NDLI: Biohydrogen production from sugarcane bagasse hydrolysate: effects of pH, S/X, Fe$^{2+}$, and magnetite nanoparticles

Content Provider	Springer Nature Link
Author	Reddy, Karen Nasr, Mahmoud Kumari, Sheena Kumar, Santhosh Gupta, Sanjay Kumar Enitan, Abimbola Motunrayo Bux, Faizal
Copyright Year	2017
Abstract	Batch dark fermentation experiments were conducted to investigate the effects of initial pH, substrate-to-biomass (S/X) ratio, and concentrations of Fe$^{2+}$ and magnetite nanoparticles on biohydrogen production from sugarcane bagasse (SCB) hydrolysate. By applying the response surface methodology, the optimum condition of steam-acid hydrolysis was 0.64% (v/v) H$_{2}$SO$_{4}$ for 55.7 min, which obtained a sugar yield of 274 mg g$^{−1}$. The maximum hydrogen yield (HY) of 0.874 mol (mol glucose$^{−1}$) was detected at the optimum pH of 5.0 and S/X ratio of 0.5 g chemical oxygen demand (COD, g VSS$^{−1}$). The addition of Fe$^{2+}$ 200 mg L$^{−1}$ and magnetite nanoparticles 200 mg L$^{−1}$ to the inoculum enhanced the HY by 62.1% and 69.6%, respectively. The kinetics of hydrogen production was estimated by fitting the experimental data to the modified Gompertz model. The inhibitory effects of adding Fe$^{2+}$ and magnetite nanoparticles to the fermentative hydrogen production were examined by applying Andrew’s inhibition model. COD mass balance and full stoichiometric reactions, including soluble metabolic products, cell synthesis, and H$_{2}$ production, indicated the reliability of the experimental results. A qPCR-based analysis was conducted to assess the microbial community structure using Enterobacteriaceae, Clostridium spp., and hydrogenase-specific gene activity. Results from the microbial analysis revealed the dominance of hydrogen producers in the inoculum immobilized on magnetite nanoparticles, followed by the inoculum supplemented with Fe$^{2+}$ concentration. Graphical abstract ᅟ
Starting Page	8790
Ending Page	8804
Page Count	15
File Format	PDF
ISSN	09441344
Journal	Environmental Science and Pollution Research
Volume Number	24
Issue Number	9
e-ISSN	16147499
Language	English
Publisher	Springer Berlin Heidelberg
Publisher Date	2017-02-18
Publisher Place	Berlin, Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Biohydrogen Dark fermentation Full stoichiometry Hydrogen-producing microbes Magnetite nanoparticles Sugarcane bagasse hydrolysate Environment Environmental Chemistry Ecotoxicology Environmental Health Atmospheric Protection/Air Quality Control/Air Pollution Waste Water Technology Water Pollution Control Water Management Aquatic Pollution
Content Type	Text
Resource Type	Article
Subject	Environmental Chemistry Health, Toxicology and Mutagenesis Pollution Medicine

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