Biochar-alginate jointly immobilized Chlorella vulgaris in cathode enhanced power generation in photo microbial fuel cells

IF 4.6 2区生物学 Q1 BIOTECHNOLOGY & APPLIED MICROBIOLOGY Algal Research-Biomass Biofuels and Bioproducts Pub Date : 2024-09-16 DOI:10.1016/j.algal.2024.103714

Yicheng Wu , Yeling Zhou , Fuda Chen , Haiyan Fu , Yong Xiao , Zejie Wang

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Abstract

The present research investigated for the first time the performance of photo microbial fuel cells (photo-MFCs) with biochar-alginate joint immobilized Chlorella vulgaris (BAJIC) as a cathodic microorganism. The results showed the stabilized voltage output reach 0.182 V in photo-MFCs with BAJIC, which is 61.1 % higher than that of the alginate immobilized C. vulgaris and 2.43 times that of suspended C. vulgaris. Light intensity affected both the cathodic potential and internal resistance of the photo-MFCs with BAJIC. The cathodic potential increased from −0.258 to −0.173 V (vs. Ag/AgCl) when the light intensity was increased from 1500 to 2500 lx. Meanwhile, the internal resistance decreased from 583.88 to 392.51 Ω. The results also showed that BAJIC with the smaller bead diameter generated larger voltage. BAJIC dosage affected the voltage of the increasing stage, while did not influence the stable voltage. This work demonstrated that biochar, as an efficient additive to the alginate immobilized microalgae beads, can boost the performance of microalgae matrix, and thus provide an economical and effective approach to enhance the efficiency of photo-MFCs.

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生物炭-海藻酸盐联合固定化小球藻在光微生物燃料电池阴极增强发电中的应用

本研究首次研究了以生物炭-海藻酸盐联合固定的小球藻（BAJIC）为阴极微生物的光微生物燃料电池（photo-MFCs）的性能。结果表明，使用 BAJIC 的光 MFC 的稳定电压输出达到 0.182 V，比海藻酸盐固定的绿藻高 61.1%，是悬浮绿藻的 2.43 倍。光照强度对带有 BAJIC 的光 MFC 的阴极电位和内阻都有影响。当光照强度从 1500 lx 增加到 2500 lx 时，阴极电位从-0.258 V 增加到-0.173 V（相对于 Ag/AgCl）。结果还显示，珠径越小的 BAJIC 产生的电压越大。BAJIC 的用量会影响上升阶段的电压，但不会影响稳定电压。这项研究表明，生物炭作为海藻酸盐固定化微藻珠的有效添加剂，可以提高微藻基质的性能，从而为提高光 MFC 的效率提供了一种经济有效的方法。

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来源期刊

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