The Experts below are selected from a list of 6285 Experts worldwide ranked by ideXlab platform
Yanyan Jing - One of the best experts on this subject based on the ideXlab platform.
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Biohydrogen Production through active saccharification and photo-fermentation from alfalfa.
Bioresource technology, 2020Co-Authors: Yanyan Jing, Yi Wang, Quanguo Zhang, Huan Zhang, Nadeem Tahir, Duu-jong Lee, Xiaoyu Liang, Jian WangAbstract:Abstract Studying Biohydrogen Production from alfalfa is of practical significance to cleaner Production and biomass utilization. The performances of Biohydrogen Production through active/passive saccharification and photo-fermentation were compared. The effects of initial pH, substrate concentration, and cellulase loading on Biohydrogen Production from alfalfa by photosynthetic bacteria HAU-M1 were presented. It was found that the maximum hydrogen yield of 55.81 mL/g was achieved at initial pH of 6.90, substrate concentration of 31.23 g/mL, and cellulase loading of 0.13 g/g. Hydrogen yield of active saccharification and photo-fermentation was much higher as compare to passive saccharification and photo-fermentation. Initial pH value showed a more significant influence on photosynthetic bacteria in comparison to cellulase in active saccharification and photo-fermentation Biohydrogen Production. The low yield of propionic acid suggested that it was an efficient photosynthetic hydrogen Production. Photo-fermentation hydrogen Production from alfalfa provides a novel path for efficient utilization of alfalfa.
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An automated control system for pilot-scale Biohydrogen Production: Design, operation and validation
International Journal of Hydrogen Energy, 2020Co-Authors: Huan Zhang, Quanguo Zhang, Nadeem Tahir, Yanyan Jing, Chen-yeon Chu, Yang ZhangAbstract:Abstract Studying Biohydrogen Production via sequential dark- and photo-fermentation at the pilot-scale is of practical significance. In this study, an 11 m3 pilot-scale bioreactor was used to investigate Biohydrogen Production via dark- and photo-fermentation. Solar energy was used to provide heat, illumination, and power for the bioreactor, thereby reducing Biohydrogen Production cost greatly and indirectly reducing carbon emissions. Gas Production rates were 96.30 mol/m3-d and 224.68 mol/m3-d via dark- and photo-fermentation, respectively. The pH values and oxidation-reduction potential varied from 5.13 to 5.92 and −382 mV to −490 mV, respectively. Low relative average deviations between on-line and off-line data show efficient stability. This automated reactor system could potentially contribute industrialization of Biohydrogen Production.
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Enhancement of pH values stability and photo-fermentation Biohydrogen Production by phosphate buffer
Bioengineered, 2020Co-Authors: Siyi Guo, Yanyan Jing, Jian Wang, Kaixin Wang, Zhiping Zhang, Quanguo ZhangAbstract:The main aim of this study was to investigate the effects of the initial pH values of the buffer on photo-fermentation Biohydrogen Production. Hydrogen Production and the kinetics of it under different initial pH values were analyzed. Effects of initial pH values on reducing sugar consumption, hydrogen Production rate, and byproduct Production were evaluated at initial pH values of 5-7. The results showed that initial pH values of phosphate buffer had a significant effect on Biohydrogen Production via photo-fermentation. With the initial pH value of phosphate buffer at 6.0, the cumulative hydrogen Production reached its maximum, 569.6 mL. The maximum hydrogen Production rate was 23.96 mL/h at the initial pH value of 6.5. With the initial pH values at 5.0 and 7.5, the maximum hydrogen Production rates were becoming lower, only 5.59 mL/h and 5.42 mL/h, respectively. And with the increase in pH values, the peak period of hydrogen Production was gradually delayed, indicating that the alkaline environment had a negative effect on the ability of photosynthetic bacteria. This study revealed the influence of phosphate buffer initial pH values on the Biohydrogen Production via photo-fermentation and aimed to provide a scientific reference for further improving the theory and technology for Biohydrogen Production from biomass.
