Abstract：
Biophotovoltaic (BPV) devices are a potential decentralized and environmentally friendly energy source that harness solar energy through photosynthesis. BPV devices are self-regenerating, promising long-term usability. A practical strategy for enhancing BPV performance is to systematically screen for highly exoelectrogenic algal strains capable of generating large electric current density. In this study, a previously uncharacterized green algal strain - Parachlorella kessleri MACC-38 was found to generate over 340 µA mg-1 Chl cm-2. This output is approximately ten-fold higher than those of Chlamydomonas reinhardtii and Chlorella species. The current production of MACC-38 primarily originates from photosynthesis, and the strain maintains its physiological integrity throughout the process. MACC-38 exhibits unique traits such as low extracellular O2 and Fe(III) reduction, substantial copper (II) reduction, and significant extracellular acidification during current generation, contributing to its high productivity. The exoelectrogenic and growth characteristics of MACC-38 suggest that it could markedly boost BPV efficiency.
摘要：
生物光伏（BPV）是一种潜在的分散和环境友好的能源，通过光合作用利用太阳能。这些BPV设备可以自我再生，有前途的长期可用性。用于增强BPV性能的实际策略是系统地筛选能够产生大电流密度的高外电藻株。在这项研究中,先前未表征的绿藻菌株-ParachlorellakessleriMACC-38被发现产生超过340µAmg-1Chlcm-2。该产量比莱茵衣藻和小球藻的产量高约十倍。目前生产的MACC-38主要来源于光合作用，并且菌株在整个过程中保持其生理完整性。MACC-38表现出独特的特性，如低细胞外O2和Fe（III）还原，大量铜(II)还原，以及当前生产过程中显著的细胞外酸化，有助于其高生产率。MACC-38的外生电和生长特性表明它可以显着提高BPV效率。
