggregate. Durability parameters of concrete with Fly Ash (FA) aggregate are studied in this work as an alternative for fine aggregate. In this study, 5 concrete mixes were prepared utilizing FA aggregate in percentage substitution of 0%, 10%, 20%, 30%, and 40% for each. The quantity of cement, compaction, curing rate, concrete cover, and porosity all influence the durability of the concrete. Concrete attributes such as strength in compression, retaliation to abrasion and half-cell potential were investigated. Durability parameters of the specimens were tested after 90-day curing. The results revealed that concrete with 30% FA aggregate had the highest compressive strength, improved resistance towards abrasion and least half cell potential values. Experimentation data were used to develop comprehensive prediction models by applying support vector machine (SVM) algorithm. The SVM model analyses R2 values with an accuracy of over 97%. As a result, we can use SVM to efficiently execute prediction modelling in construction area.
混凝土是建筑行业使用最多的合成材料,其成分之一就是骨料。在混凝土制备过程中使用天然骨料会消耗大量不可再生资源和能源,对环境造成严重影响。为了保护自然保护区,寻求废物处理问题的解决方案,以及通过利用废料降低建筑成本,已经开展了多个研究项目。FA(粉煤灰)骨料就是这样一种可以替代天然骨料的材料。本研究对使用粉煤灰(FA)骨料作为细骨料替代品的混凝土耐久性参数进行了研究。在这项研究中,使用粉煤灰骨料制备了 5 种混凝土混合料,每种混合料的替代率分别为 0%、10%、20%、30% 和 40%。水泥用量、压实度、养护率、混凝土覆盖率和孔隙率都会影响混凝土的耐久性。对混凝土的压缩强度、耐磨性和半电池电位等属性进行了研究。试样的耐久性参数在 90 天养护后进行了测试。结果显示,含 30% FA 骨料的混凝土抗压强度最高,耐磨性更好,半电池电位值最小。实验数据通过应用支持向量机(SVM)算法建立了综合预测模型。SVM 模型分析 R2 值的准确率超过 97%。因此,我们可以利用 SVM 在建筑领域有效地执行预测建模。
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引用次数: 0
Selected Thermal Waste Treatment Plants In Europe, Case Study 欧洲部分热能废物处理厂案例研究
Pub Date : 2023-11-16 DOI: 10.59440/ceer/175240
Dorota Olejnik, Marcin Krupa
The functioning of societies involves the generation of large amounts of municipal waste. This study analyses the amounts of pollutants emitted during waste incineration at selected waste incineration plants in 2022. Four plants were analyzed, including three with the highest waste processing efficiency (Copenhagen, Poznan and Kraków) and one with the lowest efficiency (Konin). The choice of the factory in Copenhagen was also dictated by its strategic location in the city center. Analysing the emissions from the selected plants it can be concluded that environmental safety was maintained and none of the plants exceeded the permissible emissions value.
社会的运转需要产生大量的城市垃圾。本研究分析了 2022 年部分垃圾焚烧厂在垃圾焚烧过程中排放的污染物数量。研究分析了四家工厂,包括三家垃圾处理效率最高的工厂(哥本哈根、波兹南和克拉科夫)和一家效率最低的工厂(科宁)。选择哥本哈根的工厂也是由于其位于市中心的战略位置。对所选工厂的排放量进行分析后得出的结论是,这些工厂都保持了环境安全,没有一家工厂的排放量超过允许值。
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引用次数: 0
Modeling of a Public Utility Facility from Total BIM Data 利用全面的 BIM 数据建立公共设施模型
Pub Date : 2023-11-15 DOI: 10.59440/ceer/175011
Anna Gardzińska
The purpose of this work is to present the possibilities of using tacheometric measurement technology in the development of a 3D geometric model of an existing building and the directions of using BIM technology in the process of building operation. General information on the development of BIM technology was presented, and issues related to the construction of 3D models were discussed. Attention was also drawn to the need to update the information assigned to the model on an ongoing basis in order to effectively manage the building. Supplementing the model with metadata regarding the building materials used will allow for a precise and quick analysis of all renovation assumptions. The created 3D model can be used to control the condition of structures or in safety and risk management.
这项工作的目的是介绍在开发现有建筑物的三维几何模型时使用测量技术的可能性,以及在建筑物运行过程中使用 BIM 技术的方向。作品介绍了 BIM 技术发展的一般信息,并讨论了与三维模型构建有关的问题。此外,还提请注意需要持续更新分配给模型的信息,以便有效管理建筑物。在模型中补充有关所用建筑材料的元数据,可以对所有翻新假设进行精确和快速的分析。创建的三维模型可用于控制结构状况或安全和风险管理。
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引用次数: 0
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Civil and Environmental Engineering Reports
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