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Biohydrogen Production in pilot scale fermenter effects of hydraulic retention time and substrate concentration
Journal of Cleaner Production, 2019Co-Authors: Chaoyang Lu, Yi Wang, Quanguo Zhang, Huan Zhang, Nadeem Tahir, Yanyan Jing, Kai ZhangAbstract:Abstract Systematic investigation of the effects of hydraulic retention time and substrate concentration on Biohydrogen Production rates in pilot-scale fermenter is of great academic and practical interests. The present study applied a 3 m3 pilot-scale bioreactor that composed of three sequential 1 m3 chambers (#1-#3) to investigate the effects of hydraulic retention time and substrate concentration on Biohydrogen Production rates from glucose. The 48 h hydraulic retention time resulted in poor mixing of the medium; chamber #1, which received the feed substrate, converted too much glucose, and little glucose was left to be utilized in the following chambers. However, a 12 h hydraulic retention time allowed insufficient volatile fatty acids to be produced, so a reductive environment for Biohydrogen Production was difficult to establish. At the optimal hydraulic retention time, 24 h for the present fermenter, sufficient mixedness of the medium and fermentation times for all chambers maximized the Biohydrogen Production rates. Biohydrogen Production rates were increased as the substrate concentration was increased from 10 to 30 g/L, peaked at 100.16 mol/m3-d, and then decreased with the increase in substrate concentration. Unique in the literature, the reported data reveal the effects of substrate concentration on Biohydrogen Production rates in pilot-scale fermenter, guiding to the design and development of the pilot-scale bioreactors with high hydrogen yields that could help to improve the industrialization development of Biohydrogen Production.
Huan Zhang - One of the best experts on this subject based on the ideXlab platform.
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Biohydrogen Production through active saccharification and photo-fermentation from alfalfa.
Bioresource technology, 2020Co-Authors: Yanyan Jing, Yi Wang, Quanguo Zhang, Huan Zhang, Nadeem Tahir, Duu-jong Lee, Xiaoyu Liang, Jian WangAbstract:Abstract Studying Biohydrogen Production from alfalfa is of practical significance to cleaner Production and biomass utilization. The performances of Biohydrogen Production through active/passive saccharification and photo-fermentation were compared. The effects of initial pH, substrate concentration, and cellulase loading on Biohydrogen Production from alfalfa by photosynthetic bacteria HAU-M1 were presented. It was found that the maximum hydrogen yield of 55.81 mL/g was achieved at initial pH of 6.90, substrate concentration of 31.23 g/mL, and cellulase loading of 0.13 g/g. Hydrogen yield of active saccharification and photo-fermentation was much higher as compare to passive saccharification and photo-fermentation. Initial pH value showed a more significant influence on photosynthetic bacteria in comparison to cellulase in active saccharification and photo-fermentation Biohydrogen Production. The low yield of propionic acid suggested that it was an efficient photosynthetic hydrogen Production. Photo-fermentation hydrogen Production from alfalfa provides a novel path for efficient utilization of alfalfa.
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An automated control system for pilot-scale Biohydrogen Production: Design, operation and validation
International Journal of Hydrogen Energy, 2020Co-Authors: Huan Zhang, Quanguo Zhang, Nadeem Tahir, Yanyan Jing, Chen-yeon Chu, Yang ZhangAbstract:Abstract Studying Biohydrogen Production via sequential dark- and photo-fermentation at the pilot-scale is of practical significance. In this study, an 11 m3 pilot-scale bioreactor was used to investigate Biohydrogen Production via dark- and photo-fermentation. Solar energy was used to provide heat, illumination, and power for the bioreactor, thereby reducing Biohydrogen Production cost greatly and indirectly reducing carbon emissions. Gas Production rates were 96.30 mol/m3-d and 224.68 mol/m3-d via dark- and photo-fermentation, respectively. The pH values and oxidation-reduction potential varied from 5.13 to 5.92 and −382 mV to −490 mV, respectively. Low relative average deviations between on-line and off-line data show efficient stability. This automated reactor system could potentially contribute industrialization of Biohydrogen Production.
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Biohydrogen Production in pilot scale fermenter effects of hydraulic retention time and substrate concentration
Journal of Cleaner Production, 2019Co-Authors: Chaoyang Lu, Yi Wang, Quanguo Zhang, Huan Zhang, Nadeem Tahir, Yanyan Jing, Kai ZhangAbstract:Abstract Systematic investigation of the effects of hydraulic retention time and substrate concentration on Biohydrogen Production rates in pilot-scale fermenter is of great academic and practical interests. The present study applied a 3 m3 pilot-scale bioreactor that composed of three sequential 1 m3 chambers (#1-#3) to investigate the effects of hydraulic retention time and substrate concentration on Biohydrogen Production rates from glucose. The 48 h hydraulic retention time resulted in poor mixing of the medium; chamber #1, which received the feed substrate, converted too much glucose, and little glucose was left to be utilized in the following chambers. However, a 12 h hydraulic retention time allowed insufficient volatile fatty acids to be produced, so a reductive environment for Biohydrogen Production was difficult to establish. At the optimal hydraulic retention time, 24 h for the present fermenter, sufficient mixedness of the medium and fermentation times for all chambers maximized the Biohydrogen Production rates. Biohydrogen Production rates were increased as the substrate concentration was increased from 10 to 30 g/L, peaked at 100.16 mol/m3-d, and then decreased with the increase in substrate concentration. Unique in the literature, the reported data reveal the effects of substrate concentration on Biohydrogen Production rates in pilot-scale fermenter, guiding to the design and development of the pilot-scale bioreactors with high hydrogen yields that could help to improve the industrialization development of Biohydrogen Production.
