Vicerrectorado de Investigación, Universidad Autónoma del Perú, Lima 15842, Peru.
Grupo de Investigación en Ciencias Aplicadas y Nuevas Tecnologías, Universidad Privada del Norte, Trujillo 13007, Peru.
Molecules. 2022 Aug 15;27(16):5198. doi: 10.3390/molecules27165198.
The accelerated increase in energy consumption by human activity has generated an increase in the search for new energies that do not pollute the environment, due to this, microbial fuel cells are shown as a promising technology. The objective of this research was to observe the influence on the generation of bioelectricity of sucrose, with different percentages (0%, 5%, 10% and 20%), in papaya waste using microbial fuel cells (MFCs). It was possible to generate voltage and current peaks of 0.955 V and 5.079 mA for the cell with 20% sucrose, which operated at an optimal pH of 4.98 on day fifteen. In the same way, the internal resistance values of all the cells were influenced by the increase in sucrose, showing that the cell without sucrose was 0.1952 ± 0.00214 KΩ and with 20% it was 0.044306 ± 0.0014 KΩ. The maximum power density was 583.09 mW/cm at a current density of 407.13 A/cm and with a peak voltage of 910.94 mV, while phenolic compounds are the ones with the greatest presence in the FTIR (Fourier transform infrared spectroscopy) absorbance spectrum. We were able to molecularly identify the species Achromobacter xylosoxidans (99.32%), Acinetobacter bereziniae (99.93%) and Stenotrophomonas maltophilia (100%) present in the anode electrode of the MFCs. This research gives a novel use for sucrose to increase the energy values in a microbial fuel cell, improving the existing ones and generating a novel way of generating electricity that is friendly to the environment.
人类活动导致能源消耗加速增长，这促使人们寻找新的、不会污染环境的能源，因此微生物燃料电池被认为是一种很有前途的技术。本研究的目的是观察不同浓度（0%、5%、10%和 20%）蔗糖对利用微生物燃料电池（MFC）处理木瓜废料产生生物电能的影响。在最佳 pH 值为 4.98 的情况下，在第 15 天，20%蔗糖的电池产生了 0.955V 和 5.079mA 的电压和电流峰值。同样，所有电池的内阻都受到蔗糖增加的影响，显示不含蔗糖的电池为 0.1952±0.00214KΩ，而含 20%蔗糖的电池为 0.044306±0.0014KΩ。最大功率密度为 583.09mW/cm，电流密度为 407.13A/cm，峰值电压为 910.94mV，而酚类化合物在傅里叶变换红外（FTIR）吸收光谱中具有最大的存在。我们能够通过分子鉴定出在 MFC 阳极电极中存在的木糖氧化无色杆菌（99.32%）、贝日阿托氏菌（99.93%）和嗜麦芽寡养单胞菌（100%）。本研究为蔗糖在微生物燃料电池中增加能量值提供了新的用途，改善了现有技术，并产生了一种对环境友好的新型发电方式。
