A developed hybrid fixed-bed bioreactor with Fe-modified zeolite to enhance and sustain biohydrogen production

Zhao, Chao; Sharma, Aditya; Ma, Qiansu; Zhu, Yun-Xin; Li, Dawei; Liu, Zhiyuan; Yang, Yingnan

doi:10.1016/j.scitotenv.2020.143658

Cited by 30 publications

(11 citation statements)

References 52 publications

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“…Metal ions are part of enzymes, and they also take part in the processes of cell transport. Hydrogenase, a key enzyme involved in hydrogen production, contains a FeFe or NiFe bimetallic centre surrounded by FeS protein clusters [15][16]. Lee et al [16] studied the effect of iron concentration on DF and found that the maximum hydrogen yield was 131.9 ml/g sucrose at an iron concentration of 800 mg FeCl2/l, and the maximum specific rate of hydrogen production was 24 ml/g volatile suspended solids (VSS) per hour at adding 4000 mg FeCl2/l to the medium.…”

Section: Discussionmentioning

confidence: 99%

“…Among various types of industrial wastewater, confectionery wastewater is rich in carbohydrates and is an ideal substrate for the production of hydrogen by anaerobic bacteria [11]. Several publications mention that sugar-rich wastewater, such as wastewater from molasses production, sugar beet and sugarcane processing, can produce high yields of hydrogen, up to 3.2 mol/mol of carbohydrates [12], and usually gives a relatively lower H2 yield of about 1.9 mol/mol of glucose [13][14][15][16].…”

Section: Introductionmentioning

confidence: 99%

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Influence of confectionery wastewater pretreatment in vortex layer apparatus on its physical and chemical properties

et al. 2022

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The paper studies the effect of pretreatment of highly concentrated wastewater from confectionery production in a vortex layer apparatus (VLA) on its physical and chemical properties, with the aim of its further use as a substrate for dark fermentation with the production of biohydrogen. Pretreatment in VLA resulted in a 2.6-fold increase in the iron content and 6.5% increase in soluble chemical oxygen demand after 3 minutes of exposure. After pretreatment in VLA, an increase in the content of acetic acid and a decrease in the contents of propionic, butyric and caproic acids were observed. An increase in the content of mono- and disaccharides was registered, and the effect of the VLA exposure time of confectionery wastewater on its physicochemical properties was studied. An increase in the concentration of iron and simple sugars in wastewater makes the use of VLA promising for improving the process of its subsequent dark fermentation.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Influence of confectionery wastewater pretreatment in vortex layer apparatus on its physical and chemical properties

et al. 2022

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“…As a result, inorganic carriers are preferred because of their superior mechanical stability compared to their organic counterparts [ 45 ]. It was recently shown that a long-term H 2 production process (50 days) could be achieved using chlorinated polyethylene (CPE) and zeolite as microbial and nutritional carriers in a hybrid reactor that was operated under semi-continuous conditions [ 46 ]. Interestingly, the hybrid-Fe reactor coupled with zeolite could produce H 2 for up to 72 days without any process instabilities.…”

Section: Biofilm Enrichment Methods Applied In Biohydrogen Fermenter ...mentioning

confidence: 99%

“…Interestingly, the hybrid-Fe reactor coupled with zeolite could produce H 2 for up to 72 days without any process instabilities. The acetate pathway (the main H 2 metabolic route) was induced by the synergistic biofilms [ 46 ]. These outstanding results are attributed to the superior properties of CPE and zeolite.…”

Section: Biofilm Enrichment Methods Applied In Biohydrogen Fermenter ...mentioning

confidence: 99%

Elucidating the Role of Biofilm-Forming Microbial Communities in Fermentative Biohydrogen Process: An Overview

et al. 2022

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Amongst the biofuels described in the literature, biohydrogen has gained heightened attention over the past decade due to its remarkable properties. Biohydrogen is a renewable form of H2 that can be produced under ambient conditions and at a low cost from biomass residues. Innovative approaches are continuously being applied to overcome the low process yields and pave the way for its scalability. Since the process primarily depends on the biohydrogen-producing bacteria, there is a need to acquire in-depth knowledge about the ecology of the various assemblages participating in the process, establishing effective bioaugmentation methods. This work provides an overview of the biofilm-forming communities during H2 production by mixed cultures and the synergistic associations established by certain species during H2 production. The strategies that enhance the growth of biofilms within the H2 reactors are also discussed. A short section is also included, explaining techniques used for examining and studying these biofilm structures. The work concludes with some suggestions that could lead to breakthroughs in this area of research.

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“…Fluorescent hybrid materials, which combine the advantages of both organic and inorganic material, have become one of the most popular star materials in modern society due to their potential applications in many fields such as sensor technology [ 1 , 2 , 3 , 4 , 5 , 6 ], photoelectric device [ 7 , 8 , 9 , 10 , 11 , 12 ], biomedicine [ 13 , 14 , 15 , 16 , 17 ], and environmental sciences [ 18 , 19 , 20 , 21 ]. However, the demand for high-performance and multifunctional fluorescent materials has increased dramatically along with the development of science and technology.…”

Section: Introductionmentioning

confidence: 99%

Design of Fluorescent Hybrid Materials Based on POSS for Sensing Applications

et al. 2022

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Polyhedral oligomeric silsesquioxane (POSS) has a nanoscale silicon core and eight organic functional groups on the surface, with sizes from 0.7 to 1.5 nm. The three-dimensional nanostructures of POSS can be used to build all types of hybrid materials with specific performance and controllable nanostructures. The applications of POSS-based fluorescent materials have spread across various fields. In particular, the employment of POSS-based fluorescent materials in sensing application can achieve high sensitivity, selectivity, and stability. As a result, POSS-based fluorescent materials are attracting increasing attention due to their fascinating vistas, including unique structural features, easy fabrication, and tunable optical properties by molecular design. Here, we summarize the current available POSS-based fluorescent materials from design to sensing applications. In the design section, we introduce synthetic strategies and structures of the functionalized POSS-based fluorescent materials, as well as photophysical properties. In the application section, the typical POSS-based fluorescent materials used for the detection of various target objects are summarized with selected examples to elaborate on their wide applications.

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A developed hybrid fixed-bed bioreactor with Fe-modified zeolite to enhance and sustain biohydrogen production

Cited by 30 publications

References 52 publications

Influence of confectionery wastewater pretreatment in vortex layer apparatus on its physical and chemical properties

Influence of confectionery wastewater pretreatment in vortex layer apparatus on its physical and chemical properties

Elucidating the Role of Biofilm-Forming Microbial Communities in Fermentative Biohydrogen Process: An Overview

Design of Fluorescent Hybrid Materials Based on POSS for Sensing Applications

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