Nadeem Tahir - One of the best experts on this subject based on the ideXlab platform.
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Biohydrogen Production through active saccharification and photo-fermentation from alfalfa.
Bioresource technology, 2020Co-Authors: Yanyan Jing, Yi Wang, Quanguo Zhang, Huan Zhang, Nadeem Tahir, Duu-jong Lee, Xiaoyu Liang, Jian WangAbstract:Abstract Studying Biohydrogen Production from alfalfa is of practical significance to cleaner Production and biomass utilization. The performances of Biohydrogen Production through active/passive saccharification and photo-fermentation were compared. The effects of initial pH, substrate concentration, and cellulase loading on Biohydrogen Production from alfalfa by photosynthetic bacteria HAU-M1 were presented. It was found that the maximum hydrogen yield of 55.81 mL/g was achieved at initial pH of 6.90, substrate concentration of 31.23 g/mL, and cellulase loading of 0.13 g/g. Hydrogen yield of active saccharification and photo-fermentation was much higher as compare to passive saccharification and photo-fermentation. Initial pH value showed a more significant influence on photosynthetic bacteria in comparison to cellulase in active saccharification and photo-fermentation Biohydrogen Production. The low yield of propionic acid suggested that it was an efficient photosynthetic hydrogen Production. Photo-fermentation hydrogen Production from alfalfa provides a novel path for efficient utilization of alfalfa.
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An automated control system for pilot-scale Biohydrogen Production: Design, operation and validation
International Journal of Hydrogen Energy, 2020Co-Authors: Huan Zhang, Quanguo Zhang, Nadeem Tahir, Yanyan Jing, Chen-yeon Chu, Yang ZhangAbstract:Abstract Studying Biohydrogen Production via sequential dark- and photo-fermentation at the pilot-scale is of practical significance. In this study, an 11 m3 pilot-scale bioreactor was used to investigate Biohydrogen Production via dark- and photo-fermentation. Solar energy was used to provide heat, illumination, and power for the bioreactor, thereby reducing Biohydrogen Production cost greatly and indirectly reducing carbon emissions. Gas Production rates were 96.30 mol/m3-d and 224.68 mol/m3-d via dark- and photo-fermentation, respectively. The pH values and oxidation-reduction potential varied from 5.13 to 5.92 and −382 mV to −490 mV, respectively. Low relative average deviations between on-line and off-line data show efficient stability. This automated reactor system could potentially contribute industrialization of Biohydrogen Production.
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Biohydrogen Production in pilot scale fermenter effects of hydraulic retention time and substrate concentration
Journal of Cleaner Production, 2019Co-Authors: Chaoyang Lu, Yi Wang, Quanguo Zhang, Huan Zhang, Nadeem Tahir, Yanyan Jing, Kai ZhangAbstract:Abstract Systematic investigation of the effects of hydraulic retention time and substrate concentration on Biohydrogen Production rates in pilot-scale fermenter is of great academic and practical interests. The present study applied a 3 m3 pilot-scale bioreactor that composed of three sequential 1 m3 chambers (#1-#3) to investigate the effects of hydraulic retention time and substrate concentration on Biohydrogen Production rates from glucose. The 48 h hydraulic retention time resulted in poor mixing of the medium; chamber #1, which received the feed substrate, converted too much glucose, and little glucose was left to be utilized in the following chambers. However, a 12 h hydraulic retention time allowed insufficient volatile fatty acids to be produced, so a reductive environment for Biohydrogen Production was difficult to establish. At the optimal hydraulic retention time, 24 h for the present fermenter, sufficient mixedness of the medium and fermentation times for all chambers maximized the Biohydrogen Production rates. Biohydrogen Production rates were increased as the substrate concentration was increased from 10 to 30 g/L, peaked at 100.16 mol/m3-d, and then decreased with the increase in substrate concentration. Unique in the literature, the reported data reveal the effects of substrate concentration on Biohydrogen Production rates in pilot-scale fermenter, guiding to the design and development of the pilot-scale bioreactors with high hydrogen yields that could help to improve the industrialization development of Biohydrogen Production.
Quanguo Zhang - One of the best experts on this subject based on the ideXlab platform.
