Effect of increased temperature on halocarbon emission and bioelectricity generation by Synechococcus sp. UMACC 371 in a biophotovoltaics device

IF 4.5 2区 生物学 Q1 BIOTECHNOLOGY & APPLIED MICROBIOLOGY
Jing-Ye Tee , Fiona Seh-Lin Keng , Fong-Lee Ng , Gill Malin , Choon-Weng Lee , Siew-Moi Phang
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Abstract

As interest in utilizing microalgae for biophotovoltaics (BPV) grows, assessing the environmental impacts, especially under varying temperatures, becomes crucial. This study examines how temperatures from 25 to 37 °C affect halocarbons emissions and bioelectricity generation by Synechococcus sp. UMACC 371 in a BPV device. Six halocarbons were investigated, with highest emission rates observed for CH3I (49.63 pmol mg−1 day−1) and CHBr3 (65.39 pmol mg−1 day−1). Emissions of iodinated compounds (CH3I, CH2I2) increased at 37 °C and were positively correlated with temperature (r = 0.703 to 0.746, p < 0.01). Lower Fv/Fm value and negative correlations between emissions and Fv/Fm suggest that cell stress increases emissions. CHBr3 and CHBr2Cl emissions were higher at lower temperatures and negatively correlated with temperature (r = −0.627 to −0.912, p < 0.01). Higher Fv/Fm at lower temperatures suggests these emissions were enhanced under optimal conditions rather than temperature stress. The highest specific growth rate and chlorophyll-a content at 37 °C, contributed to the highest power density of 3.94 mW m−2. While temperature showed little correlation with normalized power output, a positive correlation between normalized power density and CH2I2 emission suggests an indirect link. Further studies are needed to understand the connection between halocarbon emissions and bioelectricity generation in BPV. This study reveals that temperature fluctuations affect halocarbon emissions and bioelectricity generation from Synechococcus sp. UMACC 371, addressing the effects of varying temperatures on these processes in tropical microalgae. This is particularly relevant considering the potential widespread deployment of microalgae-based BPV devices in outdoor environments.
温度升高对聚球菌UMACC 371在生物光伏装置中卤碳排放和生物发电的影响
随着人们对利用微藻进行生物光伏发电(BPV)的兴趣的增长,评估其对环境的影响,特别是在不同温度下的影响,变得至关重要。本研究考察了25至37℃的温度如何影响聚球菌(Synechococcus sp. UMACC 371)在BPV装置中的卤代碳排放和生物发电。研究了6种卤代烃,其中CH3I (49.63 pmol mg−1 day−1)和CHBr3 (65.39 pmol mg−1 day−1)的排放率最高。37°C时,含碘化合物(CH3I, CH2I2)的排放量增加,且与温度呈正相关(r = 0.703 ~ 0.746, p < 0.01)。较低的Fv/Fm值和排放量与Fv/Fm之间的负相关表明细胞应激增加了排放量。CHBr3和CHBr2Cl的排放量在较低温度下较高,且与温度呈负相关(r = - 0.627 ~ - 0.912, p < 0.01)。较低温度下较高的Fv/Fm表明,这些排放物是在最佳条件下而不是在温度应力下增加的。37°C时的特定生长率和叶绿素a含量最高,功率密度为3.94 mW m−2。虽然温度与归一化功率输出的相关性不大,但归一化功率密度与CH2I2发射之间的正相关表明存在间接联系。需要进一步研究以了解卤代烃排放与BPV生物发电之间的联系。本研究揭示了温度波动影响聚球菌(Synechococcus sp. UMACC 371)的盐碳排放和生物发电,解决了温度变化对热带微藻这些过程的影响。考虑到户外环境中基于微藻的BPV设备的潜在广泛部署,这一点尤为重要。
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来源期刊
Algal Research-Biomass Biofuels and Bioproducts
Algal Research-Biomass Biofuels and Bioproducts BIOTECHNOLOGY & APPLIED MICROBIOLOGY-
CiteScore
9.40
自引率
7.80%
发文量
332
期刊介绍: Algal Research is an international phycology journal covering all areas of emerging technologies in algae biology, biomass production, cultivation, harvesting, extraction, bioproducts, biorefinery, engineering, and econometrics. Algae is defined to include cyanobacteria, microalgae, and protists and symbionts of interest in biotechnology. The journal publishes original research and reviews for the following scope: algal biology, including but not exclusive to: phylogeny, biodiversity, molecular traits, metabolic regulation, and genetic engineering, algal cultivation, e.g. phototrophic systems, heterotrophic systems, and mixotrophic systems, algal harvesting and extraction systems, biotechnology to convert algal biomass and components into biofuels and bioproducts, e.g., nutraceuticals, pharmaceuticals, animal feed, plastics, etc. algal products and their economic assessment
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