The interaction between the photo-induced charges from photo nanocatalysts (PNCs) and biohydrogen production strains plays a key role in controlling the metabolism mechanism in fermentative biohydrogen production from lignocellulosic biomass wastes. Thus, in the present study, two strains of (PNSB) and a mixed consortium of HAU-M1 were evaluated for their biohydrogen production potential from corn stover (CS), whereas metabolism was catalyzed through photo-induced electrons from magnetic PNCs of cobalt ferrite (CoFeO). The threshold concentration of CoFeO (400 mg/L) produced 428.62 mL and 373.30 mL biohydrogen in PNSB and HAU-M1, which is 129.0 % and 81.12 % higher as compared to respective control groups (CGs), respectively. The presence of PNCs provides the photo-induced electrons, which catalyze the metabolic processes as butyric acid increases by 96.29 % and 94.87 % in PNSB and HAU-M1, respectively, hence increasing hydrogen production. The results were supported by microbial community investigation, which showed that the incorporation of the appropriate concentration of PNCs effectively changes the bacterial community dynamics and diversifies the phyla (, , and ) and hydrogen-producing genus . The recovered yield of CoFeO PNCs from PNSB and HAU-M1 fermentative mediums in three consecutive cycles was (90.87 %, 88.94 %), (80.25 %, 72.25 %), and (69.75 %, 60.80 %) respectively showing potential for recycling catalysts during the fermentation process. Thus, selecting the right photocatalysts and strain can affect metabolism and biohydrogen production, while recyclability reduces environmental leaching.

中文翻译：

---

通过 CoFe2O4 磁性光催化剂催化代谢进行光发酵生物氢生产：不同菌株的选择性和可回收性


光纳米催化剂（PNC）的光生电荷与生物制氢菌株之间的相互作用在控制木质纤维素生物质废物发酵生物制氢的代谢机制中发挥着关键作用。因此，在本研究中，评估了两种菌株 (PNSB) 和 HAU-M1 的混合菌群从玉米秸秆 (CS) 中产生生物氢的潜力，而代谢是通过来自钴铁氧体磁性 PNC 的光诱导电子来催化的（钴铁氧体）。 CoFeO的阈值浓度（400 mg/L）在PNSB和HAU-M1中产生了428.62 mL和373.30 mL生物氢，分别比各自的对照组（CG）高129.0%和81.12%。 PNCs 的存在提供光生电子，催化代谢过程，PNSB 和 HAU-M1 中的丁酸分别增加 96.29% 和 94.87%，从而增加氢气产量。该结果得到了微生物群落调查的支持，表明适当浓度的 PNC 的加入有效地改变了细菌群落动态，并使门（、、和）和产氢属多样化。在连续三个循环中，PNSB 和 HAU-M1 发酵培养基中 CoFeO PNC 的回收率分别为（90.87 %、88.94 %）、（80.25 %、72.25 %）和（69.75 %、60.80 %），显示出在循环过程中回收催化剂的潜力。发酵过程。因此，选择正确的光催化剂和菌株可以影响新陈代谢和生物氢的产生，而可回收性则可以减少环境浸出。