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Biohydrogen Production through active saccharification and photo-fermentation from alfalfa.
Bioresource technology, 2020Co-Authors: Yanyan Jing, Yi Wang, Quanguo Zhang, Huan Zhang, Nadeem Tahir, Duu-jong Lee, Xiaoyu Liang, Jian WangAbstract:Abstract Studying Biohydrogen Production from alfalfa is of practical significance to cleaner Production and biomass utilization. The performances of Biohydrogen Production through active/passive saccharification and photo-fermentation were compared. The effects of initial pH, substrate concentration, and cellulase loading on Biohydrogen Production from alfalfa by photosynthetic bacteria HAU-M1 were presented. It was found that the maximum hydrogen yield of 55.81 mL/g was achieved at initial pH of 6.90, substrate concentration of 31.23 g/mL, and cellulase loading of 0.13 g/g. Hydrogen yield of active saccharification and photo-fermentation was much higher as compare to passive saccharification and photo-fermentation. Initial pH value showed a more significant influence on photosynthetic bacteria in comparison to cellulase in active saccharification and photo-fermentation Biohydrogen Production. The low yield of propionic acid suggested that it was an efficient photosynthetic hydrogen Production. Photo-fermentation hydrogen Production from alfalfa provides a novel path for efficient utilization of alfalfa.
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An automated control system for pilot-scale Biohydrogen Production: Design, operation and validation
International Journal of Hydrogen Energy, 2020Co-Authors: Huan Zhang, Quanguo Zhang, Nadeem Tahir, Yanyan Jing, Chen-yeon Chu, Yang ZhangAbstract:Abstract Studying Biohydrogen Production via sequential dark- and photo-fermentation at the pilot-scale is of practical significance. In this study, an 11 m3 pilot-scale bioreactor was used to investigate Biohydrogen Production via dark- and photo-fermentation. Solar energy was used to provide heat, illumination, and power for the bioreactor, thereby reducing Biohydrogen Production cost greatly and indirectly reducing carbon emissions. Gas Production rates were 96.30 mol/m3-d and 224.68 mol/m3-d via dark- and photo-fermentation, respectively. The pH values and oxidation-reduction potential varied from 5.13 to 5.92 and −382 mV to −490 mV, respectively. Low relative average deviations between on-line and off-line data show efficient stability. This automated reactor system could potentially contribute industrialization of Biohydrogen Production.
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Enhancement of pH values stability and photo-fermentation Biohydrogen Production by phosphate buffer
Bioengineered, 2020Co-Authors: Siyi Guo, Yanyan Jing, Jian Wang, Kaixin Wang, Zhiping Zhang, Quanguo ZhangAbstract:The main aim of this study was to investigate the effects of the initial pH values of the buffer on photo-fermentation Biohydrogen Production. Hydrogen Production and the kinetics of it under different initial pH values were analyzed. Effects of initial pH values on reducing sugar consumption, hydrogen Production rate, and byproduct Production were evaluated at initial pH values of 5-7. The results showed that initial pH values of phosphate buffer had a significant effect on Biohydrogen Production via photo-fermentation. With the initial pH value of phosphate buffer at 6.0, the cumulative hydrogen Production reached its maximum, 569.6 mL. The maximum hydrogen Production rate was 23.96 mL/h at the initial pH value of 6.5. With the initial pH values at 5.0 and 7.5, the maximum hydrogen Production rates were becoming lower, only 5.59 mL/h and 5.42 mL/h, respectively. And with the increase in pH values, the peak period of hydrogen Production was gradually delayed, indicating that the alkaline environment had a negative effect on the ability of photosynthetic bacteria. This study revealed the influence of phosphate buffer initial pH values on the Biohydrogen Production via photo-fermentation and aimed to provide a scientific reference for further improving the theory and technology for Biohydrogen Production from biomass.
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Biohydrogen Production in pilot scale fermenter effects of hydraulic retention time and substrate concentration
Journal of Cleaner Production, 2019Co-Authors: Chaoyang Lu, Yi Wang, Quanguo Zhang, Huan Zhang, Nadeem Tahir, Yanyan Jing, Kai ZhangAbstract:Abstract Systematic investigation of the effects of hydraulic retention time and substrate concentration on Biohydrogen Production rates in pilot-scale fermenter is of great academic and practical interests. The present study applied a 3 m3 pilot-scale bioreactor that composed of three sequential 1 m3 chambers (#1-#3) to investigate the effects of hydraulic retention time and substrate concentration on Biohydrogen Production rates from glucose. The 48 h hydraulic retention time resulted in poor mixing of the medium; chamber #1, which received the feed substrate, converted too much glucose, and little glucose was left to be utilized in the following chambers. However, a 12 h hydraulic retention time allowed insufficient volatile fatty acids to be produced, so a reductive environment for Biohydrogen Production was difficult to establish. At the optimal hydraulic retention time, 24 h for the present fermenter, sufficient mixedness of the medium and fermentation times for all chambers maximized the Biohydrogen Production rates. Biohydrogen Production rates were increased as the substrate concentration was increased from 10 to 30 g/L, peaked at 100.16 mol/m3-d, and then decreased with the increase in substrate concentration. Unique in the literature, the reported data reveal the effects of substrate concentration on Biohydrogen Production rates in pilot-scale fermenter, guiding to the design and development of the pilot-scale bioreactors with high hydrogen yields that could help to improve the industrialization development of Biohydrogen Production.
