Key Laboratory of New Materials and Facilities for Rural Renewable Energy (MOA of China), Henan Agricultural University, Zhengzhou 450002, China.
Institute of Atmospheric Pollution Research of Italian National Research Council, Rome 29300, Italy.
Bioresour Technol. 2021 Oct;338:125549. doi: 10.1016/j.biortech.2021.125549. Epub 2021 Jul 13.
This study explored the interrelationship between nano-TiO addition and photo-fermentative hydrogen production (PFHP) of corn straw. The maximum cumulative hydrogen volume (CHV) was up to 688.8 mL under the optimal photo-fermentative process conditions with nano-TiO addition of 300 mg/L. Initial pH and interaction between substrate concentration and light intensity had highly significant effects on PFHP of corn straw with nano-TiO addition. With the improvement of CHV, nano-TiO addition decreased the optimal initial pH and substrate concentration for PFHP of corn straw. Moreover, nano-TiO addition promoted the metabolism of butyric acid and acetic acid by photosynthetic bacteria HAU-M1, and significantly reduced the total concentration of intermediate byproducts during hydrogen production to a low level of 1.6-2.5 g/L, thus making the CHV, maximum hydrogen production rate (HPR) and average hydrogen content (HC) increased by 32.6%, 27.9% and 8.3% respectively over the control without nano-TiO addition.
本研究探讨了纳米 TiO 添加剂与玉米秸秆光合产氢（PFHP）之间的相互关系。在添加 300mg/L 纳米 TiO 的最佳光合发酵条件下，最大累积产氢量（CHV）达到 688.8mL。初始 pH 值和底物浓度与光照强度之间的相互作用对添加纳米 TiO 的玉米秸秆 PFHP 有高度显著的影响。随着 CHV 的提高，添加纳米 TiO 降低了 PFHP 对玉米秸秆的最佳初始 pH 值和底物浓度。此外，纳米 TiO 添加剂促进了光合细菌 HAU-M1 中丁酸和乙酸的代谢，并显著降低了产氢过程中中间副产物的总浓度至 1.6-2.5g/L 的低水平，从而使 CHV、最大产氢率（HPR）和平均氢含量（HC）分别比不添加纳米 TiO 的对照提高了 32.6%、27.9%和 8.3%。