Jianlong Wang - One of the best experts on this subject based on the ideXlab platform.
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Pretreatment of antibiotic fermentation residues by combined ultrasound and alkali for enhancing Biohydrogen Production
Journal of Cleaner Production, 2020Co-Authors: Yunpeng Shen, Jianlong WangAbstract:Abstract Antibiotic fermentation residues has been classified as “Hazardous Waste” in China since 2008, but its effective disposal and resource recovery remains a problem. Due to its high content of bioavailable organic matters, antibiotic fermentation residues can be utilized as a potential candidate for Biohydrogen Production. However, the complex matrix of antibiotic fermentation residues can restrict its efficiency of Biohydrogen Production. In this study, the effect of ultrasonic, alkaline and their combined pretreatments on the solubility of antibiotic fermentation residues was investigated to improve Biohydrogen Production. The results showed that the combined ultrasonic-alkaline pretreatment effectively disrupted the complex matrix of antibiotic fermentation residues and synergistically improved the Biohydrogen Production. Soluble chemical oxygen demand (SCOD) and soluble carbohydrate content were improved by 61.6% and 105% after the combined pretreatment, respectively. Due to the solubilization effect and the enhanced enzymatic hydrolysis, the hydrogen yield reached 17.0 mL/g-volatile solids (VS) with the combined pretreatment, which was 78.9% higher compared to the control group. The combined pretreatment also improved the hydrogen Production rate and substrate utilization, and decreased the lag time. Microbial community analysis showed that the hydrogen-producing bacteria (e.g. Paraclostridium, Escherichia-Shigella and Hafnia-Obesumbacterium) were more enriched with the combined pretreatment, while hydrogen-producing competitors were inhibited, which contributed to the more efficient hydrogen fermentation. This study demonstrated the technical feasibility of using ultrasonic-alkaline pretreatment to improve the Biohydrogen Production from antibiotic fermentation residues.
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Biohydrogen Production from co-fermentation of fallen leaves and sewage sludge.
Bioresource technology, 2019Co-Authors: Guang Yang, Jianlong WangAbstract:Abstract The co-fermentation of fallen leaves and sewage sludge was performed for the Production of hydrogen at different mixing ratios. The experimental results indicated that the optimal mixing ratio of sludge to leaves was 20:80 (volatile solids (VS) basis), and the co-fermentation process showed a synergistic effect on Biohydrogen Production at this mixing ratio. The biohydorgen yield reached 37.8 mL/g-VSadded at the mixing ratio of 20:80, which was higher compared to the mono-fermentation of sludge (10.3 mL/g-VSadded) or the leaves (30.5 mL/g-VSadded). The VS removal was also highest (15.7%) at the mixing ratio of 20:80, which was higher compared to sludge mono-fermentation (6.2%) or leaves mono-fermentation (12.8%). Meanwhile, the co-fermentation process enhanced the Biohydrogen Production rate and led to a more efficient fermentation pathway. Microbial community analysis showed that the co-fermentation system enriched much more Clostridium, Bacillus and Rummeliibacillus genera, which was responsible for the synergistic effect on Biohydrogen Production.
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Biohydrogen Production using waste activated sludge disintegrated by gamma irradiation
Applied Energy, 2015Co-Authors: Yanan Yin, Jianlong WangAbstract:Abstract The Biohydrogen Production using the disintegrated and dissolved sludge by gamma irradiation was studied. The experimental results showed that gamma irradiation and irradiation combined with alkali pretreatment could disintegrate and dissolve waste activated sludge for Biohydrogen Production. The alkali-irradiation treatment of the sludge at pH = 12 and 20 kGy achieved the highest disintegration and dissolution, i.e., it could destroy the cell walls and release organic matters (such as soluble COD, polysaccharides and protein) into the solution. The disintegrated sludge could be used as a low-cost substrate for Biohydrogen Production.